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Photocatalytic degradation of methylene blue on Fe3+-doped TiO2 nanoparticles under visible light irradiation
Authors:Bitao Su  Ke Wang  Jie Bai  Hongmei Mu  Yongchun Tong  Shixiong Min  Shixiong She  Ziqiang Lei
Institution:(1) Key Laboratory of Eco-Environment-Related Polymer Materials, Key Laboratory of Gansu Polymer Materials, College of Chemistry and Chemical Engineering, Northwest Normal University, Lanzhou, 730070, China
Abstract:Fe3+-doped TiO2 composite nanoparticles with different doping amounts were successfully synthesized using sol-gel method and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM) and ultravioletvisible spectroscopy (UV-Vis) diffuse reflectance spectra (DRS). The photocatalytic degradation of methylene blue was used as a model reaction to evaluate the photocatalytic activity of Fe3+/TiO2 nanoparticles under visible light irradiation. The influence of doping amount of Fe3+ (ω: 0.00%–3.00%) on photocatalytic activities of TiO2 was investigated. Results show that the size of Fe3+/TiO2 particles decreases with the increase of the amount of Fe3+ and their absorption spectra are broaden and absorption intensities are also increased. Doping Fe3+ can control the conversion of TiO2 from anatase to rutile. The doping amount of Fe3+ remarkably affects the activity of the catalyst, and the optimum efficiency occurs at about the doping amount of 0.3%. The appropriate doping of Fe3+ can markedly increase the catalytic activity of TiO2 under visible light irradiation. __________ Translated from Journal of Northwest Normal University (Natural Science), 2006, 42(6): 55–56 译自: 西北师范大学学报(自然科学版)]
Keywords:Fe3+-doped  TiO2 nanoparticles  nature light  methylene blue  photocatalytic activity
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