通电加热氧化金属钛制备TiO_2薄膜及其光催化活性  

Characteristics and Photocatalytic Properties of TiO_2 Thin Film Prepared by Electrothermal Oxidation of Metal Titanium

作　　者：崔晓莉[1] 沃松涛[1] 贾晓婷[1] 任达森[1] 沈杰[1] 杨锡良[1] 章壮健[1] 

机构地区：[1]复旦大学材料科学系,上海200433

出　　处：《钛工业进展》2005年第1期24-26,共3页Titanium Industry Progress

基　　金：国家自然科学基金(基金号:20073011;20273018);上海市分子催化和功能材料重点实验室资助项目

摘　　要：应用在空气中电加热氧化的方法在金属钛表面制备了TiO2薄膜并通过XRD, SEM 以及 UV方法分别研究了其晶相结构、表面形貌及光催化活性.控制流过金属钛的电流密度,可以在表面形成TiO2薄膜.SEM和XRD测试表明形成的TiO2为线条状的金红石晶型的均一薄膜.光催化测试表明,电氧化TiO2薄膜具有良好的光催化活性,分解亚甲基蓝的速率常数为(4.2~5.8)×10-3 min-1.The preparation, structure and photocatalytic properties of titanium dioxide film formed by electrothermal oxidation of metal titanium were investigated by XRD, SEM and UV spectroscopy measurements. TiO2 thin film was prepared by electrothermal oxidation of metal titanium sheet through control of the current density. The resulting thin films characterized by X-ray diffraction (XRD) are rutile TiO2. The even films with strip observed by scanning electron microscopy (SEM) show good photocatalytic activity for the degradation of methyl blue under ultraviolet irradiation. The rate constant is determined to be ( 4.2 ~ 5.8 ) ×10-3 min-1, depending on the oxidative current during the preparation.

关 键 词：热氧化 制备 TIO2薄膜 光催化活性 晶型 XRD SEM 速率常数 电氧化 亚甲基蓝 

分 类 号：TB43[一般工业技术]