摘要
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.
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.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
1999年第5期557-560,共4页
基金
国家自然科学基金
关键词
钛硅沸石
催化剂
氯丙烯
环氧化
分子筛
纳米级
nanostructured zeolite, titanium silicalite, supported catalyst, chloropropylene, epoxidation
