新型Ti/TiO_2电极的制备及其光电催化氧化活性  

Preparation and properties of innovative Ti/TiO_2 mesh photoelectrode for methyl orange photoelectrocatalytic

作　　者：李芳柏[1,2] 王良焱[1] 李新军[1] 黄琮[1] 

机构地区：[1]中国科学院广州能源研究所 [2]广东省生态环境与土壤研究所,广东省农业环境综合治理重点实验室,广州510650

出　　处：《中国有色金属学报》2001年第6期977-981,共5页The Chinese Journal of Nonferrous Metals

基　　金：广东省自然科学基金资助项目 ( 0 10 15 1);广东省科技计划资助项目 (C315 0 7)

摘　　要：采用电解氧化金属钛网的方法制备新型光电极Ti/TiO2 ,采用X射线衍射仪、激光拉曼光谱仪与扫描电镜测试电极的表面晶体结构与表面形态。以腐殖酸溶液的总有机炭 (TOC)的变化来评价电极的光电催化氧化活性。结果表明 ,电解电压与电流密度对电极表面的晶体组成、表面形态、孔隙大小与中心电子的结合能影响较大。电极制备的最佳电解电压与电流密度分别为 16 0V ,110 0A/m2 。光电催化氧化可为给水处理提供一种方便、高效的方法。A new type of photoelectrode was innovated by anodising titanium mesh in H 2SO 4 solution and named Ti/TiO 2 mesh electrode. The structural and surface morphologies of the Ti/TiO 2 mesh were examined by X ray diffractometer, laser Raman spectrography, scanning electronic microscopy (SEM) respectively. The results indicate that its crystal structure, morphology and the size of pore are affected greatly by the anodisation voltage and current density. The photoelectrocatalytic (PEC) oxidation of Humic acid solution using the Ti/TiO 2 mesh was investigated. The results demonstrate that Ti/TiO 2 mesh prepared at 160?V and 1?100?A·m 2 has the best PEC activity.

关 键 词：光电极 光电催化氧化 腐殖酸 水处理 有机污染物 

分 类 号：X5[环境科学与工程—环境工程] X703