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在无定形二氧化钛上生长纳米钛硅分子筛催化剂
引用本文:王洪林,郭新闻,王祥生,张维萍,包信和,林励吾.在无定形二氧化钛上生长纳米钛硅分子筛催化剂[J].催化学报,1999,20(5):557-560.
作者姓名:王洪林  郭新闻  王祥生  张维萍  包信和  林励吾
作者单位:1. 大连理工大学碳资源综合利用开放实验室,大连,116012
2. 中国科学院大连化学物理研究所催化基础国家重点实验室,大连,116023
基金项目:国家自然科学基金;29792070;
摘    要:尺寸在1~100nm之间的材料称为纳米材料.纳米材料中表面分子占很大比例,由此产生了不同于常规材料的各种特殊性能.纳米材料在很多领域得到广泛的研究和应用.很多研究者发现纳米结构的催化剂有着与常规催化剂不同的催化活性和选择性.沸石分子筛催化剂是一种结晶的多孔物质,其孔径一般小于1 nm.

关 键 词:分子筛  TS-1  纳米  钛硅分子筛
收稿时间:1999-10-25

GROWING OF NANOSTRUCTURED TITANIUM-SILICALITE ON AMORPHOUS TITANIA AND ITS CATALYTIC ACTIVITY IN EPOXIDATION
Wang Honglin,GUO Xinwen,Wang Xiangsheng,Zhang Weiping,Bao Xinhe,Lin Liwu.GROWING OF NANOSTRUCTURED TITANIUM-SILICALITE ON AMORPHOUS TITANIA AND ITS CATALYTIC ACTIVITY IN EPOXIDATION[J].Chinese Journal of Catalysis,1999,20(5):557-560.
Authors:Wang Honglin  GUO Xinwen  Wang Xiangsheng  Zhang Weiping  Bao Xinhe  Lin Liwu
Abstract:Amorphous titania was added to the gel for titanium silicalite synthesis using TPABr as templating agent. In the hydrothermal condition, a nanostructured titanium silicalite grew on the amorphous titania owing to the restriction effect of titania. The resulting material had low XRD crystallinity (below 40%) but high IR crystallinity ( I 550 / I 450 >0 7). High resolution TEM showed that the material contained particles with dimension less than 50 nm. A typical catalyst with n (Si)/ n (Ti)=2 contained secondary porous structure with diameter of about 8 nm, which was disclosed by N 2 desorption data. The catalytic activity of TS/TiO 2 catalyst was even higher than TS 1 catalyst in epoxidation of 3 chloropropylene with aqueous hydrogen peroxide. A new cheap method to prepare the highly active catalyst for selective oxidation was provided.
Keywords:nanostructured zeolite  titanium  silicalite  supported catalyst  chloropropylene  epoxidation  
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