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Visible-light-activated Ce-Si co-doped TiO_2 photocatalyst

机译：可见光活化铈硅共掺杂TiO_2光催化剂

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摘要

To enhance the visible photocatalytic activity and thermal stability of TiO_2, Ce-Si co-doped TiO_2 materials were synthesized through a nonaqueous method of which the purpose was to reduce the aggregation between TiO_2 particles. The obtained materials maintained anatase phase and large surface area of 103.3 m~2 g~(-1) even after calcined at 800 ℃. The XPS results also indicated that Si was weaved into the lattice of TiO_2, and Ce mainly existed as oxides on the surface of TiO_2 particles. The doped Si might enhance surface area and suppress transformation from anatase to rutile, while the doped Ce might cause visible absorption and inhibit crystallite growth during heat treatment. Evaluated by decomposing dye Rhodamine B, visible photocatalytic activity of Ce-Si co-doped TiO_2 was obviously higher than that of pure TiO_2 and reached the maximum at Ce and Si contents of 0.5 mol% and 10 mol%.
机译：为了提高TiO_2的可见光催化活性和热稳定性，采用非水法合成了Ce-Si共掺杂TiO_2材料，其目的是减少TiO_2之间的聚集。所得材料即使在800℃煅烧后仍保持锐钛矿相和103.3 m〜2 g〜（-1）的大表面积。 XPS结果还表明，Si被编织到TiO_2的晶格中，Ce主要作为氧化物存在于TiO_2的表面。掺杂的硅可能会增加表面积并抑制从锐钛矿到金红石的转变，而掺杂的铈可能会导致可见光吸收并抑制热处理过程中的晶体生长。通过分解染料若丹明B评估，Ce-Si共掺杂TiO_2的可见光催化活性明显高于纯TiO_2，并在Ce和Si含量分别为0.5mol％和10mol％时达到最大值。

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  • 来源
    《Applied Surface Science》 |2009年第18期|7918-7924|共7页
  • 作者

    Qifeng Chen; Dong Jiang; Weimei Shi; Dong Wu; Yao Xu;

  • 作者单位

    State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;

    Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;

    State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;

    State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;

    State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    titanium dioxide; Ce-Si co-doping; visible light; photocatalysis;

    机译：二氧化钛;铈硅共掺杂;可见光;光催化;

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