催化作用
介孔材料
化学
可重用性
苯甲醛
选择性
相(物质)
化学工程
水解
纳米颗粒
介孔二氧化硅
液相
有机化学
工程类
物理
热力学
程序设计语言
软件
计算机科学
作者
Xiaohong Li,Wenli Zheng,Huiyan Pan,Yu Yin,Li Chen,Peng Wu
标识
DOI:10.1016/j.jcat.2012.12.007
摘要
A series of TiO2@SBA-15 composites with different TiO2 loadings have been synthesized through hydrolysis of tetrabutyl orthotitanate via a facile sol–gel method in the presence of SBA-15 mesoporous silica. The TiO2@SBA-15 composites retain the mesostructure of the SBA-15 host, and TiO2 is highly dispersed and uniformly coated. The TiO2@SBA-15 composites serve as remarkable supports for Pt nanoparticles, which can be applied efficiently to the liquid-phase hydrogenation of benzaldehyde, its derivatives, and other unsaturated compounds under mild conditions. Of particular note is that the Pt/TiO2@SBA-15 catalysts can be reused several times without distinct loss in activity or selectivity. The more electron-deficient surface state, together with the structural and physicochemical features of Pt/TiO2@SBA-15 catalysts, would improve the catalytic activity and reusability toward the liquid-phase hydrogenation of unsaturated compounds.
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