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Hydrothermal synthesis of mesoporous titanosilicate with the aid of amphiphilic organosilane

机译:两亲性有机硅烷水热合成介孔钛硅酸盐

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摘要

Mesoporous MFI-type titanosilicates (TS-1) were hydrothermally synthesized with the aid of amphiphilic organosilane and the effects of the amphiphilic organosilane on the structural and textural properties of the resultant materials were investigated. The physicochemical properties of the samples were characterized by various techniques and their catalytic performance was investigated by the epoxidation of cyclohexene with hydrogen peroxide. The content of organosilane added was essential for the formation of uniform mesopore in TS-1, and greatly influenced the crystallinity. Highly crystallined TS-1 with uniform mesopores of 3.7 nm diameter was successfully synthesized. The mesoporous TS-1 preserved tetrahedrally coordinated Ti ions in the framework, but it was featured with more hydrophobic surface and less defect sites in comparison to conventional TS-1. Mesoporous TS-1 showed a higher conversion for the epoxidation of cyclohexene owing to an easier access of bulky molecules to the catalytic active sites. Mesoporous TS-1's higher hydro-phobicity made its epoxide selectivity two times as much as that of conventional TS-1.
机译:借助两亲性有机硅烷水热合成了介孔的MFI型钛硅酸盐(TS-1),并研究了两亲性有机硅烷对所得材料的结构和织构性质的影响。用各种技术表征了样品的理化性质,并通过过氧化氢环己烯的环氧化研究了其催化性能。添加的有机硅烷含量对于在TS-1中形成均匀的中孔至关重要,并极大地影响了结晶度。成功合成了具有均匀中孔直径3.7 nm的高结晶度TS-1。中孔TS-1在框架中保留了四面体配位的Ti离子,但与常规TS-1相比,它具有更多的疏水表面和更少的缺陷位。由于大分子更容易进入催化活性位,中孔TS-1对环己烯的环氧化显示出更高的转化率。中孔TS-1的较高疏水性使其环氧选择性是传统TS-1的两倍。

著录项

  • 来源
    《Journal of porous materials》 |2010年第4期|P.399-408|共10页
  • 作者单位

    Shanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, North Zhongshan Road 3663, Shanghai 200062, China;

    rnShanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, North Zhongshan Road 3663, Shanghai 200062, China;

    rnShanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, North Zhongshan Road 3663, Shanghai 200062, China;

    rnShanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, North Zhongshan Road 3663, Shanghai 200062, China;

    rnShanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, North Zhongshan Road 3663, Shanghai 200062, China;

    rnShanghai Key Laboratory of Green Chemistry and Chemical Processes, Department of Chemistry, East China Normal University, North Zhongshan Road 3663, Shanghai 200062, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    mesoporous zeolite; titanosilicate; MFI; amphiphilic organosilane; oxidation;

    机译:介孔沸石钛硅酸盐MFI;两亲性有机硅烷氧化;

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