化学学报 ›› 2006, Vol. 64 ›› Issue (14): 1411-1415.    下一篇

研究论文

微波合成TS-1分子筛的催化性能研究

杨迎春*,1,2,李鹤2,何登华2,王喻2,3,徐成华*,1,2,邱发礼2,叶芝祥1   

  1. (1成都信息工程学院环境工程系 成都 610041)
    (2中国科学院成都有机化学研究所 成都 610041)
    (3四川建筑职业技术学院 德阳 618000)
  • 收稿日期:2005-11-27 修回日期:2006-03-16 出版日期:2006-07-28 发布日期:2006-07-28
  • 通讯作者: 杨迎春

Study on the Catalytic Properties of TS-1 Molecular Sieves Synthe-sized under Microwave Irradiation

YANG Ying-Chun*,1,2, LI He2, HE Deng-Hua2, WANG Yub,3, XU Cheng-Hua*,1,2, QIU Fa-Li2, YE Zhi-Xiang1   

  1. (1 Department of Environmental Engineering, Chengdu University of Information Technology, Chengdu 610041)
    (2 Chengdu Institute of Organic Chemistry, Chinese Academy of Sci-ences, Chengdu 610041)
    (3 Sichuan College of Architecture Professional Technology, Deyang 618000)
  • Received:2005-11-27 Revised:2006-03-16 Online:2006-07-28 Published:2006-07-28
  • Contact: YANG Ying-Chun

采用微波加热技术法合成TS-1分子筛, 以30%的H2O2水溶液为氧化剂, 考察了所合成的TS-1分子筛在苯乙烯和1-己烯环氧化反应中的催化性能, 并与传统水热法合成的TS-1进行了比较. 结果表明, 由微波合成TS-1的催化性能比传统水热法合成的TS-1更为优异. 采用XRD, FT-IR, UV-vis, SEM等手段对二者进行表征, 发现微波合成的TS-1晶粒与晶粒之间存在“粘连”现象, 这种现象降低了分子筛表面硅羟基含量, 增加了TS-1分子筛的疏水性, 使得分子筛对反应底物苯乙烯和1-己烯的吸附能力增强, 从而导致催化性能显著提高.

关键词: 微波辐射, TS-1, 苯乙烯, 1-己烯, 环氧化, 疏水性

Titanium silicate-1 (TS-1) was synthesized under microwave irradiation. Their catalytic property was investigated by the epoxidations of styrene and 1-hexene with 30% H2O2 as oxidant, which is better than that of TS-1 synthesized by conventional hydrothermal methods. Characterization of two kinds of TS-1 were carried out by technologies such as XRD, IR, UV-vis and SEM, etc. The crystal particles of TS-1 molecular sieve from microwave irradiation (TS1-MI) were found to exhibit an adhered columnar morphology and less silanol groups than those from the conventional method (TS1-CM). The better catalytic properties of TS1-MI were deduced to be due to its higher hydrophobicity, which comes from the consumption of surface silanol groups between TS-1 particles. The higher hydrophobicity of TS1-MI can increase the adsorption capacity leading to a higher catalytic activity.

Key words: microwave irradiation, TS-1 molecular sieves, styrene, 1-hexene, epoxidation, hydrophobicity