(1. 中國(guó)科學(xué)院 廣州能源研究所， 廣州 510070;
2. 廣東省生態(tài)環(huán)境與土壤研究所，
廣東省農(nóng)業(yè)環(huán)境綜合治理重點(diǎn)實(shí)驗(yàn)室， 廣州 510650)
摘 要: 采用電解氧化金屬鈦網(wǎng)的方法制備新型光電極Ti/TiO2，采用X射線衍射儀、激光拉曼光譜儀與掃描電鏡測(cè)試電極的表面晶體結(jié)構(gòu)與表面形態(tài)。以腐殖酸溶液的總有機(jī)炭(TOC)的變化來(lái)評(píng)價(jià)電極的光電催化氧化活性。結(jié)果表明，電解電壓與電流密度對(duì)電極表面的晶體組成、表面形態(tài)、孔隙大小與中心電子的結(jié)合能影響較大。電極制備的最佳電解電壓與電流密度分別為160?V，1100A/m2。光電催化氧化可為給水處理提供一種方便、高效的方法。
關(guān)鍵字: 光電極； 光電催化氧化； 腐殖酸； 水處理
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
