[Molybdenum]:Effects of doping modes on photocatalytic activities of Mo/TiO_2 films

TiO_2 thin films doped with Mo were synthesized under various modes and concentrations. The effects of Mo doping on TiO_2 films were characterized by XRD, UV-VIS transmittance spectra and electrochemical impedance spectroscopy. The results show that TiO_2 catalysts doped with Mo~(6+) extend absorption edge and charge transfer resistance of interfacial decrease. The degradation of methyl orange shows that the best doping mode of Mo~(6+) is doped on a bottom layer and the photocatalytic activity is lower .....Details,please contact the auther, editor directly.

通过溶胶凝胶法制备了以不同方式和不同浓度掺Mo的TiO2薄膜。通过X射线衍射(XRD)、UV VIS透射光谱、电化学阻抗谱分析了Mo对TiO2薄膜晶粒结构、光吸收性能、阻抗的影响。甲基橙光催化降解实验表明,钼的最佳掺杂方式为在薄膜底层掺杂,在表层及体相掺杂的效果均比未掺杂的TiO2差;其中以Mo的摩尔分数为1.0%、在薄膜底层掺杂时TiO2薄膜的光催化活性最佳。并从载流子分离效率方面讨论了掺杂方式及掺杂浓度对光催化活性的影响。

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