文献类型：期刊文献

英文题名：Steam-Assisted in Situ Prepared TS-1 with Hierarchical Pores and Tunable Acid Sites Grown on Carbon Nanotubes Decorated Nickel Foam

作者：Zhang, Zheng[1];Cao, Gui-Ping[1];Cai, Qan[1];Lu, Hui[1];Ji, Shuang[1];Fang, Rui[1];Gao, Peng[1];Feng, Miao[1]

机构：[1]East China Univ Sci & Technol, UNILAB, State Key Lab Chem Engn, Shanghai 200237, Peoples R China

年份：2020

卷号：59

期号：7

起止页码：2761

外文期刊名：INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH

收录：;EI(收录号：20201008264836);WOS:【SCI-EXPANDED(收录号:WOS:000515213800012)】；

基金：This work was financially supported by the National Natural Science Foundation of China (21576091).

语种：英文

外文关键词：Nickel - Silicon compounds - Foams - Density functional theory - Silicon - Titanium - Propylene - Titanium compounds

摘要：The TS-1 particles grown on carbon nanotubes decorated nickel foam (denoted as MTS-1S) are successfully synthesized by a steam-assisted crystallization method that does not waste the gels and is more convenient, economical, and efficient than the traditional hydrothermal method. MTS-1S possesses a hierarchical porous structure of micropores, mesopores, and macropores and a high content of titanium in the skeleton, which is beneficial for the diffusion of reactants and products and exhibits excellent catalytic performance for the epoxidation of propylene. The impact of water on the formation of acid sites has been demonstrated by density functional theory (DFT). The acid sites of MTS-1S can be tuned by controlling the amount of water at the bottom of autoclave during steam-assisted crystallization, which significantly increases the selectivity to propylene oxide. Finally, the impact of acid sites of Si- OH and Ti-OH groups (Ti located in a defect structure, adjacent to Si-OH) on the byreaction of epoxidation of propylene is confirmed by simulation.