介孔TiO_2粉体的合成和表征及光催化性能研究  

Synthesis and characterization of mesoporous titanium dioxide and study on its photocatalytic activity

作　　者：张维光[1] 张莉莉[1] 陆路德[1] 杨绪杰[1] 汪信[1] 

机构地区：[1]南京理工大学材料化学实验室

出　　处：《化学研究与应用》2005年第5期592-595,共4页Chemical Research and Application

基　　金：江苏省自然科学基金(BK2002100)资助项目;江苏省教委自然科学基金(03KJD150051)资助项目

摘　　要：本文以甘油为结构导向剂,运用水热合成法制备了介孔二氧化钛粉体(MT),采用抽提和焙烧两种方法除去结构导向剂。分别对合成的样品、P25和商品TiO2粉末(PT)进行了XRD、TEM、TGA、N2等温吸附—脱附等实验表征,根据TGA计算了样品的表面羟基密度。研究了样品光催化降解甲基橙效率与其表面性质的关系。结果表明,经焙烧除去结构导向剂的样品的比表面最高,达285.3m2.g-1,孔径4nm^6nm,具有良好的光催化降解甲基橙性能。The mesoporous TiO2 power was synthesized using a nonsurfactant glycerol as a structure - directing agent by hydrothermal methods. The obtained products, P25 and TiO2 commodity of product were characterized by XRD ,TEM ,TGA,N2 adsorption method. The density of surface hydroxyl of titania powers was calculated using the TGA weight loss and the surface area. We also studied the relationship between the density of surface hydroxyl and its photo catalytic activity in the degradation of methyl orange. It was found that the surface area of MT2 was highest, ca. 285.3m2·g^-1 and the pore diameter was 4nm - 6nm Its photo catalytic activity was good.

关 键 词：介孔TIO2 表面羟基密度 表征 光催化降解 

分 类 号：O614.411[理学—无机化学]