Blue calico,which dates back more than 800 years,is a traditional blue-and-white-printed fabric in Nantong,a city in East China's Jiangsu Province.Blue calico is renowned for its simple,yet elegant,patterns,the st...Blue calico,which dates back more than 800 years,is a traditional blue-and-white-printed fabric in Nantong,a city in East China's Jiangsu Province.Blue calico is renowned for its simple,yet elegant,patterns,the striking beauty of its blue-and-white harmony and,especially,for its printing and dyeing being performed by hand.展开更多
Thermally activated delayed fluorescence(TADF)exciplexes,constituted of donor-acceptor moieties,have garnered mounting interest because of their promising potential to obtain high-performance electroluminescent device...Thermally activated delayed fluorescence(TADF)exciplexes,constituted of donor-acceptor moieties,have garnered mounting interest because of their promising potential to obtain high-performance electroluminescent devices.However,the moderate reverse intersystem crossing(RISC)of current reported exciplex systems and the lack of clear molecular design concepts to improve this situation have distinctly hindered the further use of exciplexes in organic light-emitting diodes(OLEDs).Herein,we conduct an exploration of exciplex systems founded upon[2,2]paracyclophane(PCP)-containing donor molecules and a triazine acceptor,which exhibit very fast RISC processes with a rate constant(k_(RISC))up to 8.3×10^(6) s^(-1)benefiting from the efficient interactions between the donor and acceptor fragments induced by the peripheral spatial-blocking of PCP group.Utilizing these deep-blue exciplexes as hosts and a multiple resonance(MR)molecule as emitter,pure-blue narrowband OLEDs with CIE coordinates of(0.124,0.137),a full-width at half-maximum(FWHM)of 23 nm,and a high external quantum efficiency(EQE)of around 30%are accessed.This study paves the way for developing blue OLEDs using PCP-based exciplex materials with an enhanced RISC process.展开更多
Cryptochromes(CRYs)are photolyase-like bluelight receptors originally identified in Arabidopsis thaliana(Arabidopsis)and have since been identified across diverse evolutionary lineages.Cryptochromes not only transduce...Cryptochromes(CRYs)are photolyase-like bluelight receptors originally identified in Arabidopsis thaliana(Arabidopsis)and have since been identified across diverse evolutionary lineages.Cryptochromes not only transduce blue-light cues to the circadian clock but also maintain the temperature compensation of circadian clock.However,the precise mechanism by which CRYs integrate blue light signals into the circadian clock in Arabidopsis is still under investigation.This study revealed that,when blue light was filtered out from white light,the circadian period length in Col-0 was extended,but not in the cry1 cry2double mutant.This indicates that both blue light and CRYs are crucial for regulating the circadian rhythm.Furthermore,we discovered that CRY2 interacted with PSEUDORESPONSE REGULATOR 5(PRR5),a key component of the circadian clock under blue light,which suppressed PRR5's transcriptional inhibition ability on CCA1 and LHY.These findings illuminate the pathway through which blue light influences the circadian clock via the CRY2-PRR5 module.展开更多
Although manganese Prussian blue analogues(Mn-PBAs)offer advantages as cost-effective,high-energy-density cathode materials for sodium-ion batteries,their practical application is severely constrained by substantial c...Although manganese Prussian blue analogues(Mn-PBAs)offer advantages as cost-effective,high-energy-density cathode materials for sodium-ion batteries,their practical application is severely constrained by substantial capacity degradation during long-term cycling.This performance deterioration is closely associated with the structural instability of the material during the cycling process,which is mainly attributed to the gradual dissolution of the active material into the electrolyte and severe lattice distortion during Na+intercalation/deintercalation.Fortunately,the aforementioned challenges can be effectively addressed by fabricating an in situ engineered nickel cage(ISE-NC)on Mn-PBAs(denoted as Mn-PBAs-NC).Experimental characterization combined with theoretical calculations reveals that this spontaneously formed nickel cage not only suppresses the diffusion of Mn-PBAs into the electrolyte but also acts as a structural stabilizer,significantly alleviating lattice distortion during cycling.This dual stabilization mechanism ensures remarkable cycling stability,with Mn-PBAs-NC delivering a retained capacity of 96.4 mA h g^(−1)(80%capacity retention)over 2,300 cycles at 2 C,elevating the cycle life of Mn-PBAs to unprecedented levels.展开更多
英国作家立德夫人的民族志作品The Land of the Blue Gown有多个汉语无本回译译本。本文选取其中三个代表性译本,尝试从民族志翻译理论出发,通过对不同译本的语言风格传达和文化信息还原进行比较,总结各无本回译译本的翻译策略选择以及...英国作家立德夫人的民族志作品The Land of the Blue Gown有多个汉语无本回译译本。本文选取其中三个代表性译本,尝试从民族志翻译理论出发,通过对不同译本的语言风格传达和文化信息还原进行比较,总结各无本回译译本的翻译策略选择以及译者在各自翻译过程中扮演的不同角色,为民族志翻译相关研究作学理探讨。展开更多
In the heart of southern China,Nanning is set to host the 22nd China-ASEAN Expo(CAEXPO)from September 17 to 21,again turning the city into a global hub for trade,innovation,and economic cooperation.This year marks the...In the heart of southern China,Nanning is set to host the 22nd China-ASEAN Expo(CAEXPO)from September 17 to 21,again turning the city into a global hub for trade,innovation,and economic cooperation.This year marks the beginning of a new chapter in regional collaboration with the debut of the Blue Economy Pavilion—an exhibition space dedicated to the fast-growing and increasingly crucial marine economy.展开更多
Prussian blue/Prussian blue analogues(PB/PBAs)are widely used in electrochemistry and materials science fields,such as electrochemical energy storage,catalysis,water purification,and electromagnetic wave absorption,ow...Prussian blue/Prussian blue analogues(PB/PBAs)are widely used in electrochemistry and materials science fields,such as electrochemical energy storage,catalysis,water purification,and electromagnetic wave absorption,owing to their 3D open-framework structure,tunable composition,and large specific surface area.However,the co-precipitation method,which is most suitable for large-scale production of PB/PBAs,often leads to the formation of numerous crystal defects and severe lattice distortion,which significantly affects the structural stability of PB/PBAs.To obtain high-crystallinity PB/PBAs with targeted properties,precise synthesis considering various detailed conditions is especially needed.Herein,this review comprehensively summarizes the fundamental structure composition,key factors in synthesis,and applications in the electrochemistry of PB/PBAs.Unlike previous reports,this review elucidates the relationship between the physicochemical properties of PB/PBAs and their structural composition,with a particular focus on revealing the mechanisms and significance of specific preparation methods during the synthesis process,including reactant concentration,chelating agent,aging,atmosphere,temperature,and drying conditions,for achieving the precise fabrication of PB/PBAs nanomaterials.As PB/PBAs gradually become materials for multidimensional applications,we urge greater attention to the unique properties of PB/PBAs that are sustained by high crystallinity and stable crystal structures.This will effectively ensure the maximization of their advantages in practical applications.展开更多
Exploring modification methods for enhancing the adsorption performance of biochar-based adsorbents for effective removal of methylene blue(MB),biochar-loaded CeO_(2)nanoparticles(Ce/BC)were synthesized by pomelo peel...Exploring modification methods for enhancing the adsorption performance of biochar-based adsorbents for effective removal of methylene blue(MB),biochar-loaded CeO_(2)nanoparticles(Ce/BC)were synthesized by pomelo peels through co-precipitation combined with the pyrolysis method.Ce/BC showed a higher specific surface area and disorder degree than that of BC.The 0.5Ce/BC(mass ratio of Ce(NO_(3))_(3)·6H_(2)O/BC=0.5/1)showed the best performance to adsorption of MB solution at different reaction conditions(MB concentration,Ce/BC composites dosage,and initial pH).Adsorption kinetics and equilibrium isotherms were well-described with a pseudo-first-order equation and Langmuir model,respectively.In addition,the maximum adsorption capacity of 0.5Ce/BC for MB was 105.68 mg·g^(-1)at 328 K.The strong adsorption was attributed to multi-interactions including pore filling,π-πinteractions,electrostatic interaction,and hydrogen bonding between the composites and MB.This work demonstrated that the modified pomelo peels biochar,as a green promising material with cost-effectiveness,exhibited a great potential for broad application prospectively to dyeing-contaminated wastewater treatment.展开更多
By the random distribution of metals in a single phase,entropy engineering is applied to construct dense neighboring active centers with diverse electronic and geometric structures,realizing the continuous optimizatio...By the random distribution of metals in a single phase,entropy engineering is applied to construct dense neighboring active centers with diverse electronic and geometric structures,realizing the continuous optimization of multiple primary reactions for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).Many catalysts developed through entropy engineering have been built in nearly equimolar ratios to pursue high entropy,hindering the identification of the active sites and potentially diluting the concentration of real active sites while weakening their electronic interactions with reaction intermediates.Herein,this work proposes an entropy-engineering strategy in metal nanoparticle-embedded nitrogen carbon electrocatalysts,implemented by entropy-engineered Prussian blue analogs(PBA)as precursors to enhance the catalytic activity of primary Cu-Fe active sites.Through the introduction of the micro-strains driven by entropy engineering,density functional theory(DFT)calculations and geometric phase analysis(GPA)using Lorentz electron microscopy further elucidate the optimization of the adsorption/desorption of intermediates.Furthermore,the multi-dimensional morphology and the size diminishment of the nanocrystals serve to expand the electrochemical area,maximizing the catalytic activity for both ORR and OER.Notably,the Zn-air battery assembled with CuFeCoNiZn-NC operated for over 1300 h with negligible decay.This work presents a paradigm for the design of low-cost electrocatalysts with entropy engineering for multi-step reactions.展开更多
With the rapid development of new energy and the high proportion of new energy connected to the grid,energy storage has become the leading technology driving significant adjustments in the global energy landscape.Elec...With the rapid development of new energy and the high proportion of new energy connected to the grid,energy storage has become the leading technology driving significant adjustments in the global energy landscape.Electrochemical energy storage,as the most popular and promising energy storage method,has received extensive attention.Currently,the most widely used energy storage method is metal-ion secondary batteries,whose performance mainly depends on the cathode material.Prussian blue analogues(PBAs)have a unique open framework structures that allow quick and reversible insertion/extraction of metal ions such as Na^(+),K^(+),Zn^(2+),Li^(+)etc.,thus attracting widespread attention.The advantages of simple synthesis process,abundant resources,and low cost also distinguish it from its counterparts.Unfortunately,the crystal water and structural defects in the PBAs lattice that is generated during the synthesis process,as well as the low Na content,significantly affect their electrochemical performance.This paper focuses on PBAs’synthesis methods,crystal structure,modification strategies,and their potential applications as cathode materials for various metal ion secondary batteries and looks forward to their future development direction.展开更多
The technology of solid-state lighting has developed for decades in various industries.Phosphor,as an element part,determines the application domain of lighting products.For instance,blue and redemitting phosphors are...The technology of solid-state lighting has developed for decades in various industries.Phosphor,as an element part,determines the application domain of lighting products.For instance,blue and redemitting phosphors are required in the process of plant supplementing light,arrow-band emitting phosphors are applied to backlight displays,etc.In this work,a Bi^(3+)-activated blue phosphor was obtained in a symmetrical and co mpact crystal structure of Gd3Sb07(GSO).Then,the co-doping strategy of alkali metal ions(Li^(+),Na^(+),and K^(+))was used to optimize the performance.The result shows that the photoluminescence intensity is increased by 2.1 times and 1.3 times respectively by introducing Li~+and K^(+)ions.Not only that,it also achieves narrow-band emitting with the full width of half-maximum(FWHM)reaching 42 nm through Na^(+)doping,and its excitation peak position also shifts from 322 to 375 nm,which can be well excited by near-ultraviolet(NUV)light emitting diode(LED)chips(365 nm).Meanwhile,the electroluminescence spectrum of GSO:0.6 mol%Bi^(3+),3 wt%Na^(+)matches up to 93.39%of the blue part of the absorption spectrum of chlorophyll a.In summary,the Bi^(3+)-activated blue phosphor reported in this work can synchronously meet the requirements of plant light replenishment and field emission displays.展开更多
Aqueous zinc-ion batteries(AZIBs)show great potential in the field of electrochemical energy storage with the advantages of high safety,low cost and environmental friendliness.Prussian blue analogues(PBAs)are consider...Aqueous zinc-ion batteries(AZIBs)show great potential in the field of electrochemical energy storage with the advantages of high safety,low cost and environmental friendliness.Prussian blue analogues(PBAs)are considered as the highly promising cathode materials for AZIBs because of their low cost and high voltage potential.Its excellent electrochemical performance and sustainable energy storage capability provide a new direction and opportunity for the development of AZIBs technology.The practical application of PBAs in AZIBs,however,is restrained by its unstable cycle life deriving from PBAs’inherent structure deficiencies and its dissolution in aqueous electrolyte.Based on the summary of series of literature,we will comprehensively introduce the PBAs as cathodes for AZIBs in this review.Firstly,some basic knowledge of PBAs is introduced,including structural characteristics,advantages and issues.Secondly,several commonly used modification methods to improve the properties of PBAs,as well as electrolytes to stabilize PBAs,are presented.Finally,the future research directions and commercial prospects of PBAs in AZIBs are proposed to encourage further exploration and promote technological innovation.展开更多
Lithium-ion batteries(LIBs)have dominated the portable electronic and electrochemical energy markets since their commercialisation,whose high cost and lithium scarcity have prompted the development of other alkali-ion...Lithium-ion batteries(LIBs)have dominated the portable electronic and electrochemical energy markets since their commercialisation,whose high cost and lithium scarcity have prompted the development of other alkali-ion batteries(AIBs)including sodium-ion batteries(SIBs)and potassium-ion batteries(PIBs).Owing to larger ion sizes of Na^(+)and K^(+)compared with Li^(+),nanocomposites with excellent crystallinity orientation and well-developed porosity show unprecedented potential for advanced lithium/sodium/potassium storage.With enticing open rigid framework structures,Prussian blue analogues(PBAs)remain promising self-sacrificial templates for the preparation of various nanocomposites,whose appeal originates from the well-retained porous structures and exceptional electrochemical activities after thermal decomposition.This review focuses on the recent progress of PBA-derived nanocomposites from their fabrication,lithium/sodium/potassium storage mechanism,and applications in AIBs(LIBs,SIBs,and PIBs).To distinguish various PBA derivatives,the working mechanism and applications of PBA-templated metal oxides,metal chalcogenides,metal phosphides,and other nanocomposites are systematically evaluated,facilitating the establishment of a structure–activity correlation for these materials.Based on the fruitful achievements of PBA-derived nanocomposites,perspectives for their future development are envisioned,aiming to narrow down the gap between laboratory study and industrial reality.展开更多
The objective of this study is to propose an optimal plant design for blue hydrogen production aboard a liquefiednatural gas(LNG)carrier.This investigation focuses on integrating two distinct processes—steam methaner...The objective of this study is to propose an optimal plant design for blue hydrogen production aboard a liquefiednatural gas(LNG)carrier.This investigation focuses on integrating two distinct processes—steam methanereforming(SMR)and ship-based carbon capture(SBCC).The first refers to the common practice used to obtainhydrogen from methane(often derived from natural gas),where steam reacts with methane to produce hydrogenand carbon dioxide(CO_(2)).The second refers to capturing the CO_(2) generated during the SMR process on boardships.By capturing and storing the carbon emissions,the process significantly reduces its environmental impact,making the hydrogen production“blue,”as opposed to“grey”(which involves CO_(2) emissions without capture).For the SMR process,the analysis reveals that increasing the reformer temperature enhances both the processperformance and CO_(2) emissions.Conversely,a higher steam-to-carbon(s/c)ratio reduces hydrogen yield,therebydecreasing thermal efficiency.The study also shows that preheating the air and boil-off gas(BOG)before theyenter the combustion chamber boosts overall efficiency and curtails CO_(2) emissions.In the SBCC process,puremonoethanolamine(MEA)is employed to capture the CO_(2) generated by the exhaust gases from the SMR process.The results indicate that with a 90%CO_(2) capture rate,the associated heat consumption amounts to 4.6 MJ perkilogram of CO_(2) captured.This combined approach offers a viable pathway to produce blue hydrogen on LNGcarriers while significantly reducing the carbon footprint.展开更多
The scientific community has reached firm consensus that humans know less about the ocean than they do about the moon.Even though we have developed submersibles capable of diving to depths of ten thousand meters,our u...The scientific community has reached firm consensus that humans know less about the ocean than they do about the moon.Even though we have developed submersibles capable of diving to depths of ten thousand meters,our understanding of the oceans covering approximately 71 percent of the Earth’s surface remains scarce.A paper published in Science Advances last May noted that only 0.001 percent of the deep seafloor(190 meters or more below Earth’s surface)has been visually observed by scientists,yet this tiny fraction accounts for 95 percent of the total surface area of the oceans around the globe.展开更多
Marine pollution is a well-recognized phenomenon that has many negative effects on the marine environment.The effects of marine pollution are due to the discharge of hazardous materials,toxins,or other pollutants into...Marine pollution is a well-recognized phenomenon that has many negative effects on the marine environment.The effects of marine pollution are due to the discharge of hazardous materials,toxins,or other pollutants into the marine environment,which includes seas,estuaries,oceans,and other water bodies,and this unwanted input affects the blue economy.The blue economy,which includes industries and research associated with marine and ocean resources,is often affected by marine pollution on multiple levels,such as economic costs,direct resource impacts,health risks,and infrastructure damage.In one report,the pollution-related issues in many countries were estimated at 9 t/inh and clean-up costs between$12 to$160/t.More extensive pollution mitigation projects might take up to 15 years to conclude and cost up to$500/t.To better understand the role of marine pollution and its impact on the blue economy,some key parameters are discussed as follows:the role of biofouling,volatile organic compounds,the impact of metals,anionic pollutants,and antifouling coatings.The review findings also highlight the impact of marine pollution on ecosystems and associated economic activities,which could be reduced through measures such as better international cooperation,waste management,and the development of sustainable practices.Related information on the strategies and policies that could be adopted for sustainable blue economy are stated after each section.展开更多
ⅢThe superior adaptability of Prussian blue analogues(PBAs)in interacting with potassium ions has shifted research focus toward their potential application as cathodes of potassium-ion batteries(PIBs).The large inter...ⅢThe superior adaptability of Prussian blue analogues(PBAs)in interacting with potassium ions has shifted research focus toward their potential application as cathodes of potassium-ion batteries(PIBs).The large interstitial space formed between metal ions and–C≡N–in PBAs can accommodate large-radius K^(+).However,the rapid nucleation in the co-precipitation synthesis process of PBAs induces many lattice defects of[M(CN)_(6)]^(4-)vacancies(V_([M–C≡N])),interstitial and coordinated H_(2)O molecules,which will directly lead to performance degradation.Moreover,originating from various transition metal elements in low/high-spin electron configuration states,PBAs exhibit diverse electrochemical behaviors,such as low reaction kinetics of low-spin iron(Ⅱ),Jahn-Teller distortion and dissolution of manganese(Ⅲ),and electrochemical inertness of nickel(Ⅱ)and copper(Ⅱ).Here,we summarize recently reported structures and properties of PBAs,classifying them based on the types of transition metals(iron,cobalt,manganese,copper,nickel)employed.Advanced synthesis strategies,including control engineering of crystallinity based on H_(2)O molecules and V_([M–C≡N]),were discussed.Also,the approaches for enhancing the electrochemical performance of PBAs were highlighted.Finally,the challenges and prospects towards the future development of PBAs are put forward.The review is expected to provide technical and theoretical support for the design of high-performance PBAs.展开更多
The removal of cesium-137(^(137)Cs)from nuclear wastewater remains crucial due to its radioactivity and high solubility in water,which pose serious risk to human health and the environment.Aiming at selective capture ...The removal of cesium-137(^(137)Cs)from nuclear wastewater remains crucial due to its radioactivity and high solubility in water,which pose serious risk to human health and the environment.Aiming at selective capture of Cs^(+) from wastewater,a core-shell adsorbent,Prussian blue analog@y-alumina(PBA@Al_(2)O_(3))pellets were synthesized using the hydrothermal-stepwise deposition method.The coreshell PBA@Al_(2)O_(3)pellets showcased a PBA loading of 25%and demonstrated a maximum adsorption capacity of 15.65 mg·g^(-1).The adsorption data was consistent with the pseudo-second-order kinetic model and the Langmuir isotherm model.It effectively reduced bulk Cs^(+) concentrations from an initial 6.62 mg·L^(-1)to 2 μg·L^(-1),achieving a removal efficiency of 99.97%and distribution coefficient(Kd)of 1.265×10^(6)ml·g^(-1),surpassing the performance of other PBA-based materials.The material also indicated good mechanical properties and cesium ion removal rates of 99.7%across a wide pH range(1.82 to 11.12).Furthermore,PBA@Al_(2)O_(3)exhibited consistent removal rate of over 99%and good selectivity(SF=50-1600)towards Cs^(+) even in the presence of interfering ions such as Na^(+),K^(+),Mg^(2+),and Ca^(2+)ions.The Kd(Cs^(+))for PBA@Al2O3 in simulated seawater and groundwater were 9.92×10^(3)and 2.23×10^(4)ml·g^(-1),where the removal rates reached 96.1%and 98.2%,respectively.XPS confirms that the adsorption mechanism is the ion exchange between Cs^(+) and K^(+)ions.This study underscores the significant potential of inorganic core-shell pellets adsorbents as promising agents for the selective capture of Cs^(+) from wastewater.展开更多
文摘Blue calico,which dates back more than 800 years,is a traditional blue-and-white-printed fabric in Nantong,a city in East China's Jiangsu Province.Blue calico is renowned for its simple,yet elegant,patterns,the striking beauty of its blue-and-white harmony and,especially,for its printing and dyeing being performed by hand.
基金supported by the National Key R&D Program of China(2022YFE0109000)the National Natural Science Foundation of China(21975152,92256304,U23A20593)+1 种基金the China Postdoctoral Science Foundation(2022M722028)the Deutsche Forschungsgemeinschaft(DFG)under Germany’s Excellence Strategy(3DMM2O-EXC-2082/1-390761711)。
文摘Thermally activated delayed fluorescence(TADF)exciplexes,constituted of donor-acceptor moieties,have garnered mounting interest because of their promising potential to obtain high-performance electroluminescent devices.However,the moderate reverse intersystem crossing(RISC)of current reported exciplex systems and the lack of clear molecular design concepts to improve this situation have distinctly hindered the further use of exciplexes in organic light-emitting diodes(OLEDs).Herein,we conduct an exploration of exciplex systems founded upon[2,2]paracyclophane(PCP)-containing donor molecules and a triazine acceptor,which exhibit very fast RISC processes with a rate constant(k_(RISC))up to 8.3×10^(6) s^(-1)benefiting from the efficient interactions between the donor and acceptor fragments induced by the peripheral spatial-blocking of PCP group.Utilizing these deep-blue exciplexes as hosts and a multiple resonance(MR)molecule as emitter,pure-blue narrowband OLEDs with CIE coordinates of(0.124,0.137),a full-width at half-maximum(FWHM)of 23 nm,and a high external quantum efficiency(EQE)of around 30%are accessed.This study paves the way for developing blue OLEDs using PCP-based exciplex materials with an enhanced RISC process.
基金supported in part by the National Key R&D Program of China(2024YFA1306700)the National Natural Science Foundation of China(32330006,32150007,31825004,32200229,32170247)+1 种基金the Research Team Cultivation Program of Shenzhen University(2023DFT005to H.L.)the research fund from the Synthetic Biology Research Center of Shenzhen University。
文摘Cryptochromes(CRYs)are photolyase-like bluelight receptors originally identified in Arabidopsis thaliana(Arabidopsis)and have since been identified across diverse evolutionary lineages.Cryptochromes not only transduce blue-light cues to the circadian clock but also maintain the temperature compensation of circadian clock.However,the precise mechanism by which CRYs integrate blue light signals into the circadian clock in Arabidopsis is still under investigation.This study revealed that,when blue light was filtered out from white light,the circadian period length in Col-0 was extended,but not in the cry1 cry2double mutant.This indicates that both blue light and CRYs are crucial for regulating the circadian rhythm.Furthermore,we discovered that CRY2 interacted with PSEUDORESPONSE REGULATOR 5(PRR5),a key component of the circadian clock under blue light,which suppressed PRR5's transcriptional inhibition ability on CCA1 and LHY.These findings illuminate the pathway through which blue light influences the circadian clock via the CRY2-PRR5 module.
基金financially supported by the Ten-thousand Talents Programthe K. C. Wong Pioneer Talent Program+3 种基金China Three Gorges Corporation (WWKY-2021–0027)Inner Mongolia Science and Technology Plan (2021ZD0033)the National Natural Science Foundation of China (52202121)funded by China Petroleum&Chemical Corporation (123091)
文摘Although manganese Prussian blue analogues(Mn-PBAs)offer advantages as cost-effective,high-energy-density cathode materials for sodium-ion batteries,their practical application is severely constrained by substantial capacity degradation during long-term cycling.This performance deterioration is closely associated with the structural instability of the material during the cycling process,which is mainly attributed to the gradual dissolution of the active material into the electrolyte and severe lattice distortion during Na+intercalation/deintercalation.Fortunately,the aforementioned challenges can be effectively addressed by fabricating an in situ engineered nickel cage(ISE-NC)on Mn-PBAs(denoted as Mn-PBAs-NC).Experimental characterization combined with theoretical calculations reveals that this spontaneously formed nickel cage not only suppresses the diffusion of Mn-PBAs into the electrolyte but also acts as a structural stabilizer,significantly alleviating lattice distortion during cycling.This dual stabilization mechanism ensures remarkable cycling stability,with Mn-PBAs-NC delivering a retained capacity of 96.4 mA h g^(−1)(80%capacity retention)over 2,300 cycles at 2 C,elevating the cycle life of Mn-PBAs to unprecedented levels.
文摘英国作家立德夫人的民族志作品The Land of the Blue Gown有多个汉语无本回译译本。本文选取其中三个代表性译本,尝试从民族志翻译理论出发,通过对不同译本的语言风格传达和文化信息还原进行比较,总结各无本回译译本的翻译策略选择以及译者在各自翻译过程中扮演的不同角色,为民族志翻译相关研究作学理探讨。
文摘In the heart of southern China,Nanning is set to host the 22nd China-ASEAN Expo(CAEXPO)from September 17 to 21,again turning the city into a global hub for trade,innovation,and economic cooperation.This year marks the beginning of a new chapter in regional collaboration with the debut of the Blue Economy Pavilion—an exhibition space dedicated to the fast-growing and increasingly crucial marine economy.
基金financial support from the National Natural Science Foundation of China(NSFC,Grant No.52202253,52372193,and 22293041)Natural Science Foundation of Jiangsu Province(Grant No.BK20220914)Large Instrument and Equipment Sharing Fund of Nanjing University of Aeronautics and Astronautics。
文摘Prussian blue/Prussian blue analogues(PB/PBAs)are widely used in electrochemistry and materials science fields,such as electrochemical energy storage,catalysis,water purification,and electromagnetic wave absorption,owing to their 3D open-framework structure,tunable composition,and large specific surface area.However,the co-precipitation method,which is most suitable for large-scale production of PB/PBAs,often leads to the formation of numerous crystal defects and severe lattice distortion,which significantly affects the structural stability of PB/PBAs.To obtain high-crystallinity PB/PBAs with targeted properties,precise synthesis considering various detailed conditions is especially needed.Herein,this review comprehensively summarizes the fundamental structure composition,key factors in synthesis,and applications in the electrochemistry of PB/PBAs.Unlike previous reports,this review elucidates the relationship between the physicochemical properties of PB/PBAs and their structural composition,with a particular focus on revealing the mechanisms and significance of specific preparation methods during the synthesis process,including reactant concentration,chelating agent,aging,atmosphere,temperature,and drying conditions,for achieving the precise fabrication of PB/PBAs nanomaterials.As PB/PBAs gradually become materials for multidimensional applications,we urge greater attention to the unique properties of PB/PBAs that are sustained by high crystallinity and stable crystal structures.This will effectively ensure the maximization of their advantages in practical applications.
基金supported by Basic scientific research business expense project of colleges and universities directly under Inner Mongolia(2024QNJS127 and 2023QNJS131)Science and Technology Plan Program of Inner Mongolia Autonomous Region(2023YFDZ0031)the Inner Mongolia Natural Science Foundation(2024QN02011).
文摘Exploring modification methods for enhancing the adsorption performance of biochar-based adsorbents for effective removal of methylene blue(MB),biochar-loaded CeO_(2)nanoparticles(Ce/BC)were synthesized by pomelo peels through co-precipitation combined with the pyrolysis method.Ce/BC showed a higher specific surface area and disorder degree than that of BC.The 0.5Ce/BC(mass ratio of Ce(NO_(3))_(3)·6H_(2)O/BC=0.5/1)showed the best performance to adsorption of MB solution at different reaction conditions(MB concentration,Ce/BC composites dosage,and initial pH).Adsorption kinetics and equilibrium isotherms were well-described with a pseudo-first-order equation and Langmuir model,respectively.In addition,the maximum adsorption capacity of 0.5Ce/BC for MB was 105.68 mg·g^(-1)at 328 K.The strong adsorption was attributed to multi-interactions including pore filling,π-πinteractions,electrostatic interaction,and hydrogen bonding between the composites and MB.This work demonstrated that the modified pomelo peels biochar,as a green promising material with cost-effectiveness,exhibited a great potential for broad application prospectively to dyeing-contaminated wastewater treatment.
基金supported by the National Natural Science Foundation of China(52071083,52231007,12327804,52471224)Zhuhai Fudan Innovation Institute,and the Science and Technology Commission of Shanghai Municipality(23ZR1405000).
文摘By the random distribution of metals in a single phase,entropy engineering is applied to construct dense neighboring active centers with diverse electronic and geometric structures,realizing the continuous optimization of multiple primary reactions for oxygen reduction reaction(ORR)and oxygen evolution reaction(OER).Many catalysts developed through entropy engineering have been built in nearly equimolar ratios to pursue high entropy,hindering the identification of the active sites and potentially diluting the concentration of real active sites while weakening their electronic interactions with reaction intermediates.Herein,this work proposes an entropy-engineering strategy in metal nanoparticle-embedded nitrogen carbon electrocatalysts,implemented by entropy-engineered Prussian blue analogs(PBA)as precursors to enhance the catalytic activity of primary Cu-Fe active sites.Through the introduction of the micro-strains driven by entropy engineering,density functional theory(DFT)calculations and geometric phase analysis(GPA)using Lorentz electron microscopy further elucidate the optimization of the adsorption/desorption of intermediates.Furthermore,the multi-dimensional morphology and the size diminishment of the nanocrystals serve to expand the electrochemical area,maximizing the catalytic activity for both ORR and OER.Notably,the Zn-air battery assembled with CuFeCoNiZn-NC operated for over 1300 h with negligible decay.This work presents a paradigm for the design of low-cost electrocatalysts with entropy engineering for multi-step reactions.
基金supported by the National Natural Science Foundation of China(No.52072217)the National Key Research and Development Program of China(No.2022YFB3807700)+2 种基金the Joint Funds of the Hubei Natural Science Foundation Innovation and Development(No.2022CFD034)Hubei Natural Science Foundation Innovation Group Project(No.2022CFA020)the Major Technological Innovation Project of Hubei Science and Technology Department(No.2019AAA164).
文摘With the rapid development of new energy and the high proportion of new energy connected to the grid,energy storage has become the leading technology driving significant adjustments in the global energy landscape.Electrochemical energy storage,as the most popular and promising energy storage method,has received extensive attention.Currently,the most widely used energy storage method is metal-ion secondary batteries,whose performance mainly depends on the cathode material.Prussian blue analogues(PBAs)have a unique open framework structures that allow quick and reversible insertion/extraction of metal ions such as Na^(+),K^(+),Zn^(2+),Li^(+)etc.,thus attracting widespread attention.The advantages of simple synthesis process,abundant resources,and low cost also distinguish it from its counterparts.Unfortunately,the crystal water and structural defects in the PBAs lattice that is generated during the synthesis process,as well as the low Na content,significantly affect their electrochemical performance.This paper focuses on PBAs’synthesis methods,crystal structure,modification strategies,and their potential applications as cathode materials for various metal ion secondary batteries and looks forward to their future development direction.
基金Project supported by the Key R&D Projects in Hunan Province(2021SK2047,2022NK2044)Science and Technology Innovation Program of Hunan Province(2022WZ1022)Superior Youth Project of the Science Research Project of Hunan Provincial Department of Education(22B0211)。
文摘The technology of solid-state lighting has developed for decades in various industries.Phosphor,as an element part,determines the application domain of lighting products.For instance,blue and redemitting phosphors are required in the process of plant supplementing light,arrow-band emitting phosphors are applied to backlight displays,etc.In this work,a Bi^(3+)-activated blue phosphor was obtained in a symmetrical and co mpact crystal structure of Gd3Sb07(GSO).Then,the co-doping strategy of alkali metal ions(Li^(+),Na^(+),and K^(+))was used to optimize the performance.The result shows that the photoluminescence intensity is increased by 2.1 times and 1.3 times respectively by introducing Li~+and K^(+)ions.Not only that,it also achieves narrow-band emitting with the full width of half-maximum(FWHM)reaching 42 nm through Na^(+)doping,and its excitation peak position also shifts from 322 to 375 nm,which can be well excited by near-ultraviolet(NUV)light emitting diode(LED)chips(365 nm).Meanwhile,the electroluminescence spectrum of GSO:0.6 mol%Bi^(3+),3 wt%Na^(+)matches up to 93.39%of the blue part of the absorption spectrum of chlorophyll a.In summary,the Bi^(3+)-activated blue phosphor reported in this work can synchronously meet the requirements of plant light replenishment and field emission displays.
基金financially supported by the National Natural Science Foundation of China(Youth Program,Nos.52204378 and No.22309209)the Natural Science Foundation of Hunan Province in China(No.2023JJ40709).
文摘Aqueous zinc-ion batteries(AZIBs)show great potential in the field of electrochemical energy storage with the advantages of high safety,low cost and environmental friendliness.Prussian blue analogues(PBAs)are considered as the highly promising cathode materials for AZIBs because of their low cost and high voltage potential.Its excellent electrochemical performance and sustainable energy storage capability provide a new direction and opportunity for the development of AZIBs technology.The practical application of PBAs in AZIBs,however,is restrained by its unstable cycle life deriving from PBAs’inherent structure deficiencies and its dissolution in aqueous electrolyte.Based on the summary of series of literature,we will comprehensively introduce the PBAs as cathodes for AZIBs in this review.Firstly,some basic knowledge of PBAs is introduced,including structural characteristics,advantages and issues.Secondly,several commonly used modification methods to improve the properties of PBAs,as well as electrolytes to stabilize PBAs,are presented.Finally,the future research directions and commercial prospects of PBAs in AZIBs are proposed to encourage further exploration and promote technological innovation.
基金financial support from the Special Funds for the Cultivation of Guangdong College Students’Scientific and Technological Innovation(“Climbing Program”Special Funds,pdjh2023b0145)the Scientific Research Innovation Project of Graduate School of South China Normal University(2024KYLX047)financial support from the Australian Research Council,Centre for Materials Science,Queensland University of Technology.
文摘Lithium-ion batteries(LIBs)have dominated the portable electronic and electrochemical energy markets since their commercialisation,whose high cost and lithium scarcity have prompted the development of other alkali-ion batteries(AIBs)including sodium-ion batteries(SIBs)and potassium-ion batteries(PIBs).Owing to larger ion sizes of Na^(+)and K^(+)compared with Li^(+),nanocomposites with excellent crystallinity orientation and well-developed porosity show unprecedented potential for advanced lithium/sodium/potassium storage.With enticing open rigid framework structures,Prussian blue analogues(PBAs)remain promising self-sacrificial templates for the preparation of various nanocomposites,whose appeal originates from the well-retained porous structures and exceptional electrochemical activities after thermal decomposition.This review focuses on the recent progress of PBA-derived nanocomposites from their fabrication,lithium/sodium/potassium storage mechanism,and applications in AIBs(LIBs,SIBs,and PIBs).To distinguish various PBA derivatives,the working mechanism and applications of PBA-templated metal oxides,metal chalcogenides,metal phosphides,and other nanocomposites are systematically evaluated,facilitating the establishment of a structure–activity correlation for these materials.Based on the fruitful achievements of PBA-derived nanocomposites,perspectives for their future development are envisioned,aiming to narrow down the gap between laboratory study and industrial reality.
文摘The objective of this study is to propose an optimal plant design for blue hydrogen production aboard a liquefiednatural gas(LNG)carrier.This investigation focuses on integrating two distinct processes—steam methanereforming(SMR)and ship-based carbon capture(SBCC).The first refers to the common practice used to obtainhydrogen from methane(often derived from natural gas),where steam reacts with methane to produce hydrogenand carbon dioxide(CO_(2)).The second refers to capturing the CO_(2) generated during the SMR process on boardships.By capturing and storing the carbon emissions,the process significantly reduces its environmental impact,making the hydrogen production“blue,”as opposed to“grey”(which involves CO_(2) emissions without capture).For the SMR process,the analysis reveals that increasing the reformer temperature enhances both the processperformance and CO_(2) emissions.Conversely,a higher steam-to-carbon(s/c)ratio reduces hydrogen yield,therebydecreasing thermal efficiency.The study also shows that preheating the air and boil-off gas(BOG)before theyenter the combustion chamber boosts overall efficiency and curtails CO_(2) emissions.In the SBCC process,puremonoethanolamine(MEA)is employed to capture the CO_(2) generated by the exhaust gases from the SMR process.The results indicate that with a 90%CO_(2) capture rate,the associated heat consumption amounts to 4.6 MJ perkilogram of CO_(2) captured.This combined approach offers a viable pathway to produce blue hydrogen on LNGcarriers while significantly reducing the carbon footprint.
文摘The scientific community has reached firm consensus that humans know less about the ocean than they do about the moon.Even though we have developed submersibles capable of diving to depths of ten thousand meters,our understanding of the oceans covering approximately 71 percent of the Earth’s surface remains scarce.A paper published in Science Advances last May noted that only 0.001 percent of the deep seafloor(190 meters or more below Earth’s surface)has been visually observed by scientists,yet this tiny fraction accounts for 95 percent of the total surface area of the oceans around the globe.
基金Supported by the President’s International Fellowship Initiative of Chinese Academy of Sciences(No.2024 PVC 0010)。
文摘Marine pollution is a well-recognized phenomenon that has many negative effects on the marine environment.The effects of marine pollution are due to the discharge of hazardous materials,toxins,or other pollutants into the marine environment,which includes seas,estuaries,oceans,and other water bodies,and this unwanted input affects the blue economy.The blue economy,which includes industries and research associated with marine and ocean resources,is often affected by marine pollution on multiple levels,such as economic costs,direct resource impacts,health risks,and infrastructure damage.In one report,the pollution-related issues in many countries were estimated at 9 t/inh and clean-up costs between$12 to$160/t.More extensive pollution mitigation projects might take up to 15 years to conclude and cost up to$500/t.To better understand the role of marine pollution and its impact on the blue economy,some key parameters are discussed as follows:the role of biofouling,volatile organic compounds,the impact of metals,anionic pollutants,and antifouling coatings.The review findings also highlight the impact of marine pollution on ecosystems and associated economic activities,which could be reduced through measures such as better international cooperation,waste management,and the development of sustainable practices.Related information on the strategies and policies that could be adopted for sustainable blue economy are stated after each section.
基金financially supported by research grants from Innovative Research Group Project of National Natural Science Foundation of China(No.52021004)National Key Research and Development Program of China(2022YFB3803300)+2 种基金National Natural Science Foundation of China(62474026 and 62074022)Natural Science Foundation of Chongqing(CSTB2024NSCQ-MSX1215,cstc2021jcyj-jqX0015 and CSTB2022NSCQ-MSX1183)the Youth Talent Support Program of Chongqing(CQYC2021059206).
文摘ⅢThe superior adaptability of Prussian blue analogues(PBAs)in interacting with potassium ions has shifted research focus toward their potential application as cathodes of potassium-ion batteries(PIBs).The large interstitial space formed between metal ions and–C≡N–in PBAs can accommodate large-radius K^(+).However,the rapid nucleation in the co-precipitation synthesis process of PBAs induces many lattice defects of[M(CN)_(6)]^(4-)vacancies(V_([M–C≡N])),interstitial and coordinated H_(2)O molecules,which will directly lead to performance degradation.Moreover,originating from various transition metal elements in low/high-spin electron configuration states,PBAs exhibit diverse electrochemical behaviors,such as low reaction kinetics of low-spin iron(Ⅱ),Jahn-Teller distortion and dissolution of manganese(Ⅲ),and electrochemical inertness of nickel(Ⅱ)and copper(Ⅱ).Here,we summarize recently reported structures and properties of PBAs,classifying them based on the types of transition metals(iron,cobalt,manganese,copper,nickel)employed.Advanced synthesis strategies,including control engineering of crystallinity based on H_(2)O molecules and V_([M–C≡N]),were discussed.Also,the approaches for enhancing the electrochemical performance of PBAs were highlighted.Finally,the challenges and prospects towards the future development of PBAs are put forward.The review is expected to provide technical and theoretical support for the design of high-performance PBAs.
基金supported by the Key Reasearch and Development Program of Zhejiang(2022C01029)the National Natural Science Foundation of China(22225802 and 22288102)the Research Funds of Institute of Zhejiang University-Quzhou(IZQ2022KJ3005).
文摘The removal of cesium-137(^(137)Cs)from nuclear wastewater remains crucial due to its radioactivity and high solubility in water,which pose serious risk to human health and the environment.Aiming at selective capture of Cs^(+) from wastewater,a core-shell adsorbent,Prussian blue analog@y-alumina(PBA@Al_(2)O_(3))pellets were synthesized using the hydrothermal-stepwise deposition method.The coreshell PBA@Al_(2)O_(3)pellets showcased a PBA loading of 25%and demonstrated a maximum adsorption capacity of 15.65 mg·g^(-1).The adsorption data was consistent with the pseudo-second-order kinetic model and the Langmuir isotherm model.It effectively reduced bulk Cs^(+) concentrations from an initial 6.62 mg·L^(-1)to 2 μg·L^(-1),achieving a removal efficiency of 99.97%and distribution coefficient(Kd)of 1.265×10^(6)ml·g^(-1),surpassing the performance of other PBA-based materials.The material also indicated good mechanical properties and cesium ion removal rates of 99.7%across a wide pH range(1.82 to 11.12).Furthermore,PBA@Al_(2)O_(3)exhibited consistent removal rate of over 99%and good selectivity(SF=50-1600)towards Cs^(+) even in the presence of interfering ions such as Na^(+),K^(+),Mg^(2+),and Ca^(2+)ions.The Kd(Cs^(+))for PBA@Al2O3 in simulated seawater and groundwater were 9.92×10^(3)and 2.23×10^(4)ml·g^(-1),where the removal rates reached 96.1%and 98.2%,respectively.XPS confirms that the adsorption mechanism is the ion exchange between Cs^(+) and K^(+)ions.This study underscores the significant potential of inorganic core-shell pellets adsorbents as promising agents for the selective capture of Cs^(+) from wastewater.
