用高温热水解法制备高活性TiO_2纳米微晶光催化剂  

Preparation of High Photocatalytic Activity Nano-crystalline Titanium Dioxide by High Temperature Thermo-Hydrolysis Method

作　　者：赵文宽[1] 方佑龄[1] 董庆华[1] 

机构地区：[1]武汉大学化学系,武汉430072

出　　处：《物理化学学报》1998年第5期424-428,共5页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金;环境水化学国家重点实验室开放基金

摘　　要：采用钛酸四西酯在有机溶剂中高温热水解与结晶同时进行的方法，制备了二氧化钛纳米微晶光催化剂．以XRD、BET、TEM、TG和DTA等方法对获得的微晶进行了表征．所制得的TiO2纳米微晶平均值径约为12nm，比表面积在100m2·g-1以上，并能在报宽的煅烧温度范围内保持锐钛矿型晶体结构．将它应用于光分解甲基橙，具有高的光催化活性．Nano-crystalline titanium oxide(TiO2) was prepared by the high-temperature thermo-hydrolysis method and crystallized in organic media. Microcrystalline was characterized by TG-DTA, XRD, BET and TEM methods, the average diameter of this titanium dioxide is 12nm withthe surface area greater than 100m2.g-1, and the crystal is of anatase structure over a relativewide temperature range. The photocatalytic activity of this titanium oxide was determminated bymeasuring the rate of degradation of methyl orange and the rate of formation of degradation prod-uct. The results showed that this titanium oxide has much higher photocatalytic activity.

关 键 词：二氧化钛 光催化剂 制备 纳米微晶 

分 类 号：O643.36[理学—物理化学] O614.411[理学—化学]