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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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【作者】 王丹军郭莉李东升付峰韦庆婷高利峰

【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%。

【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.

【基金】 国家自然科学基金项目资助(20773104);教育部新世纪优秀人才支持计划(NCET-06-0891);教育部重点科研基金(208143);陕西省教育厅专项科研基金(07JK43509JK817);陕西省重点实验室重点科研基金(08JZ81)
  • 【分类号】O643.36;O614.411
  • 【被引频次】7
  • 【下载频次】268
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