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Simple Method Synthesis of Visible Light Active N-Doped TiO2 Photocatalytic Nanoparticle
|Sangwook Lee , In-Sun Cho , TaeWon Noh , Kug Sun Hong|
Seoul National University, Department of Materials Science and Engineering (MSE, SNU), San 56-1, Sillim-dong, Gwanak-gu, Seoul 151-744, Korea, South
A nitrogen-doped titanium oxide nanoparticle was synthesized via simple sol-gel route and N-doped TiO2 film was prepared to investigate the photocatalytic properties of the nanoparticle. In order to obtain N-doped anatase nanoparticle crystalline, NH4OH solution was added dropwise to titanium tetraisopropoxide (TTIP) solution at 80oC and the particulate sol was reacted for 24 hours. The synthesized white powder leads to pale yellowish powder by following heat-treatment process at 450oC in air for an hour. X-ray photoelectron spectrum and UV-vis spectrum were analyzed to confirm that the nitrogen was doped into TiO2 nanoparticle successfully. The visible light-induced photocatalysis and hydrophilicity of the N-doped TiO2 film were enhanced significantly as compared with undoped one. The improved photo activity was attributed to extended absorption range of the TiO2 nanoparticle from ultraviolet to visible wavelength.
Presentation: Poster at E-MRS Fall Meeting 2007, Symposium A, by Sangwook Lee
See On-line Journal of E-MRS Fall Meeting 2007
Submitted: 2007-05-21 20:21 Revised: 2009-06-07 00:44