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Influence of Preparation Conditions on Structural Stability of Ordered Mesoporous Carbons Synthesized by Evaporation-induced Triconstituent Co-assembly Method
Bo You,Jun Yang*,Guo-ping Yong,Shao-min Liu,Wei Xie,Qing-de Su*
Author NameAffiliationE-mail
Bo You Department of Chemistry, University of Science and Technology of China, Hefei 230026, China  
Jun Yang* Department of Chemistry, University of Science and Technology of China, Hefei 230026, China yjun8202@ustc.edu.c 
Guo-ping Yong Department of Chemistry, University of Science and Technology of China, Hefei 230026, China  
Shao-min Liu Department of Chemistry, University of Science and Technology of China, Hefei 230026, China  
Wei Xie Technology Center, China Tobacco Fujian Industrial Corporation, Xiamen 361000, China  
Qing-de Su* Department of Chemistry, University of Science and Technology of China, Hefei 230026, China qdsu@ustc.edu.cn 
Abstract:
Various ordered mesoporous carbons (OMCs) have been prepared by evaporation-induced triconstituent co-assembly method. Their mesostructural stability under different carbon content, aging time and acidity were conveniently monitored by X-ray diffraction, transmis-sion electron microscopy, and N2 sorption isotherms techniques. The results show mesostruc-tural 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 HCl, when the acidity is near the isoelectric point of silica, the resulting OMCs have the best mesostructure stability. Under the optimum condi-tion, the carbon content of 46%, aging time of 2.0 h, and 0.2 mol/L HCl, the resulting OMCs have the best mesostructure stability and the highest BET surface areas of 2281 m2/g.
Key words:  Triblock copolymer, Mesostructural stability, Self-assembly, Ordered meso-porous carbon
FundProject:
蒸发诱导三组分共组装制备有序介孔碳的制备条件对介观结构稳定性的影响
游波,杨俊*,雍国平,刘少民,谢卫,苏庆德*
摘要:
采用蒸发诱导三组分共组装方法制备一系列的有序介孔碳. 并利用X射线衍射仪、透射电镜以及N2吸附脱附仪探讨了碳含量、老化时间以及酸度对其介观结构稳定性的影响. 结果表明:碳含量由36%增加到46%时,介观结构的稳定性随之增强,继续增加碳含量反而破坏了其结构稳定性;老化时间从0.5 h逐渐增加到5.0 h,其中2.0 h介孔碳的结构稳定性较优且有效减少了介孔碳制备过程中的骨架收缩;0.2~1.2 mol/L的HCl均能制得高度有序的介孔碳,且当酸度接近硅的等电点时,得到的介孔碳具有较稳定
关键词:  三嵌段共聚物,介观结构稳定性,自组装,有序介孔碳
DOI:10.1088/1674-0068/24/03/365-372
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