阳极氧化TiO2膜对甲基橙溶液的光催化性能研究

本试验利用阳极氧化的方法在纯钛基体上直接获得锐钛相T iO2多孔膜,解决T iO2光催化剂的涂敷固定问题。用场发射扫描电镜(F ie ld em iss ion scann ing e lectron m icroscope,FESEM)和X射线衍射仪(X-ray d iffractionm eter,XRD)对纯钛表面生成的T iO2多孔膜的形貌和晶体结构进行分析。以10m g/L甲基橙溶液为降解物进行光催化试验,分别研究了阳极氧化电压、溶液的初始pH值、T iO2膜的面积、T iO2膜的使用次数对降解率的影响。试验结果表明,当溶液初始pH值为1时,140V阳极氧化所得T iO2膜的光催化性能最好,同时随着T iO2膜使用次数的增加,但其光催化效果有所下降。

Photocatalytic Degradation of Methyl Orange on Anodic Oxidation TiO2 Films

The anatase TiO_2porous films are prepared on the surface of the pure titanium by an anodic oxidation method.The method solves the immobilization of the TiO_2photocatalyst.The morphology and the crystal structure of the TiO_2porous film are analyzed by field emission scanning electron microscope(FESEM) and X-ray diffraction meter(XRD).In the photocatalysis experiment the methyl orange is degraded and effects of the anodization voltage,the initial pH value of the solution,the TiO_2film area and the used times of the TiO_2film at the degradation rate are investigated.Results show that the TiO_2film prepared on 140 V voltage has the best photocatalysis for the methyl orange solution(pH=1),while the photocatalysis of the TiO_2film decreases with the increase of the used times.