摘要
A core-shell composite consisting of ZSM-5 zeolite as the core and ordered mesoporous silica as the shell was prepared by a surfactant-controlled sol-gel process and using tetradecylamine(TDA) as the template and Tetraethylorthosilicate(TEOS) as the silica precursor.The pores of the silica shell were found to be ordered and perpendicular to the crystal faces of the zeolite core.The thickness of the shell in the coreshell structured composite can be adjusted in the range of 20-90 nm,while the surface morphology and the pore size distribution were modified by changing the mass ratio of TEOS to zeolite.The composite molecular sieves have higher surface area for capturing molecules than ZSM-5,and with the increase of mesoporous shell layer,the ZSM-5@SiO_(2)-x composites show stronger adsorption capacity of butyraldehyde.However,when the shell thickness exceeds 90 nm,the adsorption capacity of butyraldehyde decreases instead.The composites have a huge potential for environmental applications.
作者
马扩彦
ZHAO Pengxian
YI Hongyu
俞海军
ZHOU Moxi
ZHANG Lingling
LIU Yupu
MA Kuoyan;ZHAO Pengxian;YI Hongyu;YU Haijun;ZHOU Moxi;ZHANG Lingling;LIU Yupu(Chongqing Key laboratory of Scientific Utilization of Tobacco Resource,Chongqing 400060,China;Department of Chemistry,Laboratory of Advanced Materials,Fudan University,Shanghai 200433,China)
