Manipulating the self-assembly of transition metal telluride nanocrystals(NCs) creates opportunities for exploring new properties and device applications. Iron ditelluride(FeTe2) has recently emerged as a new class of...Manipulating the self-assembly of transition metal telluride nanocrystals(NCs) creates opportunities for exploring new properties and device applications. Iron ditelluride(FeTe2) has recently emerged as a new class of magnetic semiconductor with three-dimensional(3D) magnetic ordering and narrow band gap structure, yet the self-assembly of FeTe2 NCs has not been achieved. Herein, the tree-like FeTe2 nanoarchitectures with orthorhombic crystal structure have been successfully synthesized by hot-injection solvent thermal approach using phosphine-free Te precursor. The morphology, size, and crystal structure have been investigated using transmission electron microscopy(TEM), high-resolution TEM(HRTEM),and powder x-ray diffraction(XRD). We study the formation process of tree-like FeTe2 NCs according to trace the change of the sample morphology with the reaction time. It was found that the FeTe2 nanoparticles show oriented aggregation and self-assembly behavior with the increase of reaction time, which is attributed to size-dependent magnetism properties of the samples. The magnetic interaction is thought to be the driving force of nanoparticle self-organization.展开更多
Surface area,pore properties,synergistic behavior,homogenous dispersion,and interactions between carbon matrix and metal-nanostructures are the key factors for achieving the better performance of carbon-metal based(el...Surface area,pore properties,synergistic behavior,homogenous dispersion,and interactions between carbon matrix and metal-nanostructures are the key factors for achieving the better performance of carbon-metal based(electro)catalysts.However,the traditional hydro-or solvothermal preparation of(electro)catalysts,particularly,bi-or tri-metallic nanostructures anchored graphene(G)or carbon nanotubes(CNTs),often pose to poor metal–support interaction,low synergism,and patchy dispersion.At first,bimetallic flower-like-CuFeS_(2)/NG and cube-like-NiFeS_(2)/NCNTs nanocomposites were prepared by solvothermal method.The resultant bimetallic nanocomposites were employed to derive the 2D-nano-sandwiched Fe_(2)CuNiS_(4)/NGCNTs-SW(electro)catalyst by a very simple and green urea-mediated“mix-heat”method.The desired physicochemical properties of Fe_(2)CuNiS_(4)/NGCNTs-SW such as multiple active sites,strong metal-support interaction,homogenous dispersion and enhanced surface area were confirmed by various microscopic and spectroscopic techniques.To the best of our knowledge,this is the first urea-mediated“mix-heat”method for preparing 2D-nano-sandwiched carbon-metal-based(electro)catalysts.The Fe_(2)CuNiS_(4)/NGCNTs-SW was found to be highly effective for alkaline-mediated oxygen evolution reaction at low onset potential of 284.24 mV,and the stable current density of 10 mA cm^(−2) in 1.0 m KOH for 10 h.Further,the Fe_(2)CuNiS_(4)/NGCNTs-SW demonstrated excellent catalytic activity in the reduction of 4-nitrophenol with good kapp value of 87.71×10^(−2)s^(-1)and excellent reusability over five cycles.Overall,the developed urea-mediated“mix-heat”method is highly efficient for the preparation of metal-nanoarchitectures anchored 2D-nano-sandwiched(electro)catalysts with high synergism,uniform dispersion and excellent metal-support interaction.展开更多
The development of urbanization and industrialization leads to rapid depletion of fossil fuels.Therefore,the production of fuel from renewable resources is highly desired.Electrotechnical energy conversion and storage...The development of urbanization and industrialization leads to rapid depletion of fossil fuels.Therefore,the production of fuel from renewable resources is highly desired.Electrotechnical energy conversion and storage is a benign technique with reliable output and is eco-friendly.Developing an exceptional electrochemical catalyst with tunable properties like a huge specific surface area,porous channels,and abundant active sites is critical points.Recently,Metal-organic frameworks(MOFs)and two-dimensional(2D)transition-metal carbides/nitrides(MXenes)have been extensively investigated in the field of electrochemical energy conversion and storage.However,advances in the research on MOFs are hampered by their limited structural stability and conventionally low electrical conductivity,whereas the practical electrochemical performance of MXenes is impeded by their low porosity,inadequate redox sites,and agglomeration.Consequently,researchers have been designing MOF/MXene nanoarchitectures to overcome the limitations in electrochemical energy conversion and storage.This review explores the recent advances in MOF/MXene nanoarchitectures design strategies,tailoring their properties based on the morphologies(0D,1D,2D,and 3D),and broadening their future opportunities in electrochemical energy storage(batteries,supercapacitors)and catalytic energy conversion(HER,OER,and ORR).The intercalation of MOF in between the MXene layers in the nanoarchitectures functions synergistically to address the issues associated with bare MXene and MOF in the electrochemical energy storage and conversion.This review gives a clear emphasis on the general aspects of MOF/MXene nanoarchitectures,and the future research perspectives,challenges of MOF/MXene design strategies and electrochemical applications are highlighted.展开更多
Semiconductor photocatalysis holds great promise for renewable energy generation and environment remediation,but generally suffers from the serious drawbacks on light absorption,charge generation and transport,and str...Semiconductor photocatalysis holds great promise for renewable energy generation and environment remediation,but generally suffers from the serious drawbacks on light absorption,charge generation and transport,and structural stability that limit the performance.The core-shell semiconductorgraphene(CSSG)nanoarchitectures may address these issues due to their unique structures with exceptional physical and chemical properties.This review explores recent advances of the CSSG nanoarchitectures in the photocatalytic performance.It starts with the classification of the CSSG nanoarchitectures by the dimensionality.Then,the construction methods under internal and external driving forces were introduced and compared with each other.Afterward,the physicochemical properties and photocatalytic applications of these nanoarchitectures were discussed,with a focus on their role in photocatalysis.It ends with a summary and some perspectives on future development of the CSSG nanoarchitectures toward highly efficient photocatalysts with extensive application.By harnessing the synergistic capabilities of the CSSG architectures,we aim to address pressing environmental and energy challenges and drive scientific progress in these fields.展开更多
To address the sluggish kinetics and limited current density in the alkaline hydrogen evolution reaction(HER),we designed and synthesized dandelion-like V-doped CoP anchored on carbon cloth(V-CoP-X)via a MOF-derived s...To address the sluggish kinetics and limited current density in the alkaline hydrogen evolution reaction(HER),we designed and synthesized dandelion-like V-doped CoP anchored on carbon cloth(V-CoP-X)via a MOF-derived strategy involving hydrothermal growth and subsequent phosphidation.By precisely controlling the V content in the MOF precursor,we achieve tunable morphologies of V-CoP materials.Experimental analyses reveal that Lewis acid sites of V promote electron transfer and adjust the d-band centers of V-CoP.According to the results of experimental and density functional theory(DFT)calculations,the V-doped CoP lowers the water dissociation energy in alkaline media and optimizes the adsorption energy for H^(*)(ΔG_(H^(*))).These synergistic effects accelerate water dissociation kinetics as well as optimize adsorption and desorption behavior of H^(*),leading to improved HER activity in 1 M KOH and 0.5 M H_(2)SO_(4).As a result,the optimal V-CoP electrode exhibits exceptional HER performance in diverse electrolytes,requiring low overpotentials of 69,63 and 89 mV to obtain 10 mA cm^(-2)as well as 212,254 and 401 mV at 500 mA cm^(-2)in 1 M KOH,1 M KOH+0.5 M NaCl and 0.5 M H_(2)SO_(4),respectively.Remarkably,V-doped CoP possesses excellent long-term stability at large current density.This work presents a highperformance HER electrocatalyst while providing fundamental insights into the role of V doping in enhancing reaction kinetics.展开更多
Zn-air batteries(ZABs)have been widely studied due to their high theoretical energy density,low cost,and high safety.However,the lack of efficient bifunctional electrocatalysts toward both the oxygen reduction reactio...Zn-air batteries(ZABs)have been widely studied due to their high theoretical energy density,low cost,and high safety.However,the lack of efficient bifunctional electrocatalysts toward both the oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)hinders their large-scale application.Herein,a dendritic NiS_(2)@Co-N-C/CNF nanoarchitecture is proposed.展开更多
The emergence of antibiotic-resistant bacteria has become a major threat to global public health and has prompted the discovery of antibiotic alternatives.Natural antimicrobial peptides(AMPs)confer a unique non-specif...The emergence of antibiotic-resistant bacteria has become a major threat to global public health and has prompted the discovery of antibiotic alternatives.Natural antimicrobial peptides(AMPs)confer a unique non-specific membrane rupture mechanism,showing great potential in killing drug-resistant bacteria.However,natural AMPs have certain weaknesses,including stability and toxicity issues,which seriously hinder their in vivo applications.Synthetic AMPs possess similar characteristics to natural AMPs,including positive charges,amphiphilicity,and the ability to fold into diverse secondary structures.These properties are essential for AMPs penetration into membranes,allowing them to exhibit antimicrobial effects.Moreover,supramolecular self-assembly,facilitated by hydrophobic interaction,hydrogen bonding,π-πstacking,and electrostatic interaction,can generate nanoparticles,nanotubes,nanofibers,and hydrogels with well-defined nanoarchitectures.Utilizing peptide self-assembly to form various nanoarchitectures is an effective approach for generating antibacterial nanomaterials,offering potential advantages such as enhanced antibacterial properties,improved stability,and reduced cytotoxicity.This review highlights recent advancements in tailoring supramolecular AMPs to create diverse nano-architectures for combating infectious diseases.展开更多
To construct supercapacitors(SCs)with high-efficient electrochemical properties,the morphology and structure of applied electrode materials are the key factors.Herein,three-dimensional(3D)sea urchin-like MnCo_(2)O_(4)...To construct supercapacitors(SCs)with high-efficient electrochemical properties,the morphology and structure of applied electrode materials are the key factors.Herein,three-dimensional(3D)sea urchin-like MnCo_(2)O_(4)nanoarchitectures grown on Ni foam(NF)were successfully synthesized via a simple solvothermal method and subsequent annealing treatment.Electrochemical tests revealed that the area specific capacitances of the MnCo_(2)O_(4)electrode and the corresponding assembled asymmetric device can achieve 1634 and 522 mF·cm^(-2),respectively.When the power density of the assembled asymmetric supercapacitor(ASC)is 2.25 mW·cm^(-2),the maximum energy density can reach 0.163 mW·h·cm^(-2).After 5500 cycles of long-term stability test,the capacity retention rate maintains 91.7%.The excellent electrochemical performance can be mainly ascribed to the unique nanostructure of the material,which provides a great quantity of electroactive sites for Faraday redox reactions as well as accelerates the process of the ions/electrons transport.This work provides a certain reference value for the preparation of MnCo_(2)O_(4)electrode with novel structure and excellent electrochemical performance for SCs.展开更多
NiMo-based nanostructures are among the most active hydrogen evolution reaction(HER)catalysts under an alkaline environment due to their strong water dissociation ability.However,these nanostructures are vulnerable to...NiMo-based nanostructures are among the most active hydrogen evolution reaction(HER)catalysts under an alkaline environment due to their strong water dissociation ability.However,these nanostructures are vulnerable to the destructive effects of H_(2) production,especially at industry-standard current densities.Therefore,developing a strategy to improve their mechanical strength while maintaining or even further increasing the activity of these nanocatalysts is of great interest to both the research and industrial communities.Here,a hierarchical interconnected NiMoN(HW-NiMoN-2h)with a nanorod-nanowire morphology was synthesized based on a rational combination of hydrothermal and water bath processes.HW-NiMoN-2h is found to exhibit excellent HER activity due to the accomodation of abundant active sites on its hierarchical morphology,in which nanowires con-nect free-standing nanorods,concurrently strengthening its structural stability to withstand H_(2) production at 1 A cm^(−2).Seawater is an attractive feedstock for water electrolysis since H_(2) generation and water desalination can be addressed simultaneously in a single process.The HER performance of HW-NiMoN-2h in alkaline seawater suggests that the presence of Na+ions interferes with the reation kinetics,thus lowering its activity slightly.However,benefiting from its hierarchical and interconnected characteristics,HW-NiMoN-2h is found to deliver outstanding HER activity of 1 A cm^(−2) at 130 mV overpotential and to exhibit excellent stability at 1 A cm^(−2) over 70 h in 1 M KOH seawater.展开更多
Advanced electromagnetic devices,as the pillars of the intelligent age,are setting off a grand transformation,redefining the structure of society to present pluralism and diversity.However,the bombardment of electroma...Advanced electromagnetic devices,as the pillars of the intelligent age,are setting off a grand transformation,redefining the structure of society to present pluralism and diversity.However,the bombardment of electromagnetic radiation on society is also increasingly serious along with the growing popularity of"Big Data".Herein,drawing wisdom and inspiration from nature,an eco-mimetic nanoarchitecture is constructed for the first time,highly integrating the advantages of multiple components and structures to exhibit excellent electromagnetic response.Its electromagnetic properties and internal energy conversion can be flexibly regulated by tailoring microstructure with oxidative molecular layer deposition(oMLD),providing a new cognition to frequency-selective microwave absorption.The optimal reflection loss reaches≈−58 dB,and the absorption frequency can be shifted from high frequency to low frequency by increasing the number of oMLD cycles.Meanwhile,a novel electromagnetic absorption surface is designed to enable ultra-wideband absorption,covering almost the entire K and Ka bands.More importantly,an ingenious self-powered device is constructed using the eco-mimetic nanoarchitecture,which can convert electromagnetic radiation into electric energy for recycling.This work offers a new insight into electromagnetic protection and waste energy recycling,presenting a broad application prospect in radar stealth,information communication,aerospace engineering,etc.展开更多
Semiconductor nanomaterial-based epitaxial heterostructures with precisely controlled compositions and morphologies are of great importance for various applications in optoelectronics,thermoelectrics,and catalysis.Unt...Semiconductor nanomaterial-based epitaxial heterostructures with precisely controlled compositions and morphologies are of great importance for various applications in optoelectronics,thermoelectrics,and catalysis.Until now,various kinds of epitaxial heterostructures have been constructed.In this minireview,we will first introduce the synthesis of semiconductor nanomaterial-based epitaxial heterostructures by wet-chemical methods.Various architectures based on different kinds of seeds or templates are illustrated,and their growth mechanisms are discussed in detail.Then,the applications of epitaxial heterostructures in optoelectronics,catalysis,and thermoelectrics are described.Finally,we provide some challenges and personal perspectives for the future research directions of semiconductor nanomaterial-based epitaxial heterostructures.展开更多
Rare-earth sulfides are of research interest for lithium-ion batteries(LIBs)due to their abundant lithium intercalation sites and low redox voltage.However,their electrochemical performances are not satisfactory becau...Rare-earth sulfides are of research interest for lithium-ion batteries(LIBs)due to their abundant lithium intercalation sites and low redox voltage.However,their electrochemical performances are not satisfactory because of poor conductivity and volume change upon electrochemical cycling.Herein,nanoarchitectures ofγ-Ce_(2)S_(3)encapsulated in a hollow mesoporous carbon nanosphere(Ce_(2)S_(3)@HMCS)are fabricated using the self-template strategy combined with the in-sphere sulfuration method and tested as an LIB anode.The void space between the Ce_(2)S_(3)core and the outer layer of the carbon nanosphere has been properly designed and modulated to achieve excellent electrochemical performance in terms of electronic conductivity,reversibility,and rate capability.The reversible capacity of Ce_(2)S_(3)@HMCS is 2.6 times that of the pure Ce_(2)S_(3)anode,which can gradually increase and maintain a capacity of 282 mAh·g^(−1)at a current density of 1 A·g^(-1),and a high Coulombic efficiency(~100%)can be achieved even after 1000 cycles.This good performance is attributed to the unique yolk-shell nanostructure with a highly crystallized and stable Ce3S2 core and volume expansion buffer space upon lithiation/delithiation.Ex situ X-ray diffraction and nuclear magnetic resonance results indicate that the lithiation of Ce_(2)S_(3)@HMCS is an intercalation process.This study represents an important advancement in precise structural design with in-sphere sulfuration and sheds light on a potential direction for highperformance lithium storage.展开更多
One of the major challenges faced by the biomedical industry is the development of robust synthetic surfaces that can resist bacterial colonization.Much inspiration has been drawn recently from naturally occurring mec...One of the major challenges faced by the biomedical industry is the development of robust synthetic surfaces that can resist bacterial colonization.Much inspiration has been drawn recently from naturally occurring mechano-bactericidal surfaces such as the wings of cicada(Psaltoda claripennis)and dragonfly(Diplacodes bipunctata)species in fabricating their synthetic analogs.However,the bactericidal activity of nanostructured surfaces is observed in a particular range of parameters reflecting the geometry of nanostructures and surface wettability.Here,several of the nanometer-scale characteristics of black silicon(bSi)surfaces including the density and height of the nanopillars that have the potential to influence the bactericidal efficiency of these nanostructured surfaces have been investigated.The results provide important evidence that minor variations in the nanoarchitecture of substrata can substantially alter their performance as bactericidal surfaces.展开更多
Hydrogenation of aromatic rings can be used not only for synthesis of fine chemicals,but also for hydrogen storage and transportation using organic hydrides.In this paper,a yolk–shell structured SiO_(2)@Ru@NC catalys...Hydrogenation of aromatic rings can be used not only for synthesis of fine chemicals,but also for hydrogen storage and transportation using organic hydrides.In this paper,a yolk–shell structured SiO_(2)@Ru@NC catalyst,which was successfully synthesized by a strategy combining a modified Stöber method and vacuum-assisted impregnation,revealed excellent catalytic activity in dimethyl terephthalate(DMT)hydrogenation to dimethyl 1,4-cyclohexanedicarboxylate(DMCD),which is a green chemical reagent and precursor for high-value chemicals.Characterization results showed that highly dispersed Ru NPs with subnanometer size distribution were encapsulated in the yolk–shell nanoarchitecture and the mesoporous shell could ensure unhindered diffusion of reactant molecules.Moreover,yolk–shell structure-induced interaction of Ru and the carbon shell allowed for tuning the electronic structure of the Ru species,which in turn could regulate the catalytic properties.The yolk–shell nanoarchitecture catalyst offers advantages of low active metal loading,and excellent activity and stability,and thus can expand applications of ultra-low loaded precious metal catalysts in catalytic conversion of aromatic compounds.展开更多
2D MXene nanosheets are regarded as promising cathode catalysts towards the hydrogen evolution reaction (HER), while their overall electrocatalytic ability still needs to be optimized before the practical application....2D MXene nanosheets are regarded as promising cathode catalysts towards the hydrogen evolution reaction (HER), while their overall electrocatalytic ability still needs to be optimized before the practical application. In this contribution, we put forward a controllable assembly approach for constructing a heterostructured nanoarchitecture made from ultrafine MoS_(2) quantum dot-decorated Ti_(3)C_(2)T_(x) MXene nanosheets (MQDs/Ti_(3)C_(2)T_(x)). Benefiting from the remarkable structural features of the ultrathin catalyst layers, homogeneous MoS_(2) distribution, optimized electronic structure, and good electron conductivity, the resulting MQD/Ti_(3)C_(2)T_(x) catalyst exhibits superior HER properties with a low onset potential of 66 mV, a small Tafel slope of 74 mV dec^(-1), and a long lifespan, in contrast to the insufficient HER ability for bare MoS_(2) quantum dots and Ti_(3)C_(2)T_(x) itself. DFT calculations further disclose the optimized band structure of the MQDs/Ti_(3)C_(2)T_(x) model with numerous diverse active sites, which play fundamental roles in boosting the HER kinetics.展开更多
Exploring economical,high-efficiency and durable electrocatalysts for the oxygen evolution reaction(OER)is of critical importance for the advancement of sustainable energy conversion technologies,including water elect...Exploring economical,high-efficiency and durable electrocatalysts for the oxygen evolution reaction(OER)is of critical importance for the advancement of sustainable energy conversion technologies,including water electrolysis and metal–air batteries.Compositional manipulation via heteroatom-doping and nanoarchitectural design of Earth-abundant electrocatalysts are extensively established as valid strategies to effectively optimize the electrocatalytic performance due to the electronic modulation and geometric effect.展开更多
Solar-driven photoelectrochemical(PEC) water splitting is a promising technology for sustainable hydrogen production, which relies on the development of efficient and stable photoanodes for water oxidation reaction. T...Solar-driven photoelectrochemical(PEC) water splitting is a promising technology for sustainable hydrogen production, which relies on the development of efficient and stable photoanodes for water oxidation reaction. The thickness and microstructure of semiconductor films are generally crucial to their PEC properties. Herein, three-dimensional(3D) interconnected nanoporous Ta3N5 film photoanodes with controlled thickness were successfully fabricated via galvanostatic anodization and NH3 nitridation. The porous Ta3N5 nanoarchitectures(NAs) of 900 nm in thickness showed the highest PEC performance due to the optimal lightharvesting and charge separation. Compared with the holeinduced photocorrosion, the electrochemical oxidation at high anodic potentials resulted in severer performance degradation of Ta3N5. Although the surface oxide layer on deteriorated Ta3N5 photoanodes could be removed by NH3 re-treatment,the PEC performance was only partially recovered. As an alternative, anchoring a dual-layer Co(OH)x/Co OOH co-catalyst shell on the porous Ta3N5 NAs demonstrated substantially enhanced PEC performance and stability. Overall, this work provides reference to controllably fabricate 3D nanoporous Ta3N5-based photoanodes for efficient and stable PEC water splitting via optimizing the light absorption, hole extraction,charge separation and utilization.展开更多
Nanostructured TiO2 has applications in solar cells, photocatalysts, and fast- charging, safe lithium ion batteries （LIBs）. To meet the demand of high-capacity and high-rate LIBs with TiO2-based anodes, it is import...Nanostructured TiO2 has applications in solar cells, photocatalysts, and fast- charging, safe lithium ion batteries （LIBs）. To meet the demand of high-capacity and high-rate LIBs with TiO2-based anodes, it is important to fine-tune the nanoarchitecture using a well-controlled synthesis approach. Herein, we report a new approach that involves epitaxial growth combined with topotactic conversion to synthesize a unique type of three-dimensional （3D） TiO2 nano- architecture that is assembled by well-oriented ultrathin nanobelts. The whole nanoarchitecture displays a 3D Chinese knot-like morphology; the core consists of robust perpendicular interwoven nanobelts and the shell is made of extended nanobelts. The nanobelts oriented in three perpendicular [001]A directions facilitate Li＋ penetration and diffusion. Abundant anatase/TiO2-B interfaces provide a large amount of interfacial pseudocapacitance. A high and stable capacity of 130 mA.h.g-1 was obtained after 3,000 cycles at 10 A·g-1 （50 C）, and the high-rate property of our material was greater than that of many recently reported high-rate TiO2 anodes. Our result provides, not only a novel synthesis strategy, but also a new type of 3D anatase TiO2 anode that may be useful in developing long-lasting and fast-charging batteries.展开更多
Sunlight-powered water splitting presents a promising strategy for converting intermittent and virtually unlimited solar energy into energy-dense and storable green hydrogen.Since the pioneering discovery by Honda and...Sunlight-powered water splitting presents a promising strategy for converting intermittent and virtually unlimited solar energy into energy-dense and storable green hydrogen.Since the pioneering discovery by Honda and Fujishima,considerable efforts have been made in this research area.Among various materials developed,Ga(X)N/Si(X=In,Ge,Mg,etc.)nanoarchitecture has emerged as a disruptive semiconductor platform to split water toward hydrogen by sunlight.This paper introduces the characteristics,properties,and growth/synthesis/fabrication methods of Ga(X)N/Si nanoarchitecture,primarily focusing on explaining the suitability as an ideal platform for sunlight-powered water splitting toward green hydrogen fuel.In addition,it exclusively summarizes the recent progress and development of Ga(X)N/Si nanoarchitecture for photocatalytic and photoelectrochemical water splitting.Moreover,it describes the challenges and prospects of artificial photosynthesis integrated device and system using Ga(X)N/Si nanoarchitectures for solar water splitting toward hydrogen.展开更多
To explore advanced cathode materials for lithium ion batteries(LIBs),a nanoarchitectured LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)(LNCM)material is developed using a modified carbonate coprecipitation method in combination wit...To explore advanced cathode materials for lithium ion batteries(LIBs),a nanoarchitectured LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)(LNCM)material is developed using a modified carbonate coprecipitation method in combination with a vacuum distillation-crystallisation process.Compared with the LNCM materials produced by a traditional carbonate copre-cipitation method,the prepared LNCM material synthesized through this modified method reveals a better hexago-nal layered structure,smaller particle sizes(ca.110.5 nm),and higher specific surface areas.Because of its unique structural characteristics,the as-prepared LNCM material demonstrates excellent electrochemical properties in-cluding high rate capability and good cycleability when it is utilized as a cathode in the lithium ion battery(LIB).展开更多
基金Project supported by the National Natural Science Foundation of China(Grant No.11874027)the China Postdoctoral Science Foundation(Grant Nos.2019T120233 and 2017M621198)
文摘Manipulating the self-assembly of transition metal telluride nanocrystals(NCs) creates opportunities for exploring new properties and device applications. Iron ditelluride(FeTe2) has recently emerged as a new class of magnetic semiconductor with three-dimensional(3D) magnetic ordering and narrow band gap structure, yet the self-assembly of FeTe2 NCs has not been achieved. Herein, the tree-like FeTe2 nanoarchitectures with orthorhombic crystal structure have been successfully synthesized by hot-injection solvent thermal approach using phosphine-free Te precursor. The morphology, size, and crystal structure have been investigated using transmission electron microscopy(TEM), high-resolution TEM(HRTEM),and powder x-ray diffraction(XRD). We study the formation process of tree-like FeTe2 NCs according to trace the change of the sample morphology with the reaction time. It was found that the FeTe2 nanoparticles show oriented aggregation and self-assembly behavior with the increase of reaction time, which is attributed to size-dependent magnetism properties of the samples. The magnetic interaction is thought to be the driving force of nanoparticle self-organization.
基金supported by JSPS KAKENHI(Grant number 24K15389)S.C.Kim greatly acknowledges the Basic Science Research Program through the National Research Foundation of Korea(NRF)funded by the Ministry of Education of the Republic of Korea(2020R1I1A3052258)for financial support.
文摘Surface area,pore properties,synergistic behavior,homogenous dispersion,and interactions between carbon matrix and metal-nanostructures are the key factors for achieving the better performance of carbon-metal based(electro)catalysts.However,the traditional hydro-or solvothermal preparation of(electro)catalysts,particularly,bi-or tri-metallic nanostructures anchored graphene(G)or carbon nanotubes(CNTs),often pose to poor metal–support interaction,low synergism,and patchy dispersion.At first,bimetallic flower-like-CuFeS_(2)/NG and cube-like-NiFeS_(2)/NCNTs nanocomposites were prepared by solvothermal method.The resultant bimetallic nanocomposites were employed to derive the 2D-nano-sandwiched Fe_(2)CuNiS_(4)/NGCNTs-SW(electro)catalyst by a very simple and green urea-mediated“mix-heat”method.The desired physicochemical properties of Fe_(2)CuNiS_(4)/NGCNTs-SW such as multiple active sites,strong metal-support interaction,homogenous dispersion and enhanced surface area were confirmed by various microscopic and spectroscopic techniques.To the best of our knowledge,this is the first urea-mediated“mix-heat”method for preparing 2D-nano-sandwiched carbon-metal-based(electro)catalysts.The Fe_(2)CuNiS_(4)/NGCNTs-SW was found to be highly effective for alkaline-mediated oxygen evolution reaction at low onset potential of 284.24 mV,and the stable current density of 10 mA cm^(−2) in 1.0 m KOH for 10 h.Further,the Fe_(2)CuNiS_(4)/NGCNTs-SW demonstrated excellent catalytic activity in the reduction of 4-nitrophenol with good kapp value of 87.71×10^(−2)s^(-1)and excellent reusability over five cycles.Overall,the developed urea-mediated“mix-heat”method is highly efficient for the preparation of metal-nanoarchitectures anchored 2D-nano-sandwiched(electro)catalysts with high synergism,uniform dispersion and excellent metal-support interaction.
基金supported by the National Research Foundation(NRF-2020R1C1C1012655 NRF-2020K1A3A7A09078095,and NRF2021R1A4A5030513,M.Y.)also supported by grants from the National Research Foundation of Korea(2020R1A2C1101561 and 2021M3F6A1085886,M.J.K.)。
文摘The development of urbanization and industrialization leads to rapid depletion of fossil fuels.Therefore,the production of fuel from renewable resources is highly desired.Electrotechnical energy conversion and storage is a benign technique with reliable output and is eco-friendly.Developing an exceptional electrochemical catalyst with tunable properties like a huge specific surface area,porous channels,and abundant active sites is critical points.Recently,Metal-organic frameworks(MOFs)and two-dimensional(2D)transition-metal carbides/nitrides(MXenes)have been extensively investigated in the field of electrochemical energy conversion and storage.However,advances in the research on MOFs are hampered by their limited structural stability and conventionally low electrical conductivity,whereas the practical electrochemical performance of MXenes is impeded by their low porosity,inadequate redox sites,and agglomeration.Consequently,researchers have been designing MOF/MXene nanoarchitectures to overcome the limitations in electrochemical energy conversion and storage.This review explores the recent advances in MOF/MXene nanoarchitectures design strategies,tailoring their properties based on the morphologies(0D,1D,2D,and 3D),and broadening their future opportunities in electrochemical energy storage(batteries,supercapacitors)and catalytic energy conversion(HER,OER,and ORR).The intercalation of MOF in between the MXene layers in the nanoarchitectures functions synergistically to address the issues associated with bare MXene and MOF in the electrochemical energy storage and conversion.This review gives a clear emphasis on the general aspects of MOF/MXene nanoarchitectures,and the future research perspectives,challenges of MOF/MXene design strategies and electrochemical applications are highlighted.
基金supported by the National Natural Science Foundation of China(61974125)the Open Innovation Fund for undergraduate students of Xiamen University(KFJJ-202411).
文摘Semiconductor photocatalysis holds great promise for renewable energy generation and environment remediation,but generally suffers from the serious drawbacks on light absorption,charge generation and transport,and structural stability that limit the performance.The core-shell semiconductorgraphene(CSSG)nanoarchitectures may address these issues due to their unique structures with exceptional physical and chemical properties.This review explores recent advances of the CSSG nanoarchitectures in the photocatalytic performance.It starts with the classification of the CSSG nanoarchitectures by the dimensionality.Then,the construction methods under internal and external driving forces were introduced and compared with each other.Afterward,the physicochemical properties and photocatalytic applications of these nanoarchitectures were discussed,with a focus on their role in photocatalysis.It ends with a summary and some perspectives on future development of the CSSG nanoarchitectures toward highly efficient photocatalysts with extensive application.By harnessing the synergistic capabilities of the CSSG architectures,we aim to address pressing environmental and energy challenges and drive scientific progress in these fields.
基金support provided by the International Cooperation Project of Jilin Province,China(20230402055GH)the Natural Science Foundation of Jilin Province,China(No.20250102092JC)the Key R&D Project on Functional Development of Major Research Instruments of Jilin Province,China(No.20250206056ZP).
文摘To address the sluggish kinetics and limited current density in the alkaline hydrogen evolution reaction(HER),we designed and synthesized dandelion-like V-doped CoP anchored on carbon cloth(V-CoP-X)via a MOF-derived strategy involving hydrothermal growth and subsequent phosphidation.By precisely controlling the V content in the MOF precursor,we achieve tunable morphologies of V-CoP materials.Experimental analyses reveal that Lewis acid sites of V promote electron transfer and adjust the d-band centers of V-CoP.According to the results of experimental and density functional theory(DFT)calculations,the V-doped CoP lowers the water dissociation energy in alkaline media and optimizes the adsorption energy for H^(*)(ΔG_(H^(*))).These synergistic effects accelerate water dissociation kinetics as well as optimize adsorption and desorption behavior of H^(*),leading to improved HER activity in 1 M KOH and 0.5 M H_(2)SO_(4).As a result,the optimal V-CoP electrode exhibits exceptional HER performance in diverse electrolytes,requiring low overpotentials of 69,63 and 89 mV to obtain 10 mA cm^(-2)as well as 212,254 and 401 mV at 500 mA cm^(-2)in 1 M KOH,1 M KOH+0.5 M NaCl and 0.5 M H_(2)SO_(4),respectively.Remarkably,V-doped CoP possesses excellent long-term stability at large current density.This work presents a highperformance HER electrocatalyst while providing fundamental insights into the role of V doping in enhancing reaction kinetics.
基金supported by the National Natural Science Foundation of China(no.91961119)the Natural Science Foundation of Tianjin(no.S20YB26121).
文摘Zn-air batteries(ZABs)have been widely studied due to their high theoretical energy density,low cost,and high safety.However,the lack of efficient bifunctional electrocatalysts toward both the oxygen reduction reaction(ORR)and oxygen evolution reaction(OER)hinders their large-scale application.Herein,a dendritic NiS_(2)@Co-N-C/CNF nanoarchitecture is proposed.
基金supported by the Natural Science Foundation of China(52033007 and U22A20161)the National Postdoctoral Program for Innovative Talents(BX20180264)+5 种基金China Postdoctoral Science Foundation(2018M643519)Sichuan Science and Technology Program(2023JDRC0028)Chengdu Science and Technology Project(2022-YF05-01966-SN)Shenzhen High-tech Zone Development Special Plan Pingshan District Innovation Platform Construction Project(29853MKCJ202300208)the Frontiers Medical Center,Tianfu Jincheng Laboratory Foundation(TFJC2023010008)the Fundamental Research Funds for the Central Universities(2682023ZTPY045).
文摘The emergence of antibiotic-resistant bacteria has become a major threat to global public health and has prompted the discovery of antibiotic alternatives.Natural antimicrobial peptides(AMPs)confer a unique non-specific membrane rupture mechanism,showing great potential in killing drug-resistant bacteria.However,natural AMPs have certain weaknesses,including stability and toxicity issues,which seriously hinder their in vivo applications.Synthetic AMPs possess similar characteristics to natural AMPs,including positive charges,amphiphilicity,and the ability to fold into diverse secondary structures.These properties are essential for AMPs penetration into membranes,allowing them to exhibit antimicrobial effects.Moreover,supramolecular self-assembly,facilitated by hydrophobic interaction,hydrogen bonding,π-πstacking,and electrostatic interaction,can generate nanoparticles,nanotubes,nanofibers,and hydrogels with well-defined nanoarchitectures.Utilizing peptide self-assembly to form various nanoarchitectures is an effective approach for generating antibacterial nanomaterials,offering potential advantages such as enhanced antibacterial properties,improved stability,and reduced cytotoxicity.This review highlights recent advancements in tailoring supramolecular AMPs to create diverse nano-architectures for combating infectious diseases.
基金the National Natural Science Foundation of China(Grant No.21405105)the Shanghai Natural Science Foundation(14ZR1429300)the State Key Laboratory of Green Catalysis of Sichuan Institutes of Higher Education(LZJ1703).
文摘To construct supercapacitors(SCs)with high-efficient electrochemical properties,the morphology and structure of applied electrode materials are the key factors.Herein,three-dimensional(3D)sea urchin-like MnCo_(2)O_(4)nanoarchitectures grown on Ni foam(NF)were successfully synthesized via a simple solvothermal method and subsequent annealing treatment.Electrochemical tests revealed that the area specific capacitances of the MnCo_(2)O_(4)electrode and the corresponding assembled asymmetric device can achieve 1634 and 522 mF·cm^(-2),respectively.When the power density of the assembled asymmetric supercapacitor(ASC)is 2.25 mW·cm^(-2),the maximum energy density can reach 0.163 mW·h·cm^(-2).After 5500 cycles of long-term stability test,the capacity retention rate maintains 91.7%.The excellent electrochemical performance can be mainly ascribed to the unique nanostructure of the material,which provides a great quantity of electroactive sites for Faraday redox reactions as well as accelerates the process of the ions/electrons transport.This work provides a certain reference value for the preparation of MnCo_(2)O_(4)electrode with novel structure and excellent electrochemical performance for SCs.
基金Element Resources,LLC,and Shell through UHETI,funded part of this work
文摘NiMo-based nanostructures are among the most active hydrogen evolution reaction(HER)catalysts under an alkaline environment due to their strong water dissociation ability.However,these nanostructures are vulnerable to the destructive effects of H_(2) production,especially at industry-standard current densities.Therefore,developing a strategy to improve their mechanical strength while maintaining or even further increasing the activity of these nanocatalysts is of great interest to both the research and industrial communities.Here,a hierarchical interconnected NiMoN(HW-NiMoN-2h)with a nanorod-nanowire morphology was synthesized based on a rational combination of hydrothermal and water bath processes.HW-NiMoN-2h is found to exhibit excellent HER activity due to the accomodation of abundant active sites on its hierarchical morphology,in which nanowires con-nect free-standing nanorods,concurrently strengthening its structural stability to withstand H_(2) production at 1 A cm^(−2).Seawater is an attractive feedstock for water electrolysis since H_(2) generation and water desalination can be addressed simultaneously in a single process.The HER performance of HW-NiMoN-2h in alkaline seawater suggests that the presence of Na+ions interferes with the reation kinetics,thus lowering its activity slightly.However,benefiting from its hierarchical and interconnected characteristics,HW-NiMoN-2h is found to deliver outstanding HER activity of 1 A cm^(−2) at 130 mV overpotential and to exhibit excellent stability at 1 A cm^(−2) over 70 h in 1 M KOH seawater.
基金supported by National Natural Science Foundation of China(No.52177014,52273257,51977009,11774027,51372282,and 51132002).
文摘Advanced electromagnetic devices,as the pillars of the intelligent age,are setting off a grand transformation,redefining the structure of society to present pluralism and diversity.However,the bombardment of electromagnetic radiation on society is also increasingly serious along with the growing popularity of"Big Data".Herein,drawing wisdom and inspiration from nature,an eco-mimetic nanoarchitecture is constructed for the first time,highly integrating the advantages of multiple components and structures to exhibit excellent electromagnetic response.Its electromagnetic properties and internal energy conversion can be flexibly regulated by tailoring microstructure with oxidative molecular layer deposition(oMLD),providing a new cognition to frequency-selective microwave absorption.The optimal reflection loss reaches≈−58 dB,and the absorption frequency can be shifted from high frequency to low frequency by increasing the number of oMLD cycles.Meanwhile,a novel electromagnetic absorption surface is designed to enable ultra-wideband absorption,covering almost the entire K and Ka bands.More importantly,an ingenious self-powered device is constructed using the eco-mimetic nanoarchitecture,which can convert electromagnetic radiation into electric energy for recycling.This work offers a new insight into electromagnetic protection and waste energy recycling,presenting a broad application prospect in radar stealth,information communication,aerospace engineering,etc.
基金supported by MOE under AcRF Tier 2(ARC 19/15,No.MOE2014-T2-2-093,MOE2015T2-2-057,MOE2016-T2-2-103,MOE2017-T2-1-162)and AcRF Tier 1(2016-T1-001-147,2016-T1-002-051,2017-T1001-150,2017-T1-002-119)NTU under Start-Up Grant(M4081296.070.500000)in Singapore.
文摘Semiconductor nanomaterial-based epitaxial heterostructures with precisely controlled compositions and morphologies are of great importance for various applications in optoelectronics,thermoelectrics,and catalysis.Until now,various kinds of epitaxial heterostructures have been constructed.In this minireview,we will first introduce the synthesis of semiconductor nanomaterial-based epitaxial heterostructures by wet-chemical methods.Various architectures based on different kinds of seeds or templates are illustrated,and their growth mechanisms are discussed in detail.Then,the applications of epitaxial heterostructures in optoelectronics,catalysis,and thermoelectrics are described.Finally,we provide some challenges and personal perspectives for the future research directions of semiconductor nanomaterial-based epitaxial heterostructures.
基金National Natural Science Foundation of China,Grant/Award Numbers:21974007,U1930401 and U1530402。
文摘Rare-earth sulfides are of research interest for lithium-ion batteries(LIBs)due to their abundant lithium intercalation sites and low redox voltage.However,their electrochemical performances are not satisfactory because of poor conductivity and volume change upon electrochemical cycling.Herein,nanoarchitectures ofγ-Ce_(2)S_(3)encapsulated in a hollow mesoporous carbon nanosphere(Ce_(2)S_(3)@HMCS)are fabricated using the self-template strategy combined with the in-sphere sulfuration method and tested as an LIB anode.The void space between the Ce_(2)S_(3)core and the outer layer of the carbon nanosphere has been properly designed and modulated to achieve excellent electrochemical performance in terms of electronic conductivity,reversibility,and rate capability.The reversible capacity of Ce_(2)S_(3)@HMCS is 2.6 times that of the pure Ce_(2)S_(3)anode,which can gradually increase and maintain a capacity of 282 mAh·g^(−1)at a current density of 1 A·g^(-1),and a high Coulombic efficiency(~100%)can be achieved even after 1000 cycles.This good performance is attributed to the unique yolk-shell nanostructure with a highly crystallized and stable Ce3S2 core and volume expansion buffer space upon lithiation/delithiation.Ex situ X-ray diffraction and nuclear magnetic resonance results indicate that the lithiation of Ce_(2)S_(3)@HMCS is an intercalation process.This study represents an important advancement in precise structural design with in-sphere sulfuration and sheds light on a potential direction for highperformance lithium storage.
基金funding from Marie Curie Actions under EU FP7 Initial Training Network SNAL 608184
文摘One of the major challenges faced by the biomedical industry is the development of robust synthetic surfaces that can resist bacterial colonization.Much inspiration has been drawn recently from naturally occurring mechano-bactericidal surfaces such as the wings of cicada(Psaltoda claripennis)and dragonfly(Diplacodes bipunctata)species in fabricating their synthetic analogs.However,the bactericidal activity of nanostructured surfaces is observed in a particular range of parameters reflecting the geometry of nanostructures and surface wettability.Here,several of the nanometer-scale characteristics of black silicon(bSi)surfaces including the density and height of the nanopillars that have the potential to influence the bactericidal efficiency of these nanostructured surfaces have been investigated.The results provide important evidence that minor variations in the nanoarchitecture of substrata can substantially alter their performance as bactericidal surfaces.
基金financially supported by the National Natural Science Foundation of China(Grant No.52072371,51871209)Key Technologies Research and Development Program of Anhui Province(202004a06020056)+2 种基金Special Foundation of President of HFIPS(No.YZJJ202102)HFIPS Director’s Fund(No.GGZX-GTCX-2023-07,YZJJ-GGZX-2022-01)HFIPS Director’s Fund(No.2023YZGH05)。
文摘Hydrogenation of aromatic rings can be used not only for synthesis of fine chemicals,but also for hydrogen storage and transportation using organic hydrides.In this paper,a yolk–shell structured SiO_(2)@Ru@NC catalyst,which was successfully synthesized by a strategy combining a modified Stöber method and vacuum-assisted impregnation,revealed excellent catalytic activity in dimethyl terephthalate(DMT)hydrogenation to dimethyl 1,4-cyclohexanedicarboxylate(DMCD),which is a green chemical reagent and precursor for high-value chemicals.Characterization results showed that highly dispersed Ru NPs with subnanometer size distribution were encapsulated in the yolk–shell nanoarchitecture and the mesoporous shell could ensure unhindered diffusion of reactant molecules.Moreover,yolk–shell structure-induced interaction of Ru and the carbon shell allowed for tuning the electronic structure of the Ru species,which in turn could regulate the catalytic properties.The yolk–shell nanoarchitecture catalyst offers advantages of low active metal loading,and excellent activity and stability,and thus can expand applications of ultra-low loaded precious metal catalysts in catalytic conversion of aromatic compounds.
基金supported by the National Natural Science Foundation of China(No.11872171 and 51802077)the Fundamental Research Funds for the Central Universities(No.B210202093).
文摘2D MXene nanosheets are regarded as promising cathode catalysts towards the hydrogen evolution reaction (HER), while their overall electrocatalytic ability still needs to be optimized before the practical application. In this contribution, we put forward a controllable assembly approach for constructing a heterostructured nanoarchitecture made from ultrafine MoS_(2) quantum dot-decorated Ti_(3)C_(2)T_(x) MXene nanosheets (MQDs/Ti_(3)C_(2)T_(x)). Benefiting from the remarkable structural features of the ultrathin catalyst layers, homogeneous MoS_(2) distribution, optimized electronic structure, and good electron conductivity, the resulting MQD/Ti_(3)C_(2)T_(x) catalyst exhibits superior HER properties with a low onset potential of 66 mV, a small Tafel slope of 74 mV dec^(-1), and a long lifespan, in contrast to the insufficient HER ability for bare MoS_(2) quantum dots and Ti_(3)C_(2)T_(x) itself. DFT calculations further disclose the optimized band structure of the MQDs/Ti_(3)C_(2)T_(x) model with numerous diverse active sites, which play fundamental roles in boosting the HER kinetics.
基金financially supported by the National Natural Science Foundation of China(21972068)the High-level Talents Project of Jinling Institute of Technology(jit-b-202164)the Nantong University Scientific Research Foundation for the Introduced Talents(No.03081220).
文摘Exploring economical,high-efficiency and durable electrocatalysts for the oxygen evolution reaction(OER)is of critical importance for the advancement of sustainable energy conversion technologies,including water electrolysis and metal–air batteries.Compositional manipulation via heteroatom-doping and nanoarchitectural design of Earth-abundant electrocatalysts are extensively established as valid strategies to effectively optimize the electrocatalytic performance due to the electronic modulation and geometric effect.
基金financially supported by the National Natural Science Foundation of China (51774145,51872317 and 21835007)China Postdoctoral Science Foundation (2019M661644)China Scholarship Council (CSC) for financial support。
文摘Solar-driven photoelectrochemical(PEC) water splitting is a promising technology for sustainable hydrogen production, which relies on the development of efficient and stable photoanodes for water oxidation reaction. The thickness and microstructure of semiconductor films are generally crucial to their PEC properties. Herein, three-dimensional(3D) interconnected nanoporous Ta3N5 film photoanodes with controlled thickness were successfully fabricated via galvanostatic anodization and NH3 nitridation. The porous Ta3N5 nanoarchitectures(NAs) of 900 nm in thickness showed the highest PEC performance due to the optimal lightharvesting and charge separation. Compared with the holeinduced photocorrosion, the electrochemical oxidation at high anodic potentials resulted in severer performance degradation of Ta3N5. Although the surface oxide layer on deteriorated Ta3N5 photoanodes could be removed by NH3 re-treatment,the PEC performance was only partially recovered. As an alternative, anchoring a dual-layer Co(OH)x/Co OOH co-catalyst shell on the porous Ta3N5 NAs demonstrated substantially enhanced PEC performance and stability. Overall, this work provides reference to controllably fabricate 3D nanoporous Ta3N5-based photoanodes for efficient and stable PEC water splitting via optimizing the light absorption, hole extraction,charge separation and utilization.
基金This research was supported financially by the National Natural Science Foundation of China （NSFC） （Nos. 51672315, U1301242, 21271190, and 21403106）, the government of Guangzhou city for an international joint-project （No. 201704030020）, the Government of Guangdong Province for NSF （No. S2012020011113） and the provincial Ministry of Cooperative funded special funds （Nos. 2013A090100010, 2016B090932005, and 2015B090927002）, the Fundamental Research Funds for the Central Universities （No. 161gpy18）. The authors acknowledge Prof. Hong Jin Fan from Nanyang Technological University for helpful discussions.
文摘Nanostructured TiO2 has applications in solar cells, photocatalysts, and fast- charging, safe lithium ion batteries （LIBs）. To meet the demand of high-capacity and high-rate LIBs with TiO2-based anodes, it is important to fine-tune the nanoarchitecture using a well-controlled synthesis approach. Herein, we report a new approach that involves epitaxial growth combined with topotactic conversion to synthesize a unique type of three-dimensional （3D） TiO2 nano- architecture that is assembled by well-oriented ultrathin nanobelts. The whole nanoarchitecture displays a 3D Chinese knot-like morphology; the core consists of robust perpendicular interwoven nanobelts and the shell is made of extended nanobelts. The nanobelts oriented in three perpendicular [001]A directions facilitate Li＋ penetration and diffusion. Abundant anatase/TiO2-B interfaces provide a large amount of interfacial pseudocapacitance. A high and stable capacity of 130 mA.h.g-1 was obtained after 3,000 cycles at 10 A·g-1 （50 C）, and the high-rate property of our material was greater than that of many recently reported high-rate TiO2 anodes. Our result provides, not only a novel synthesis strategy, but also a new type of 3D anatase TiO2 anode that may be useful in developing long-lasting and fast-charging batteries.
基金supported by the National Natural Science Foundation of China(Grant No.22109095)the Shanghai Pilot Program for Basic Research-Shanghai Jiao Tong University(21TQ1400211)+1 种基金the Oceanic Interdisciplinary Program of Shanghai Jiao Tong University(SL2022MS007)the Natural Science and Engineering Research Council of Canada(NSERC)Discovery Grant Program.
文摘Sunlight-powered water splitting presents a promising strategy for converting intermittent and virtually unlimited solar energy into energy-dense and storable green hydrogen.Since the pioneering discovery by Honda and Fujishima,considerable efforts have been made in this research area.Among various materials developed,Ga(X)N/Si(X=In,Ge,Mg,etc.)nanoarchitecture has emerged as a disruptive semiconductor platform to split water toward hydrogen by sunlight.This paper introduces the characteristics,properties,and growth/synthesis/fabrication methods of Ga(X)N/Si nanoarchitecture,primarily focusing on explaining the suitability as an ideal platform for sunlight-powered water splitting toward green hydrogen fuel.In addition,it exclusively summarizes the recent progress and development of Ga(X)N/Si nanoarchitecture for photocatalytic and photoelectrochemical water splitting.Moreover,it describes the challenges and prospects of artificial photosynthesis integrated device and system using Ga(X)N/Si nanoarchitectures for solar water splitting toward hydrogen.
基金supported by the Science and Technology Pillar Program of Sichuan Province(2014GZ0077)the Youth Foundation of Sichuan University(No.2011SCU11081)+1 种基金the Doctoral Program of Higher Education of China(No.20120181120103)the Open Found of National Engineering Center for Phosphorus Chemical Industry(2013LF1012).
文摘To explore advanced cathode materials for lithium ion batteries(LIBs),a nanoarchitectured LiNi_(1/3)Co_(1/3)Mn_(1/3)O_(2)(LNCM)material is developed using a modified carbonate coprecipitation method in combination with a vacuum distillation-crystallisation process.Compared with the LNCM materials produced by a traditional carbonate copre-cipitation method,the prepared LNCM material synthesized through this modified method reveals a better hexago-nal layered structure,smaller particle sizes(ca.110.5 nm),and higher specific surface areas.Because of its unique structural characteristics,the as-prepared LNCM material demonstrates excellent electrochemical properties in-cluding high rate capability and good cycleability when it is utilized as a cathode in the lithium ion battery(LIB).
