Preparation, characterization, and catalytic performance of a novel methyl-rich Ti-HMS mesoporous molecular sieve with high hydrophobicity |
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| Authors: | XueFeng Li ZhiHong Xu HuanXin Gao QingLing Chen |
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| Affiliation: | 1. College of Chemistry and Chemical Engineering, Xuchang University, Xuchang, 461000, China
2. Shanghai Research Institute of Petrochemical Technology, Shanghai, 201208, China
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| Abstract: | A novel methyl-rich Ti-containing hexagonal mesoporous silica (Ti-HMS) molecular sieve with high hydrophobicity has been prepared by a two-step method involving co-condensation followed by vapor-phase methyl grafting. The sample was characterized by XRD, N2 adsorption, FTIR, UV-visible and 29Si NMR spectroscopies, TG, ICP-AES, and hydrophilicity measurements, and its catalytic performance was evaluated using the epoxidation of cyclohexene as a probe reaction. The Ti-HMS material retains a typical mesoporous structure and compared with a co-condensed Ti-HMS prepared in a one-step method possesses more methyl groups and higher hydrophobicity, and also exhibits better catalytic activity and selectivity. |
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