规整中孔TiO_2微球的均相沉淀合成及其在环戊烯氧化反应中的应用  

Preparation of Core-shell Titania Spheroid with Mesoporous Structure and the Application in Synthesis of Glutaraldehyde

作　　者：郭昌文[1] 戴维林[1] 曹勇[1] 范康年[1] 

机构地区：[1]复旦大学化学系,上海市分子催化与创新材料重点实验室,上海200433

出　　处：《高等学校化学学报》2003年第6期1097-1099,共3页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金 (批准号 :2 0 0 730 0 9) ;上海市科委基础研究重点项目 (批准号 :0 2 DJ14 0 2 1);上海市教委曙光计划项目 (批准号 :0 2 SG0 4)资助

摘　　要：A novel process for preparation of micrometer-scale functional materials without organic templates has been demonstrated. Titania spheroid with a tailored core-shell structure and high ordered mesoposity has been manipulated in the ethanol hydrothermal system containing ammonia sulfate as a dispersant. Titania spheroid with a mean diameter of 3.6 μm and a high specific surface area of 266 m 2/g has been synthesized by precipitating titanium tetrachloride with ammonia gas released from hydrolysis of urea at a high temperature. A special core-shell structure with a 100 nm thin shell and a 300 nm spacing strip interiors has been characterized by SEM & TEM. The catalytic performance of the titania spheoid supported WO 3 catalyst for the selective oxidation of cyclopentene(CPE) to glutaraldehyde(GA) has been investigated. The WO 3/TiO 2 spheroid catalyst displays an exciting prospect for good selectivity(72.9%) toward GA and a high GA yield(about 70%) for the titled reaction using aqueous H 2O 2 as the oxidant.A novel process for preparation of micrometer-scale functional materials without organic templates has been demonstrated. Titania spheroid with a tailored core-shell structure and high ordered mesoposity has been manipulated in the ethanol hydrothermal system containing ammonia sulfate as a dispersant. Titania spheroid with a mean diameter of 3.6 μm and a high specific surface area of 266 m 2/g has been synthesized by precipitating titanium tetrachloride with ammonia gas released from hydrolysis of urea at a high temperature. A special core-shell structure with a 100 nm thin shell and a 300 nm spacing strip interiors has been characterized by SEM & TEM. The catalytic performance of the titania spheoid supported WO 3 catalyst for the selective oxidation of cyclopentene(CPE) to glutaraldehyde(GA) has been investigated. The WO 3/TiO 2 spheroid catalyst displays an exciting prospect for good selectivity(72.9%) toward GA and a high GA yield(about 70%) for the titled reaction using aqueous H 2O 2 as the oxidant.

关 键 词：中孔TiO2微球 均相沉淀 合成 环戊烯 氧化反应 戊二醛 二氧化钛 氧化钨 催化剂 

分 类 号：O623.513[理学—有机化学] O643.36[理学—化学]