Peculiarities of Tetrachloromethane vapor sorption by mesoporous gamma-Al2O3 templated at different stages of sol-gel process

摘要

The processes of adsorption-desorption of tetrachloromethane vapors by mesoporousy gamma-Al2O3 were investigated. Aluminum oxide was synthesized by the template method in the presence of micelles of cationic (cetylpyridinium chloride) and nonionic (Tween-85) surfactants added at various stages of sol-gel process. It was revealed that the shape of hysteresis loops depends on the structural peculiarities of the mesophase of template and gel-like boehmite. It was assumed that this effect is associated with the transformation of bottleshaped mesopores into open cylindrical mesopores.