采用溶胶-凝胶法制备出纳米X- TiO2(X=Ce,Bi)粉体,并用XRD、UV-Vis DRS对其进行表征,以500W氙灯模拟太阳光,考察改性TiO2粉体的可见光催化活性.采用涂覆法制备出改性TiO2电极,以300W高压汞灯为侧光源,考察了电极的光电催化性能.实验结果表明:改性TiO2粉体均为锐钛矿型晶相,Ce和Bi的加入不同程度地提高了TiO2在可见光区的吸光强度,Bi和Ce最佳摩尔掺杂量均为0.04％.3种电极光电催化性能先后排序为:TiO2电极＜0.04％Bi-TiO2电极＜0.04％Ce-TiO2电极,循环伏安曲线分析表明,金属离子的掺杂提高了TiO2电极的电催化活性,且Ce的掺杂对电极电催化活性的影响大于Bi.HPLC分析表明,金属离子掺杂使得苯环开环加速,促进了苯酚的氧化过程.
参考文献
| [1] | Fujishima A .Electrochemical photolysis of water at a semiconductor electrode[J].Nature,1972,238:37-38. |
| [2] | 苏碧桃,朱平武,许晶晶,赵丽.ZnTiO3-TiO2纳米复合材料的光催化性能[J].应用化学,2011(01):33-38. |
| [3] | 邓安平,杨静,汪淑廉,黄应平,杨勇.混晶纳米TiO2的制备及其光催化降解有毒有机污染物[J].环境科学,2010(12):2965-2972. |
| [4] | Pedro Salvador .Mechanisms of water photooxidation at n-TiO_2 rutile single crystal oriented electrodes under UV illumination in competition with photocorrosion[J].Progress in Surface Science,2011(1/2):41-58. |
| [5] | Chiarello, G.L.;Aguirre, M.H.;Selli, E. .Hydrogen production by photocatalytic steam reforming of methanol on noble metal-modified TiO_2[J].Journal of Catalysis,2010(2):182-190. |
| [6] | 钱天才,牟雷,周烈兴.TiO_2掺杂Ce和La离子薄膜的微结构与光催化性能[J].材料工程,2010(01):58-61. |
| [7] | 刘兴,李越湘.高效稳定的Al~（3+）偶联多层Eosin Y敏化TiO_2光催化制氢体系研究[J].分子催化,2010(01):71-76. |
| [8] | 赵凤伟,宋寒,尚静,汪青.TiO2-CuPcTs敏化薄膜光电流及可见光光催化性能[J].分子催化,2010(04):372-377. |
| [9] | Rapid synthesis, characterization and optical properties of TiO_2 coated ZnO nanocomposite particles by a novel microwave irradiation method[J].Materials Research Bulletin: An International Journal Reporting Research on Crystal Growth and Materials Preparation and Characterization,2010(10):1383-1388. |
| [10] | 陈华军,尹国杰,吴春来.纳米Bi2O3/TiO2复合光催化剂的制备及性能研究[J].环境工程学报,2008(11):1516-1518. |
| [11] | 雷波,徐悦华,郭来秋,罗海燕.Ce-TiO2/硅藻土的制备、表征及其光催化活性[J].中国有色金属学报,2007(05):795-799. |
| [12] | Qifeng Chen;Dong Jiang;Weimei Shi;Dong Wu;Yao Xu .Visible-light-activated Ce-Si co-doped TiO_2 photocatalyst[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2009(18):8048-8053. |
| [13] | 丁海洋,冯玉杰,刘峻峰.采用循环伏安与Tafel曲线比较不同阳极的电催化性能[J].催化学报,2007(07):646-650. |
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