(1. 中国科学院 广州能源研究所， 广州 510070;
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)
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160?V，1100A/m2。光电催化氧化可为给水处理提供一种方便、高效的方法。
关键字: 光电极； 光电催化氧化； 腐殖酸； 水处理
photoelectrode for methyl orange photoelectrocatalytic
（1. Guangzhou Institute of Energy Conversion， Chinese Academy of Sciences，
Guangzhou 510070, P.R.China；
2. Guangdong Institute of EcoEnvironment and Soil Sciences，
Guangdong Key Laboratory of Agricultural Environment Integrated Control，
Guangzhou 510650, P.R.China）
Abstract:A new type of photoelectrode was innovated by anodising titanium mesh in H2SO4 solution and named Ti/TiO2 mesh electrode. The structural and surface morphologies of the Ti/TiO2 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/TiO2 mesh was investigated. The results demonstrate that Ti/TiO2 mesh prepared at 160V and 1100A·m2 has the best PEC activity.
Key words: photoelectrode; photoelectrocatalytic oxidation; humic acid; water treatment
