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Eco-friendly synthesis coupled with predictive analytics:Developing hierarchical lignin-derived ordered mesoporous carbon for advanced supercapacitors
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作者 Xiaolan Zhao Xiaoqi Wang +5 位作者 Pei Gao Peng Zhao Jingjing Wang Yingna Li Zhibin Han Boxiong Shen 《Green Energy & Environment》 2025年第6期1256-1269,共14页
Hierarchical lignin-derived ordered mesoporous carbon(HOMC)was significant for advanced supercapacitors.However,achieving controllable fabrication and optimizing electrochemical behavior were challenging.In this work,... Hierarchical lignin-derived ordered mesoporous carbon(HOMC)was significant for advanced supercapacitors.However,achieving controllable fabrication and optimizing electrochemical behavior were challenging.In this work,an eco-friendly HOMC was synthesized using lignin as carbon precursors and Zn^(2+)as cross-linking and pore-forming agents,followed by KHCO_(3)activation,eliminating the need for toxic phenolic resins and acid treatments for metal removal.Machine learning technology,specifically an Artificial Neural Network(ANN model,was utilized to assist the experimental design and prediction.The ANN model suggested an ideal hierarchical structure and optimized oxygen level,achieved through the adjustment of Zn^(2+)additive concentration,carbonization temperature,and subsequent KHCO_(3)activation to maximize capacitance.The HOMC electrode,with a micropore-to-mesopore ratio(S_(micro)/S_(meso))of 1.01 and an oxygen content of 8.81 at%,acquired a specific capacitance of 362 F·g^(-1)at 0.5 A·g^(-1)in 6 mol·L^(-1)KOH electrolyte.The assembled HOMC//HOMC supercapacitor could afford a high energy density of 33.38 Wh·kg^(-1)with a corresponding specific power density of 300 W·kg^(-1)in TEATFB PC electrolyte.Meanwhile,the long-term cycle stability of 94.33%was achieved after 20,000 cycles.This work provides an ANN assisted strategy for the synthesis of HOMC,highlighting its potential to valorize biomass and agricultural waste in sustainable energy storag solutions. 展开更多
关键词 LIGNIN Biomass Hierarchical ordered mesoporous carbon Machine learning Artificial neural network SUPERCAPACITOR
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Influence of Preparation Conditions on Structural Stability of Ordered Mesoporous Carbons Synthesized by Evaporation-induced Triconstituent Co-assembly Method 被引量:1
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作者 游波 杨俊 +3 位作者 雍国平 刘少民 谢卫 苏庆德 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2011年第3期365-372,I0004,共9页
Various ordered mesoporous carbons (OMCs) have been prepared by evaporation-induced trieonstituent co-assembly method. Their mesostructural stability under different carbon content, aging time and acidity were conve... Various ordered mesoporous carbons (OMCs) have been prepared by evaporation-induced trieonstituent co-assembly method. Their mesostructural stability under different carbon content, aging time and acidity were conveniently monitored by X-ray diffraction, transmission electron microscopy, and N2 sorption isotherms techniques. The results show mesostruetural stability of OMCs is enhanced as the carbon content increases from 36% to 46%, further increasing carbon content deteriorates the mesostructural stability. Increasing aging time from 0.5 h to 5.0 h make the mesostructural stability go through an optimum (2.0 h) and gradually reduce framework shrinkage of the OMCs. Highly OMCs can only be obtained in the acidity range of 0.2-1.2 mol/L HC1, when the acidity is near the isoelectrie point of silica, the resulting OMCs have the best mesostructure stability. Under the optimum condition, the carbon content of 46%, aging time of 2.0 h, and 0.2 mol/L HCl, the resulting OMCs have the best mesostrueture stability and the highest BET surface areas of 2281 m2/g. 展开更多
关键词 Triblock copolymer Mesostructural stability SELF-ASSEMBLY ordered mesoporous carbon
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Pt nanoparticles entrapped in ordered mesoporous carbons:An efficient catalyst for the liquid-phase hydrogenation of nitrobenzene and its derivatives 被引量:6
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作者 李君瑞 李晓红 +1 位作者 丁玥 吴鹏 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2015年第11期1995-2003,共9页
Pt nanoparticles entrapped in ordered mesoporous CMK-3 carbons with p6mm symmetry were prepared using a facile impregnation method, and the resulting materials were characterized using X-ray diffraction spectroscopy, ... Pt nanoparticles entrapped in ordered mesoporous CMK-3 carbons with p6mm symmetry were prepared using a facile impregnation method, and the resulting materials were characterized using X-ray diffraction spectroscopy, N2 adsorption-desorption, scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, and X-ray photoelectron spectroscopy. The Pt nanoparticles were highly dispersed in the CMK-3 with 43.7% dispersion. The Pt/CMK-3 catalyst was an effective catalyst for the liquid-phase hydrogenation of nitrobenzene and its derivatives under the experimental conditions studied here. The Pt/CMK-3 catalyst was more active than commercial Pt/C catalyst in most cases. A highest turnover frequency of 43.8 s-1 was measured when the Pt/CMK-3 catalyst was applied for the hydrogenation of 2-methyl-nitrobenzene in ethanol under optimal conditions. It is worthy of note that the Pt/CMK-3 catalyst could be recycled easily, and could be reused at least fourteen times without any loss in activity or selectivity for the hydrogenation of nitrobenzene in ethanol. 展开更多
关键词 Pt nanoparticle Nitrobenzene compound Liquid-phase hydrogenation ordered mesoporous carbon
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Ordered mesoporous carbon supported bifunctional PtM(M=Ru,Fe,Mo)electrocatalysts for a fuel cell anode 被引量:2
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作者 洪锦德 刘子豪 +3 位作者 维拉库玛 吴培豪 刘端祺 刘尚斌 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第1期43-53,共11页
The deposition onto an ordered mesoporous carbon(OMC)support of well dispersed PtM(M = Ru,Fe,Mo)alloy nanoparticles(NPs)were synthesized by a direct replication method using SBA-15 as the hard template,furfuryl ... The deposition onto an ordered mesoporous carbon(OMC)support of well dispersed PtM(M = Ru,Fe,Mo)alloy nanoparticles(NPs)were synthesized by a direct replication method using SBA-15 as the hard template,furfuryl alcohol and trimethylbeneze as the primary carbon sources,and metal acetylacetonate as the alloying metal precursor and secondary carbon source.The physicochemical properties of the PtM-OMC catalysts were characterized by N2 adsorption-desorption,X-ray diffraction,transmission electron microscopy,X-ray absorption near edge structure,and extended X-ray absorption fine structure.The alloy PtM NPs have an average size of 2-3 nm and were well dispersed in the pore channels of the OMC support.The second metal(M)in the PtM NPs was mostly in the reduced state,and formed a typical core(Pt)-shell(M)structure.Cyclic voltammetry measurements showed that these PtM-OMC electrodes had excellent electrocatalytic activities and tolerance to CO poisoning during the methanol oxidation reaction,which surpassed those of typical activated carbon-supported PtRu catalysts.In particular,the PtFe-OMC catalyst,which exhibited the best performance,can be a practical anodic electrocatalyst in direct methanol fuel cells due to its superior stability,excellent CO tolerance,and low production cost. 展开更多
关键词 ordered mesoporous carbon Platinum-based electrocatalysts Methanol oxidation reaction X-ray absorption spectroscopy Core-shell alloy nanoparticles Carbon monoxide-stripping VOLTAMMETRY Fuel cells
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Preparation and improved photocatalytic activity of ordered mesoporous TiO_2 by evaporation induced self-assembly technique using liquid crystal as template 被引量:2
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作者 刘晨 李佑稷 +2 位作者 徐鹏 李泽时 曾孟雄 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2014年第4期1072-1078,共7页
Ordered mesoporous TiO2 (OMPT) was prepared by an evaporation induced self-assembly technique using liquid crystal as template. The key factors affecting the methylene blue (MB) oxidation efficiency were investiga... Ordered mesoporous TiO2 (OMPT) was prepared by an evaporation induced self-assembly technique using liquid crystal as template. The key factors affecting the methylene blue (MB) oxidation efficiency were investigated, including the initial concentration of MB, pH value and catalyst concentration. The results show that the obtained OMPT has high thermal stability and shows a 2D hexagonal mesostructure with the small particle size and high surface area, which lead to higher degradation efficiency than commercial P25 or nanoparticle TiO2 (NPT) fabricated by sol-gel process. The optimal conditions are 5 mg/L MB, pH 6 and 1.5 g/L OMPT for the fastest rate of MB degradation. Total organic carbon (TOC) analysis indicates complete mineralization of MB in 240 min by OMPT, with rate constant higher than NPT or P25. 展开更多
关键词 TITANIA ordered mesopore liquid crystal template methylene blue degradation
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Heterogeneous Fenton-like degradation of 4-chlorophenol using iron/ordered mesoporous carbon catalyst 被引量:16
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作者 Feng Duan Yuezhu Yang +3 位作者 Yuping Li Hongbin Cao Yi Wang Yi Zhang 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2014年第5期1171-1179,共9页
Ordered mesoporous carbon supported iron catalysts (Fe/OMC) were prepared by the incipient wetness impregnation method and investigated in Fenton-like degradation of 4-chlorophenol (4CP) in this work. XRD and TEM ... Ordered mesoporous carbon supported iron catalysts (Fe/OMC) were prepared by the incipient wetness impregnation method and investigated in Fenton-like degradation of 4-chlorophenol (4CP) in this work. XRD and TEM characterization showed that the iron oxides were well dispersed on the OMC support and grew bigger with the increasing calcination temperature. The catalyst prepared with a lower calcination temperature showed higher decomposition efficiency towards 4CP and H202, but more metals were leached. The effect of different operational parameters such as initial pH, H202 dosage, and reaction temperature on the catalytic activity was evaluated. The results showed that 96.1% of 4CP and 47.4% of TOC was removed after 270 min at 30℃, initial pH of 3 and 6.6 mmol/L H202.88% of 4CP removal efficiency was retained after three successive runs, indicating Fe/OMC a stable catalyst for Fenton reaction. 4CP was degraded predominately by the attack of hydroxyl radical formed on the catalyst surface and in the bulk solution due to iron leaching. Based on the degradation intermediates detected by high performance liquid chromatography, possible oxidation pathways were proposed during the 4CP degradation. 展开更多
关键词 ordered mesoporous carbon calcination temperature hydrogen peroxide hydroxyl radical heterogeneous Fenton
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Ordered mesoporous Fe/TiO_2 with light enhanced photo-Fenton activity 被引量:9
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作者 Zhenmin Xu Ru Zheng +2 位作者 Yao Chen Jian Zhu Zhenfeng Bian 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2019年第5期631-637,共7页
Ordered mesoporous Fe/TiO2 was prepared by an evaporation-induced self-assembly method. The iron ions were in situ embedded in the pore wall of the TiO2 framework. The catalyst has excellent light-assisted Fenton cata... Ordered mesoporous Fe/TiO2 was prepared by an evaporation-induced self-assembly method. The iron ions were in situ embedded in the pore wall of the TiO2 framework. The catalyst has excellent light-assisted Fenton catalytic performance under UV and visible light irradiation. X-ray diffraction and transmission electron microscopy results showed that the TiO2 samples have an ordered two-dimensional hexagonal pore structure and an anatase phase structure with high crystallinity. The ordered pore structure of the TiO2 photocatalyst with a large specific surface area is beneficial to mass transfer and light harvesting. Furthermore, iron ions can be controlled by embedding them into the TiO2 framework to prevent iron ion loss and inactivation. After five cycles, the reaction rate of the ordered mesoporous Fe/TiO2 remained unchanged, indicating that the material has stable performance and broad application prospects for the purification of environmental pollutants. 展开更多
关键词 ordered mesoporous TiO2 Iron doping PHOTO-FENTON PHOTOCATALYSIS
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Catalytic performance enhancement by alloying Pd with Pt on ordered mesoporous manganese oxide for methane combustion 被引量:8
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作者 Peng Xu Zhixing Wu +4 位作者 Jiguang Deng Yuxi Liu Shaohua Xie Guangsheng Guo Hongxing Dai 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2017年第1期92-105,共14页
Ordered mesoporous Mn2O3 (meso‐Mn2O3) and meso‐Mn2O3‐supported Pd, Pt, and Pd‐Pt alloy x(PdyPt)/meso‐Mn2O3; x = (0.10?1.50) wt%; Pd/Pt molar ratio (y) = 4.9?5.1 nanocatalysts were prepared using KIT‐6‐templated... Ordered mesoporous Mn2O3 (meso‐Mn2O3) and meso‐Mn2O3‐supported Pd, Pt, and Pd‐Pt alloy x(PdyPt)/meso‐Mn2O3; x = (0.10?1.50) wt%; Pd/Pt molar ratio (y) = 4.9?5.1 nanocatalysts were prepared using KIT‐6‐templated and poly(vinyl alcohol)‐protected reduction methods, respectively.The meso‐Mn2O3 had a high surface area, i.e., 106 m2/g, and a cubic crystal structure. Noble‐metalnanoparticles (NPs) of size 2.1?2.8 nm were uniformly dispersed on the meso‐Mn2O3 surfaces. AlloyingPd with Pt enhanced the catalytic activity in methane combustion; 1.41(Pd5.1Pt)/meso‐Mn2O3gave the best performance; T10%, T50%, and T90% (the temperatures required for achieving methaneconversions of 10%, 50%, and 90%) were 265, 345, and 425 °C, respectively, at a space velocity of20000 mL/(g?h). The effects of SO2, CO2, H2O, and NO on methane combustion over1.41(Pd5.1Pt)/meso‐Mn2O3 were also examined. We conclude that the good catalytic performance of1.41(Pd5.1Pt)/meso‐Mn2O3 is associated with its high‐quality porous structure, high adsorbed oxygen species concentration, good low‐temperature reducibility, and strong interactions between Pd‐Pt alloy NPs and the meso‐Mn2O3 support. 展开更多
关键词 ordered mesoporous manganese oxide Pd‐Pt alloy nanoparticle Supported noble metal catalyst Strong metal‐support interaction Methane combustion
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Synthesis of a new ordered mesoporous NiMoO_4 complex oxide and its efficient catalytic performance for oxidative dehydrogenation of propane 被引量:7
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作者 Xiaoqiang Fan Jianmei Li +4 位作者 Zhen Zhao Yuechang Wei Jian Liu Aijun Duan Guiyuan Jiang 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2014年第2期171-178,共8页
Highly ordered mesoporous NiMoO4 material was successfully synthesized using mesoporous silica KIT-6 as hard template via vacuum nanocasting method. The structure was characterized by means of XRD, TEM, N2 adsorption-... Highly ordered mesoporous NiMoO4 material was successfully synthesized using mesoporous silica KIT-6 as hard template via vacuum nanocasting method. The structure was characterized by means of XRD, TEM, N2 adsorption-desorption, Raman and FT-IR. The mesoporous NiMoO4 with the coexistence of a-NiMoO4 and fl-NiMoO4 showed well-ordered mesoporous structure, a bimodal pore size distribution and crystalline framework. The catalytic performance of NiMoOa was investigated for oxidative dehydrogenation of propane. It is demonstrated that the mesoporous NiMoO4 catalyst with more surface active oxygen species showed better catalytic performance in oxidative dehydrogena- tion of propane in comparison with bulk NiMoO4. 展开更多
关键词 ----w 7ordered mesoporous structure NiMoO4 complex oxide vacuum nanocasting PROPANE oxidative dehydrogenation
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Nitrogen-doped ordered mesoporous carbon:Effect of carbon precursor on oxygen reduction reactions 被引量:5
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作者 Xiao-hua Li Kai Wan +3 位作者 Quan-bing Liu Jin-hua Piao Yu-ying Zheng Zhen-xing Liang 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第9期1562-1568,共7页
Aniline,pyrrole and phenanthroline,which have different nitrogen compositions,are used as carbon precursors to synthesize nitrogen-doped ordered mesoporous carbons(NOMCs) by the nanocasting method.The effect of the ... Aniline,pyrrole and phenanthroline,which have different nitrogen compositions,are used as carbon precursors to synthesize nitrogen-doped ordered mesoporous carbons(NOMCs) by the nanocasting method.The effect of the precursor on the resultant NOMC is extensively investigated by nitrogen adsorption-desorption measurements,scanning electron microscopy,X-ray photoelectron spectroscopy(XPS),cyclic voltammetry and rotating ring-disk electrode measurements.Salient findings are as follows.First,the precursor has a significant influence on the specific surface area and textural properties.The NOMC materials derived from pyrrole(C-PY-900:765 m^2/) and phenanthroline(C-Phen-900:746 m^2/) exhibit higher specific surface areas than the aniline analog(C-PA-900:569 m^2/).Second,the XPS results indicate that the total nitrogen content(ca.3.1–3.3 at%) is similar for the three carbon sources,except for a slight difference in the nitrogen configuration.Furthermore,the content of the nitrogen-activated carbon atoms is found to closely depend on the precursor,which is the highest for the phenanthroline-derived carbon.Third,the electrochemical results reveal that the electrocatalytic activity follows in the order C-PA-900 C-PY-900 C-Phen-900,confirming that the nitrogen-activated carbon atoms are the active sites for the oxygen reduction reaction(ORR).In summary,the precursor has considerable influence on the composition and textural properties of the NOMC materials,of which the ORR electrocatalytic activity can be enhanced through optimization of the NOMCs. 展开更多
关键词 ELECTROCATALYSIS Fuel cell Nitrogen-doped ordered mesoporous carbon Oxygen reduction reaction PRECURSOR
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Synthesis and Characterization of Titanium-doped Ordered Mesoporous Alumina 被引量:4
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作者 肖雪清 孙倩萍 +2 位作者 刘芳 郑瑛 林金火 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2014年第3期490-497,共8页
Titanium-doped ordered mesoporous alumina with specific structural properties has been prepared by the evaporation induced self-assembly sol-gel method. The results show that the doped titanium helps to stabilize the ... Titanium-doped ordered mesoporous alumina with specific structural properties has been prepared by the evaporation induced self-assembly sol-gel method. The results show that the doped titanium helps to stabilize the ordered mesoporous alumina material without influencing the ordered mesoporosity. The textural properties of the obtained sample are related to the amount of doped titanium. When the molar ratio of aluminum to titanium (n(Al)/n(Ti)) is controlled as 10.2, the titanium-doped ordered mesoporous alumina exhibits high surface area (up to 218 m^2 g^-1), large pore volume (0.42 cm^3 g^-1) and narrow pore diameter (6.1 nm) after treating at 900 ℃, showing high thermal stability. Moreover, the obtained sample calcined at 900 ℃ still maintains ordered mesoporous structure and exhibits high thermal stability. 展开更多
关键词 sol-gel growth ordered mesoporous alumina phase transitions thermal properties
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The effect of chelating agent on hydrodesulfurization reaction of ordered mesoporous alumina supported Ni Mo catalysts 被引量:4
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作者 Di Hu Hui-Ping Li +5 位作者 Jin-Lin Mei Cheng-Kun Xiao En-Hua Wang Xi-Yue Chen Wen-Xin Zhang Ai-Jun Duan 《Petroleum Science》 SCIE CAS CSCD 2022年第1期321-328,共8页
In this paper,ordered mesoporous alumina(OMA)support with the high surface area(328 m^(2)g^(-1))and the large pore volume 0.74(cm^(3)·g^(-1))was synthesized by homogeneous precipitation method.And the influence o... In this paper,ordered mesoporous alumina(OMA)support with the high surface area(328 m^(2)g^(-1))and the large pore volume 0.74(cm^(3)·g^(-1))was synthesized by homogeneous precipitation method.And the influence of EDTA on the physical and chemical properties of the modified catalysts was also studied.The characteristic results showed that the addition of EDTA could adjust the metal-support interaction and improved the acidity of the corresponding catalyst.Combined with the catalytic performance results,the EDTA-modified Ni Mo E(1.0)/OMA catalyst displays the highest DBT hydrodesulfurization conversion(97.7%). 展开更多
关键词 Chelating agent HYDRODESULFURIZATION ordered mesoporous alumina
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Different Synthesis Methods for Ordered Mesoporous Silicas And Their Characteristics Comparison 被引量:4
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作者 雷家珩 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2003年第3期1-4,共4页
Ordered mesoporous silica were synthesized under different conditions:hydrothermal synthesis in basic medium,room temperature synthesis in acid medium and sol gel synthesis in neutral medium,and pore structure,specif... Ordered mesoporous silica were synthesized under different conditions:hydrothermal synthesis in basic medium,room temperature synthesis in acid medium and sol gel synthesis in neutral medium,and pore structure,specific surface area and pore size distribution of samples were studied and compared in detail by means of SAXRD,HRTEM,BET,FT IR.The results show that the mesopores in the samples obtained via above three methods all possess uniform hexagonal arrays in short range.Mesoporous silica obtained in acid medium possesses narrow pore size distribution centered around 1.24nm with specific surface area of 1220 m 2·g -1 ;Mesoporous silica obtained in basic medium by hydrothermal synthesis at 160℃ possesses narrow pore size distribution centered around 1.90nm with specific surface area of 542.8 m 2·g -1 ;and mesoporous silica obtained in neutral medium by sol gel synthesis possesses broader pore size distribution centered around 4.01nm,specific surface area of 485.0 m 2·g -1 .Therefore,ordered mesoporous silicas with different pore sizes can be prepared using various synthetic methods and conditions.After heat treatment,Si O Si bending vibration strengthens and the adsorption peak of asymmetrical Si O Si stretching vibration broadens,and the crosslinking and condensation reaction of silica skeleton strengthen, meanwhile the amount of active centers of hydroxyl group on the surface of mesopores may be influenced,thus chemical assembly activity of mesopores may also be influenced. 展开更多
关键词 ordered mesoporous materials isothermal adsorption host vip assembly
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NIR-triggered drug delivery system based on phospholipid coated ordered mesoporous carbon for synergistic chemo-photothermal therapy of cancer cells 被引量:3
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作者 Anman Zhang Luo Hai +4 位作者 Tianzheng Wang Hong Cheng Man Li Xiaoxiao He Kemin Wang 《Chinese Chemical Letters》 SCIE CAS CSCD 2020年第12期3158-3162,共5页
Chemo-photothermal treatment is one of the most efficient strategies for cancer therapy.However,traditional drug carriers without near-infrared absorption capacity need to be loaded with materials behaving phototherma... Chemo-photothermal treatment is one of the most efficient strategies for cancer therapy.However,traditional drug carriers without near-infrared absorption capacity need to be loaded with materials behaving photothermal properties,as it results in complicated synthesis process,inefficient photothermal effects and hindered NIR-mediated drug release.Herein we report a facile synthesis of a polyethylene glycol(PEG)linked liposome(PEG-liposomes)coated doxorubicin(DOX)-loaded ordered mesoporous carbon(OMC)nanocomponents(PEG-LIP@OMC/DOX)by simply sonicating DOX and OMC in PEG-liposomes suspensions.The as-obtained PEG-LIP@OMC/DOX exhibits a nanoscale size(600±15 nm),a negative surface potential(-36.70 mV),high drug loading(131.590 mg/g OMC),and excellent photothermal properties.The PEG-LIP@OMC/DOX can deliver loaded DOX to human MCF-7 breast cancer cells(MCF-7)and the cell toxicity viability shows that DOX unloaded PEG-LIP@OMC has no cytotoxicity,confirming the PEG-LIP@OMC itself has excellent biocompatibility.The NIR-triggered release studies demonstrate that this NIR-responsive drug delivery system enables on-demand drug release.Furthermore,cell viability results using human MCF-7 cells demonstrated that the combination of NIR-based hyperthermal therapy and triggered chemothe rapy can provide higher therapeutic efficacy than re spective monothe rapies.With these excellent features,we believe that this phospholipid coating based multifunctional delivery system strategy should promote the application of OMC in nanomedical applications. 展开更多
关键词 ordered mesoporous carbon Polyethylene glycol linked liposomes Stimuli-responsive drug delivery system NIR-triggered drug delivery Chemo-photothermal therapy
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Adsorption of benzene, cyclohexane and hexane on ordered mesoporous carbon 被引量:20
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作者 Gang Wang Baojuan Dou +3 位作者 Zhongshen Zhang Junhui Wang Haier Liu Zhengping Hao 《Journal of Environmental Sciences》 SCIE EI CAS CSCD 2015年第4期65-73,共9页
Ordered mesoporous carbon(OMC) with high specific surface area and large pore volume was synthesized and tested for use as an adsorbent for volatile organic compound(VOC)disposal. Benzene, cyclohexane and hexane w... Ordered mesoporous carbon(OMC) with high specific surface area and large pore volume was synthesized and tested for use as an adsorbent for volatile organic compound(VOC)disposal. Benzene, cyclohexane and hexane were selected as typical adsorbates due to their different molecular sizes and extensive utilization in industrial processes. In spite of their structural differences, high adsorption amounts were achieved for all three adsorbates, as the pore size of OMC is large enough for the access of these VOCs. In addition, the unusual bimodal-like pore size distribution gives the adsorbates a higher diffusion rate compared with conventional adsorbents such as activated carbon and carbon molecular sieve. Kinetic analysis suggests that the adsorption barriers mainly originated from the difficulty of VOC vapor molecules entering the pore channels of adsorbents. Therefore, its superior adsorption ability toward VOCs, together with a high diffusion rate, makes the ordered mesoporous carbon a promising potential adsorbent for VOC disposal. 展开更多
关键词 Volatile organic compounds Adsorption ordered mesoporous carbon Isosteric heat of adsorption Knudsen diffusion
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Synthesis of ordered mesoporous γ-Al_2O_3:Eu^(3+) with high luminous performance and thermal stability 被引量:2
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作者 余彩霞 阳区 +1 位作者 沙磊 刘应亮 《Journal of Rare Earths》 SCIE EI CAS CSCD 2011年第8期732-736,共5页
An efficient and convenient one-step process was developed for synthesizing new effective red luminous materials through ordered mesoporous γ-alumina assembling with Eu3+. Employing P123 as a structure-directing age... An efficient and convenient one-step process was developed for synthesizing new effective red luminous materials through ordered mesoporous γ-alumina assembling with Eu3+. Employing P123 as a structure-directing agent and hydrochloric acid, citric acid as pH adjustor, ordered mesoporous γ-alumina was fabricated by simple sol-gel method. The pore structure was characterized by X-ray diffraction (XRD), N2 adsorption-desorption isotherms and transmission electron microscopy (TEM). The as-synthesized γ-aluminas had narrow pore-size distribution (5–7 nm), large surface area (246 m2/g) and high thermal stability (750–1000 oC). The luminous property of materials was characterized by Photoluminescence (PL) spectra. The γ-Al2O3:Eu3+ materials had efficient luminescence, and the emission strength was related to the content of Eu3+. 展开更多
关键词 ordered mesoporous γ-alumina sol-gel method ONE-STEP luminescene chromatic purity rare earths
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A facile and controllable one-pot synthesis approach to amino-functionalized hollow silica nanoparticles with accessible ordered mesoporous shells 被引量:2
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作者 Shaoxin Deng Cheng-Xing Cui +4 位作者 Lu Liu Lingyao Duan Jichao Wang Yuping Zhang Lingbo Qu 《Chinese Chemical Letters》 SCIE CAS CSCD 2021年第3期1177-1180,共4页
The development of a practical synthetic method to functionalize hollow mesoporous silica with organic groups is of current intere st for selective adsorption and ene rgy storage applications.Herein,a facile and contr... The development of a practical synthetic method to functionalize hollow mesoporous silica with organic groups is of current intere st for selective adsorption and ene rgy storage applications.Herein,a facile and controllable one-pot approach for the synthesis of monodisperse amino-functionalized hollow mesoporous silica nanoparticles is presented.A novel solid-to-hollow structural transformation procedure of the silica nanoparticles is presented.The structural transformation is easily designed,as obse rved through transmission electro n microscopy,by tailo ring the HCl and N-lauroylsarcosine sodium molar ratio and the water content in the sol-gel.Ordered and radially oriented in situ aminofunctionalized mesochannels were successfully introduced into the shells of the hollow silica nanoparticles.A formation mechanism for the hollow mesoporous silica materials is discussed. 展开更多
关键词 Hollow silica One-pot approach Solid-to-hollow transformation ordered mesoporous shell Amino functionalization
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Ordered mesoporous carbon fiber bundles with high-density and accessible Fe-NX active sites as efficient ORR catalysts for Zn-air batteries 被引量:2
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作者 Fengxian Zhang Xupo Liu +4 位作者 Ye Chen Miao Tian Tianfang Yang Jing Zhang Shuyan Gao 《Chinese Chemical Letters》 SCIE CAS CSCD 2023年第10期242-251,共10页
Fe-NX/C electrocatalysts have aroused extensive interest in accelerating sluggish oxygen reduction reaction (ORR) kinetics as potential alternatives to platinum catalysts in rechargeable Zn-air batteries (ZABs).Howeve... Fe-NX/C electrocatalysts have aroused extensive interest in accelerating sluggish oxygen reduction reaction (ORR) kinetics as potential alternatives to platinum catalysts in rechargeable Zn-air batteries (ZABs).However,the low density and poor accessibility of Fe-NXsites have severely restricted the electrocatalytic performance of Fe-NX/C.Herein,Fe,N co-doped ordered mesoporous carbon fiber bundles are prepared through a ligand-assisted strategy with nitrogen-rich 1,10-phenanthroline as space isolation agent.1,10-Phenanthroline reveals a six-membered heterocyclic structure containing abundant nitrogen species to tightly coordinate with Fe ions,which is conducive to achieving high-density Fe-NXsites.Meanwhile,the adoption of SBA-15 as hard-templates enables the catalysts with highly ordered channels and large specific surface areas,improving the accessibility of Fe-NXsites.The optimal catalyst (PDA-Fe-900) demonstrates a positive half-wave potential of 0.84 V (vs.RHE) in alkaline solution,outperforming the commercial Pt/C (0.83 V).In addition,PDA-Fe-900 delivers comparable ORR performance to commercial Pt/C in acidic electrolyte.Impressively,when PDA-Fe-900 is employed as an air cathode,it achieves large power densities of 163.0 m W/cm^(2) in liquid-state ZAB and 116.6 m W/cm^(2) in the flexible solid-state ZAB.This work provides an efficient ligand-assisted pathway for fabricating catalysts with dense and accessible FeNXsites as high-performance ORR electrocatalysts for ZABs. 展开更多
关键词 Oxygen reduction reaction ordered mesoporous carbon High-density Fe-Nx sites ACCESSIBILITY Zn-air battery
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Chemically Modified Ordered Mesoporous Carbon/Polyaniline Composites for Electrochemical Capacitors 被引量:2
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作者 KONG Llng-bin ZHANG Jing +3 位作者 CAI Jlan-jun YANG Zhen-sheng LUO Yong-chun KANG Long 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2011年第2期295-299,共5页
Chemically modified ordered mesoporous carbon CMK-3 materials were prepared by means of an easy wet-oxidative method in 2 mol/L nitric acid aqueous solution. A large amount of oxygen-containing functional groups were ... Chemically modified ordered mesoporous carbon CMK-3 materials were prepared by means of an easy wet-oxidative method in 2 mol/L nitric acid aqueous solution. A large amount of oxygen-containing functional groups were introduced onto the CMK-3 surface. Modified CMK-3(m-CMK-3) and aniline monomer were polymerized via an in situ chemical oxidative polymerization method. Morphological characterizations of m-CMK-3/PANI (polyaniline) composites were carried out via field emission scanning electron microscopy(SEM). Their electrochemical properties were investigated with cyclic voltammetry, galvanostatic charge-discharge, and electrochemical impedance spectroscopy. The m-CMK-3/PANI composites have excellent properties in capacitance, and the highest specific capacitance(SC) value was up to 489 F/g, suggesting their potential application in the electrode material for electrochemical capacitors. 展开更多
关键词 ordered mesoporous carbon POLYANILINE Chemical modification In situ chemical polymerization Electrochemical capacitor
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Ordered mesoporous materials for water pollution treatment:Adsorption and catalysis 被引量:2
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作者 Peng Zhang Mingming He +4 位作者 Wei Teng Fukuan Li Xinyuan Qiu Kexun Li Hao Wang 《Green Energy & Environment》 SCIE EI CAS CSCD 2024年第8期1239-1256,共18页
To meet the growing emission of water contaminants,the development of new materials that enhance the efficiency of the water treatment system is urgent.Ordered mesoporous materials provide opportunities in environment... To meet the growing emission of water contaminants,the development of new materials that enhance the efficiency of the water treatment system is urgent.Ordered mesoporous materials provide opportunities in environmental processing applications due to their exceptionally high surface areas,large pore sizes,and enough pore volumes.These properties might enhance the performance of materials concerning adsorption/catalysis capability,durability,and stability.In this review,we enumerate the ordered mesoporous materials as adsorbents/catalysts and their modifications in water pollution treatment from the past decade,including heavy metals(Hg^(2+),Pb^(2+),Cd^(2+),Cr^(6+),etc.),toxic anions(nitrate,phosphate,fluoride,etc.),and organic contaminants(organic dyes,antibiotics,etc.).These contributions demonstrate a deep understanding of the synergistic effect between the incorporated framework and homogeneous active centers.Besides,the challenges and perspectives of the future developments of ordered mesoporous materials in wastewater treatment are proposed.This work provides a theoretical basis and complete summary for the application of ordered mesoporous materials in the removal of contaminants from aqueous solutions. 展开更多
关键词 Water pollution treatment ordered mesoporous materials Toxic contaminants ADSORPTION CATALYSIS
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