Nanometer Ce/TiO2 functional materials with photocatalystic antibacterial properties were prepared by dipping TiO2 nanometer powders into RE( NO3 )·nH2O solutions, filtrating, drying and heat treatment, and the enhancement mechanisms of Ce on the nanometer TiO2 were studied by electronic spin resonance(ESR) The results show that TiO2 for photocatalystic antibacterial properties is strengthened evidently by adding Ce, which has a high efficiency of photocatalystic antibacterial properties with the light extent of visible light and ultraviolet radiation. The basic reason for obtaining the strengthened result is that the effective wave length of photocatalystic properties of TiO2 can be expanded to visible light area with the induction of the rare earth elements, whether or not ultraviolet light exists, nanometer TiO2 can produce a great deal of hydroxylic radical(·OH) by treating with rare earth elements.
参考文献
| [1] | Fujishima A;Honda K .Electrochemical photolysis of water at a semiconductor electrode[J].Nature,1972,238:37. |
| [2] | Hoffman M R;Martin S T;Choi W et al.Environmental applications of semiconductor photocatalysis[J].Chemical Reviews,1995,95:69. |
| [3] | Linsebigler A L;Lu G Q;Yates J T .Photocatalysis on TiO2 surfaces: principle, mechanisms, and selected results[J].Chemical Reviews,1995,95:735. |
| [4] | Yu J G;Zhao X J;Hah J J et al.Phase structure and average crystralling size of TiO2/SiO2 composite thin films[J].硅酸盐学报,2001,29(03):286. |
| [5] | Liang J S;Feng Y W;Liang G C et al.Microstructure and photocatalystic activity of TiO2 composite films containing fine tourmaline powders[J].Journal of the Chinese Ceramic Society(in Chinese),2004,32:652. |
| [6] | 梁金生,金宗哲,王静.稀土/纳米TiO2的表面电子结构[J].中国稀土学报,2002(01):74-76. |
| [7] | Liang J S;Jin Z Z;Wang J .Study on surface energy band structures of m/TiO2 nanometer materials for cleaning-up environment[J].硅酸盐学报,2001,29(05):500. |
| [8] | Liang J S;Feng Y W;Liang G C et al.Effects of post-treatment on the photocatalytic activity of mesoporous TiO2 thin films[J].Journal of Materials Science Letters,2003,22:1503. |
| [9] | Li Z;Flytzanic Stephanopoulos M .Selective catalytic reduction of nitric oxide by methane over cerium and silver ion-exchanged ZSM-5 zeolites[J].Applied Catalysis A:General,1997,165:15. |
| [10] | Li Zhijiang;Flytzani-Stephanopoulos Maria .On the Promotion of Ag-ZSM-5 by Cerium for the SCR of NO by Methane[J].Journal of Catalysis,1999(2):313-327. |
| [11] | Yu Jimmy C;Lin Jun;Kwok Raymund W M .Enhanced photocatalytic activity of Ti1-xVxO2 solid solution on the degradation of acetone[J].Journal of Photochemistry and Photobiology A:Chemistry,1997,111:199. |
| [12] | Yu J G;Yu Ji M;Cheng B et al.Photocatalytic activity and characterization of the sol*gel derived Pbdoped TiO2 thin films[J].Journal of Sol-Gel Science and Technology,2002,24:39. |
| [13] | Yu J G;Zhao X J .Effect of substrates on the photocatalytic activity of nanometer TiO2 thin films[J].Materials Research Bulletin,2000,35:1293. |
| [14] | Zhou Q;Sun X Q;Zhang S J et al.FTIR Microscope study on the change of membrane protein and lipids of erythrocyte dam aged by free radicals[J].光谱学与光谱分析,1998,2:162. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%