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首页> 外文期刊>Journal of Hazardous Materials >Photocatalytic degradation of 3,4-dichlorophenylurea in aqueous gold nanoparticles-modified titanium dioxide suspension under simulated solar light
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Photocatalytic degradation of 3,4-dichlorophenylurea in aqueous gold nanoparticles-modified titanium dioxide suspension under simulated solar light

机译：模拟太阳光下金纳米粒子修饰的二氧化钛悬浮液中3,4-二氯苯基脲的光催化降解

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摘要

The TiO_2 modified with nanosized gold particles was prepared by deposition-precipitation at pH 7 and calcination in air at various temperatures up to 973 K. The materials were characterized by transmission electron microscope, X-ray diffraction spectrometry, and atomic absorption spectroscopy. The highest photocatalytic efficiency was obtained at the calcination temperature of 873 K. The decrease in 3,4-dichlorophenylurea concentration follows first order kinetics with a half life of 36.6 ±2.0 min in lOOmgL~(-1) of 0.83 wt% Au/TiO_2. Fifteen degradation products were identified using LC/MS/MS and 1C. Degradation pathway was proposed on the basis of the observed transformation products.
机译：通过在7的pH值下沉积沉淀并在高达973 K的不同温度下在空气中煅烧来制备纳米级金颗粒改性的TiO_2。通过透射电子显微镜，X射线衍射光谱和原子吸收光谱对材料进行表征。在873 K的煅烧温度下可获得最高的光催化效率。3,4-二氯苯基脲浓度的降低遵循一级动力学，在100mgL〜（-1）中0.83 wt％Au / TiO_2的半衰期为36.6±2.0 min。 。使用LC / MS / MS和1C鉴定出15种降解产物。根据观察到的转化产物，提出了降解途径。

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  • 来源
    《Journal of Hazardous Materials》 |2011年第3期|p.930-937|共8页
  • 作者

    S. Chusaksri; J. Lomda; T. Saleepochn; P. Sutthivaiyakit;

  • 作者单位

    Chemistry Department and Center of Excellence for Innovation in Chemistry, Faculty of Science, Kas'etsart University, Bangkok 10900, Thailand;

    Chemistry Department and Center of Excellence for Innovation in Chemistry, Faculty of Science, Kas'etsart University, Bangkok 10900, Thailand;

    Chemistry Department and Center of Excellence for Innovation in Chemistry, Faculty of Science, Kas'etsart University, Bangkok 10900, Thailand;

    Chemistry Department and Center of Excellence for Innovation in Chemistry, Faculty of Science, Kas'etsart University, Bangkok 10900, Thailand;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    3; 4-dichlorophenylurea; photocatalytic degradation; au/to_2; simulated solar light; lc/ms/ms;

    机译：3;4-二氯苯基脲;光催化降解;au / to_2;模拟太阳光;lc / ms / ms;

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