发光学报, 2015, 36 (9): 996, 网络出版: 2015-10-22
Cu掺杂SnO2/TiO2复合薄膜的制备及性能研究
Preparation and Properties of Cu-doped SnO2/TiO2 Film
摘要
制备Cu掺杂的纳米SnO2/TiO2溶胶, 采用旋涂法在载玻片上镀膜, 经干燥、煅烧制得Cu掺杂的SnO2/TiO2薄膜, 通过对比实验探讨掺杂比例、条件、复合形式等对结构和性能的影响。采用XRD、SEM、EDS、UV-Vis等测试手段对样品进行表征, 并以甲基橙为探针考察了其光催化降解性能。XRD测试结果显示薄膜的晶型为锐钛矿型, 结晶度较高。SEM谱图显示薄膜表面无明显开裂, 粒子分布均匀, 粒径约为20 nm。EDS测试结果表明薄膜材料中含有Cu元素, 谱形一致。UV-Vis吸收光谱表明Cu掺杂以及SnO2/TiO2的复合使得在近紫外区的光吸收比纯TiO2明显增强。光催化实验表明Cu掺杂后使得SnO2/TiO2复合薄膜对甲基橙的光催化降解效率进一步提高, SnO2/TiO2复合薄膜的光催化活性在10%Cu掺杂时达到最高。
Abstract
Cu-doped nano-SnO2TiO2 gelatins were prepared and coated onto glass substrates by spin coating method, followed by drying at low temperature and calcined at high temperature. The films were characterized by XRD, SEM, EDS, and UV-Vis. The photocatalysis degradation efficiency was studied by using methyl orange as probe. XRD patterns show that the films are anatase structure. SEM images show that the surfaces of the films are flat without obvious crack, and the average diameter is about 20 nm. EDS results indicate that Cu has been introduced to SnO2/TiO2 films. UV-Vis absorption spectra show that the absorbance of Cu-doped SnO2/TiO2 films at visible region increase comparing to pure TiO2 film. The degradation experiment under UV light shows that the photocatalysis degradation efficiency of Cu-doped SnO2/TiO2 film is higher than that of pure TiO2 film. The photocatalysis degradation efficiency is the biggest when the doping mole fraction of Cu is 10%.
王国栋, 魏长平, 何瑞英, 伞靖, 彭春佳. Cu掺杂SnO2/TiO2复合薄膜的制备及性能研究[J]. 发光学报, 2015, 36(9): 996. WANG Guo-dong, WEI Chang-ping, HE Rui-ying, SAN Jing, PENG Chun-jia. Preparation and Properties of Cu-doped SnO2/TiO2 Film[J]. Chinese Journal of Luminescence, 2015, 36(9): 996.