title: Effects of calcination temperatures on photocatalytic activity of SnO2/TiO2 composite films prepared by an EPD method.
abstract: 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.
authors: State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, PR China.
authors: Minghua
authors: M
authors: Zhou
authors: Jiaguo
authors: J
authors: Yu
authors: Shengwei
authors: S
authors: Liu
authors: Pengcheng
authors: P
authors: Zhai
authors: Li
authors: L
authors: Jiang
mesh_terms: D002384:Catalysis; D004396:Coloring Agents / Q000737:chemistry / Q000528:radiation effects; D006358:Hot Temperature; D010777:Photochemistry; D012235:Rhodamines / Q000737:chemistry / Q000528:radiation effects; D017971:Tin Compounds / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000528:radiation effects; D014961:X-Ray Diffraction
chemical_list: D004396:Coloring Agents; D012235:Rhodamines; D017971:Tin Compounds; D014874:Water Pollutants, Chemical; C009495:titanium dioxide; D014025:Titanium; C029773:rhodamine B; C045358:stannic oxide