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閱讀：263 發(fā)布時(shí)間：2014-8-15
文獻(xiàn)名： Effects of calcination temperature on microstructures and photocatalytic activity of titanate nanotube films prepared by an EPD method
作者： Jiaguo Yu1,3 and Minghua Zhou1,2
1 State Key Laboratory of Advanced Technology for Material Synthesis and Processing, Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, People's Republic of China
2 Staff Room of Chemistry, Yunyang Medical College, Shiyan 442000, Hubei, People's Republic of China
3 Author to whom any correspondence should be addressed
摘要： Titanate nanotube films are fabricated on F-doped SnO2-coated glass substrates via an electrophoretic deposition method using hydrothermally prepared titanate nanotubes as precursors. The effects of calcination temperature on the microstructures and photoactivity of as-prepared titanate nanotube films are investigated and discussed. The results indicate that the intercalated sodium ions (Na+) in the as-prepared titanate nanotubes are easily removed during the electrophoretic deposition. The phase transformation of titanate to anatase and diffusion of Na+ ions from glass substrates into films occur at 400 °C. With increasing calcination temperature, the crystallization of anatase enhances and sodium content in the films increases. At 500 °C, the tubular structure still holds and the films show the highest photocatalytic activity probably due to their good crystallization, large specific surface areas and tubular structures.