Influence of Preparation Conditions on Structural Stability of Ordered Mesoporous Carbons Synthesized by Evaporation-induced Triconstituent Co-assembly Method  

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

作　　者：游波[1] 杨俊[1] 雍国平[1] 刘少民[1] 谢卫 苏庆德[1] 

机构地区：[1]中国科学技术大学化学系,合肥230026 [2]福建中烟工业公司技术中心,厦门361000

出　　处：《Chinese Journal of Chemical Physics》2011年第3期365-372,I0004,共9页化学物理学报（英文）

基　　金：This work was supported by the National Natural Science Foundation of China （No.20872135）.

摘　　要：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.

关 键 词：Triblock copolymer Mesostructural stability SELF-ASSEMBLY Ordered mesoporous carbon 

分 类 号：O[理学]