纳米TiO_2的制备、醋酸改性及催化性能研究  

Preparation, Modification and Application of Nanocrystalline Titania

作　　者：杨绪杰[1] 刘孝恒[1] 张梅[1] 陆路德[1] 汪信[1] 

机构地区：[1]南京理工大学化工学院,南京210094

出　　处：《材料导报》2002年第12期74-76,共3页Materials Reports

基　　金：南京市科委资助项目(编号:20012083)

摘　　要：在硬脂酸介质中,450～900℃温度下,得到不同结构的纳米TiO_2;将纳米TiO_2进行醋酸处理。用X射线衍射(XRD)和透射电子显微镜(TEM)对纳米TiO_2的微结构进行表征。发现,在相同温度下,经醋酸改性的纳米TiO_2具有较好的均匀和分散性。纳米TiO_2成功用于马来酸酐聚合反应。用红外(IR)和核磁共振(NMR)研究了相关单体和聚合物的结构。此外,对醋酸改性纳米TiO_2进行了光催化降解甲基橙研究。Various nanocrystalline TiO2 samples with different structures were obtained in stearic acid medium at 450~900℃,which were then treated with acetic acid.The microstructures of nanocrystalline TiO2 were characterized by XRD and TEM.It is found that the nanocrystalline TiO2 powder modified with acetic acid has better dispersion and homogeneity at the same treatment temperature.The nanocrystalline titania was successfully used to catalyze maleicanhydride polymerization,and the monomer and polymer were investigated by IR and NMR.In addition,the photocatalytic degradation ability of the nanocrystalline titania modified with acetic acid for methyl orange was also studied.

关 键 词：催化性能 纳米TIO2 醋酸 改性 结构表征 光催化降解 二氧化钛 光催化剂 

分 类 号：O643.36[理学—物理化学]