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Properties of carbon and iron modified TiO_2 photocatalyst synthesized at low temperature and photodegradation of acid orange 7 under visible light

机译：碳铁修饰的TiO_2光催化剂的低温合成及可见光下酸性橙7的光降解性能

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摘要

The nanoparticles of TiO_2 modified with carbon and iron were synthesized by sol-gel followed solvothermal method at low temperature. Its chemical composition and optical absorption were investigated by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), photoluminescence emission spectroscopy (PL), UV-vis absorption spectroscopy, and electron paramagnetic resonance (EPR). It was found that carbon and iron modification causes the absorption edge of TiO_2 to shift the visible light region. Fe(III) cation could be doped into the matrix of TiO_2, by which could hinder the recombination rate of excited electrons/holes. Superior photocatalytic activity of TiO_2 modified with carbon and iron was observed for the decomposition of acid orange 7 (AO7) under visible light irradiation. The synergistic effects of carbon and iron in modified TiO_2 nanoparticles were responsible for improving visible light photocatalytic activity.
机译：通过溶胶-凝胶法和溶剂热法在低温下合成了碳和铁改性的TiO_2纳米粒子。通过X射线衍射（XRD），X射线光电子能谱（XPS），光致发光发射光谱（PL），紫外可见吸收光谱和电子顺磁共振（EPR）研究了其化学成分和光吸收。发现碳和铁的改性导致TiO_2的吸收边缘移动可见光区域。 Fe（III）阳离子可能被掺杂到TiO_2的基体中，从而阻碍了激发电子/空穴的复合速率。在可见光照射下，观察到碳和铁改性的TiO_2具有优异的光催化活性，可分解酸性橙7（AO7）。碳和铁在改性TiO_2纳米粒子中的协同作用有助于改善可见光的光催化活性。

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  • 来源
    《Applied Surface Science》 |2010年第13期|p.4260-4268|共9页
  • 作者

    Yongmei Wu; Jinlong Zhang; Ling Xiao; Feng Chen;

  • 作者单位

    Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, PR China;

    Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, PR China School of Chemistry and Materials Science, Guizhou Normal University, Cuiyang 550001, PR China;

    Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, PR China;

    Key Laboratory for Advanced Materials and Institute of Fine Chemicals, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, PR China;

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  • 正文语种 eng
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  • 关键词

    TiO_2; modification; visible light; photocatalyst; acid orange 7;

    机译：TiO_2;修改;可见光;光催化剂酸性橙7;

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