中文摘要：

采用溶胶-凝胶法制备了Fe、N共掺杂TiO_2膜电极（Fe,N-TiO_2/Ti）,并设计三因素五水平正交试验对电极制备条件进行优化.结果表明,各因素影响主次顺序为：煅烧温度〉Fe掺杂量〉N掺杂量;最优制备条件为：煅烧温度550℃,Fe掺杂量0.3%（质量分数）,N掺杂量0.3%（质量分数）;共掺杂电极光催化活性优于单掺杂和未掺杂电极.紫外-可见漫反射和光电性能测试表明,催化剂有可见光响应;XRD表征结果表明,Fe、N共掺杂细化了晶粒,有效抑制了金红石相的形成,其晶型为锐钛矿型,粒径为11.48 nm.利用Fe,N-TiO_2/Ti与Cu阴极组装成斜置双极液膜反应器,可见光激发光催化降解苋菜红,考察了主要影响因素.结果发现,最佳条件为：初始pH 2.50,废水流量5.1 L·h~（-1）,在此条件下处理20mg·L~（-1）苋菜红80 min,脱色率达到91.6%.电极重复使用10次,每次60 min,脱色率下降了12.99%,说明电极稳定性较好.

英文摘要：

Fe,N co-doped TiO_2/ Ti electrode（ Fe,N-TiO_2/ Ti） was prepared by sol-gel method and orthogonal tests L25（ 53） were designed to optimize the preparation conditions. The results show that the influence on Fe,N co-doped TiO_2/ Ti follows the sequence： calcination temperature,doping concentrations of Fe and doping concentrations of N.Compared with single-doped membrane electrode（ Fe-TiO_2/ Ti,N-TiO_2/ Ti） and pure TiO_2/ Ti,Fe,N-TiO_2/ Ti displayed higher photocatalytic activity under the optimum conditions： 550 ℃ for calcination temperature,Fe 0. 3% and N 0. 3%. the performance of optimized photoelectrode under visible light were tested by using UV-vis diffuse reflectance spectroscopy（ DRS）.The morphology structure was characterized by using X-ray diffraction（ XRD）,indicating that codoping Fe,N refined the grain TiO_2/ Ti photocatalyst with particle diameter of11.48 nm and inhibited its crystal transformation from anatase to rutile.Finally,the obtained Fe,N-TiO_2/ Ti was used as photoanode to assemble a dual slant-placed electrodes thin-film reactor with Cu cathode. Results of photocatalytic degradation of amaranth show that the decolorization efficiency of20 mg·L~（-1） amaranth reached 91.6% in 80 min under the optimal treatment conditions of initial pH 2.50,circulating flux 5.1 L·h~（-1）. In addition,good catalytic activity was remained after reusing co-doped photoelectrode for 10 times（ each lasted 60 min）（ only decreased 12. 99% of decolorization efficiency）,suggesting the good stability of the Fe,N-TiO_2/ Ti photoelectrode