期刊
MATERIALS RESEARCH BULLETIN
卷 46, 期 5, 页码 698-701出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.materresbull.2011.01.015
关键词
Microporous materials; Sol-gel chemistry; Catalytic properties
资金
- National Science Foundation of China [20873042]
- Shanghai Leading Academic Discipline Project [B409]
- ECNU [2009014]
Hierarchical nano-crystalline TS-1 can be directly synthesized using tetrapropylammonium hydroxide (TPAOH) as single template in the presence of a 'seed' gel. The hierarchical nano-crystalline TS-1 was characterized by scanning electron microscopy, transmission electron microscopy, powder X-ray diffraction, UV-Vis diffuse reflectance spectroscopy and nitrogen adsorption-desoprtion. Compared with the conventional TS-1, the hierarchical nano-crystalline TS-1 contained an additional porosity including supermicro/mesopores, which attributed to the interstitial voids existing between the nanocrystals. The secondary porosity in the TS-1 material provided an enhanced external surface area and high mesopore volume in favor of fast diffusion of both reactants and products, which resulted in an enhanced activity in the epoxidation of bulky molecules cyclohexene using aqueous H2O2 solution as oxidant. (C) 2011 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据