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镧、铁共掺TiO₂光催化剂的合成及其光催化活性研究

Synthesis and Photocatalytic Activity of Lanthanum & Iron Codoped Nano-titania Photocatalyst

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【Author】 WANG Dan-jun1,2,GUO Li1,2,LI Dong-sheng1,2*,FU Feng1,WEI Qing-ting1,GAO Li-feng2(1.Department of Chemistry & Chemical Engineering,The Key Laboratory of Chemical Reaction Engineering of Shanxi,Yan’an University,Yan’an 716000,China; 2.College of Mechanical & Material Engineering,Three Gorges University,Yichang 443002,China)

【机构】延安大学化学与化工学院陕西省化学反应工程重点实验室；三峡大学机械与材料学院；

【摘要】采用溶胶-微波法(Sol-Microwave Method)合成了镧、铁共掺纳米TiO2光催化剂,借助X-射线衍射(XRD)、光电子能谱(XPS)、紫外-可见吸收光谱(UV-vis)等技术对样品组成和光吸收特性进行了表征,同时以高压汞灯(HPML)为实验光源、罗丹明B为模型污染物考察了样品的光催化活性。结果表明,所得TiO2为锐钛矿型,共掺体系的最佳掺杂量为La 0.4%,Fe 0.1%,所获最佳共掺TiO2对罗丹明B表现出较高的光催化活性,高压汞灯下反应45min,降解率达到92.6%。更多还原

【Abstract】 La,Fe-codoped nano-TiO2 photocatalyst was synthesized via microwave-sol process.XRD,XPS and UV-vis absorption spectrum techniques were applied to investigate spectrum properties and chemical composition of as synthesized samples.The samples were indicated to be pure anatase phase nano-TiO2.Photocatalytic experiment results showed that titanium dioxide’s photocatalytic activity increased obviously after La and Fe codoping.When the doping amount of La and Fe was 0.4% and 0.1% respectively,the as-synthesized sample exhibited high photocatalytic activity,and decolor rate of model pollutant Rodamine B was 92.6% after high pressure mucury lamp irradiation for 45 mins.更多还原