采用多靶磁控溅射离子镀技术制备TiO2-ZnO和(TiO2-ZnO)/TiO2两种不同结构的复合薄膜.研究薄膜在pH值分别为5、7和9时对甲基橙的降解,并结合薄膜光催化实验后的透光率、表面形貌和电化学腐蚀性能,探讨TiO2顶层对TiO2-ZnO异质复合薄膜光催化活性的影响.结果表明:两种薄膜的光催化活性均在酸性中最好,依次为碱性和中性,但(TiO2-ZnO)/TiO2薄膜的降解率和降解速率始终高于TiO2-ZnO薄膜,且酸、碱性环境下更明显.光催化实验后,(TiO2-ZnO)/TiO2薄膜表面无变化,TiO2-ZnO薄膜出现明显的腐蚀、溶解形貌,且薄膜透光率在不同环境中的变化相差4～5倍.在不同pH值的3.5wt％ NaCl溶液中,(TiO2-ZnO)/TiO2复合薄膜的腐蚀电位和腐蚀电流均优于TiO2-ZnO薄膜.由于TiO2顶层良好的耐酸碱腐蚀性能,(TiO2-ZnO)/TiO2薄膜在pH值较大范围的溶液中表现出更好的光催化活性.
参考文献
| [1] | 荆洁颖,冯杰,李文英.纳米二氧化钛光催化降解喹啉动力学[J].燃料化学学报,2012(03):380-384. |
| [2] | Xiang, Q.;Yu, J.;Wong, P.K. .Quantitative characterization of hydroxyl radicals produced by various photocatalysts[J].Journal of Colloid and Interface Science,2011(1):163-167. |
| [3] | 寇钢,白力静,龚振瑶,赵志明.磁控溅射（TiO2-ZnO）/TiO2梯度复合薄膜的制备及光致亲水性研究[J].人工晶体学报,2012(01):94-99. |
| [4] | 丁士文,王利勇,张绍岩,刘淑娟,丁宇,刘燕朝,康全影.纳米TiO2-ZnO复合材料的合成、结构与光催化性能[J].无机化学学报,2003(06):630-635. |
| [5] | 曹永强,龙绘锦,陈咏梅,曹亚安.金红石/锐钛矿混晶结构的TiO2薄膜光催化活性[J].物理化学学报,2009(06):1088-1092. |
| [6] | 吕霞,彭同江,孙红娟,古朝建.TiO2/蒙脱石复合物中纳米TiO2的相变与光催化性能[J].人工晶体学报,2013(02):290-298. |
| [7] | Mehmet Konyar;H.Cengiz Yatmaz;Koray OEztuerk .Sintering temperature effect on photocatalytic efficiencies of ZnO/TiO_2 composite plates[J].Applied Surface Science: A Journal Devoted to the Properties of Interfaces in Relation to the Synthesis and Behaviour of Materials,2012(19):7440-7447. |
| [8] | 吕佩伟,胡海龙,裴瑜,林丽梅,赖发春.In2O3和ZnO混合薄膜的化学腐蚀特性研究[J].光电子·激光,2010(08):1210-1213. |
| [9] | 杨凯,余长林,张丽娜,余济美.BiOCl/ZnO异质结型复合光催化剂的水热合成及其光催化性能[J].人工晶体学报,2012(01):171-176. |
| [10] | 常大磊,李小松,赵天亮,朱爱民.大气压射频等离子体化学气相沉积TiO2体系的发射光谱诊断[J].物理化学学报,2013(03):625-630. |
| [11] | Kim KE;Jang SR;Park J;Vittal R;Kim KJ .Enhancement in the performance of dye-sensitized solar cells containing ZnO-covered TiO2 electrodes prepared by thermal chemical vapor deposition[J].Solar Energy Materials and Solar Cells: An International Journal Devoted to Photovoltaic, Photothermal, and Photochemical Solar Energy Conversion,2007(4):366-370. |
| [12] | M.H. Abdullah;L.N. Ismail;M.H. Mamat;M.Z. Musa;M. Rusop .Novel encapsulated ITO/arc-ZnO:TiO_2 antireflective passivating layer for TCO conducting substrate prepared by simultaneous radio frequency-magnetron sputtering[J].Microelectronic engineering,2013(Aug.):138-144. |
| [13] | Haiqiang Wang;Zhongbiao Wu;Yue Liu .The characterization of ZnO-anatase-rutile three-component semiconductor and enhanced photocatalytic activity of nitrogen oxides[J].Journal of molecular catalysis, A. Chemical,2008(1/2):176-181. |
| [14] | N. Naseria;M. Yousefia;A.Z. Moshfegh .A comparative study on photoelectrochemical activity of ZnO/TiO2 and TiO2/ZnO nanolayer systems under visible irradiation[J].Solar Energy,2011(9):1972-1978. |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%