Zhou Minghua, Yu Jiaguo, Liu Shengwei, Zhai Pengcheng, Jiang Li
State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China.
J Hazard Mater. 2008 Jun 15;154(1-3):1141-8. doi: 10.1016/j.jhazmat.2007.11.021. Epub 2007 Nov 17.
SnO2/TiO2 composite films were fabricated on transparent electro-conductive glass substrates (F-doped SnO2-coated glass:FTO glass) via an electrophoretic deposition (EPD) method using Degussa P25 as raw materials, and were further characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), field emission scanning electron microscope (FESEM), UV-vis diffuse reflectance spectra and Photoluminescence spectra (PL). XRD and XPS results confirmed that the films were composed of TiO2 and SnO2. FESEM images indicated that the as-prepared TiO2 films had roughness surfaces, which consisted of nano-sized particles. The effects of calcination temperatures on the surface morphology, microstructures and photocatalytic activity of SnO2/TiO2 composite films were further investigated. All the prepared SnO2/TiO2 composite films exhibited high photocatalytic activities for photocatalytic decolorization of Rhodamine-B aqueous solution. At 400 degrees C, the SnO2/TiO2 composite films showed the highest photocatalytic activity due to synergetic effects of low sodium content, good crystallization, appropriate phase composition and slower recombination rate of photogenerated charge carriers.
以德固赛P25为原料，通过电泳沉积（EPD）法在透明导电玻璃基板（F掺杂的SnO₂涂层玻璃：FTO玻璃）上制备了SnO₂/TiO₂复合薄膜，并通过X射线衍射（XRD）、X射线光电子能谱（XPS）、场发射扫描电子显微镜（FESEM）、紫外-可见漫反射光谱和光致发光光谱（PL）对其进行了进一步表征。XRD和XPS结果证实薄膜由TiO₂和SnO₂组成。FESEM图像表明，制备的TiO₂薄膜表面粗糙，由纳米级颗粒组成。进一步研究了煅烧温度对SnO₂/TiO₂复合薄膜表面形貌、微观结构和光催化活性的影响。所有制备的SnO₂/TiO₂复合薄膜对罗丹明B水溶液的光催化脱色均表现出高光催化活性。在400℃时，由于低钠含量、良好的结晶、合适的相组成和光生电荷载流子较慢的复合速率的协同作用，SnO₂/TiO₂复合薄膜表现出最高的光催化活性。
