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首页> 外文期刊>Environmental Science & Technology >Fe_2O_3-Pillared Rectorite as an Efficient and Stable Fenton-Uke Heterogeneous Catalyst for Photodegradation of Organic Contaminants
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Fe_2O_3-Pillared Rectorite as an Efficient and Stable Fenton-Uke Heterogeneous Catalyst for Photodegradation of Organic Contaminants

机译：Fe_2O_3柱状锂蒙脱石作为一种高效稳定的Fenton-Uke多相光催化降解有机污染物的催化剂

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摘要

An efficient Fe_2O_3-pillared rectorite (Fe-R) clay was successfully developed as a heterogeneous catalyst for photo-Fenton degradation of organic contaminants. X-ray diffraction analysis and high-resolution transmission electron microscope analysis clearly showed the existence of the Fe_20_3 nanoparticles in the Fe-R catalyst The catalytic activity of the Fe-R catalyst was evaluated by the discoloration and chemical oxygen demand (COD) removal of an azo-dye rhodamine B (RhB, 100 mg/L) and a typical persistent organic pollutant 4-nitrophenol (4-NP, 50 mg/ L) in the presence of hydrogen peroxide (H_2O_2) under visible light irradiation (λ > 420 nm). It was found that the discoloration rate of the two contaminants was over 99.3%, and the COD removal rate of the two contaminants was over 87.0%. The Fe-R catalyst showed strong adsorbability for the RhB in the aqueous solution. Moreover, the Fe-R catalyst still showed good stability for the degradation of RhB after five recycles. Zeta potential and Fourier transform infrared spectroscopy were used to examine the photoreaction processes. Finally, a possible photocatalytic mechanism was proposed.
机译：成功开发了一种高效的Fe_2O_3柱状累托石（Fe-R）粘土作为非均相催化剂，用于光芬顿降解有机污染物。 X射线衍射分析和高分辨率透射电子显微镜分析清楚地表明，Fe-R催化剂中存在Fe_20_3纳米粒子。通过脱色和化学需氧量（COD）去除来评估Fe-R催化剂的催化活性。可见光（λ> 420）下在过氧化氢（H_2O_2）存在下偶氮染料若丹明B（RhB，100 mg / L）和典型的持久性有机污染物4-硝基苯酚（4-NP，50 mg / L）纳米）。发现两种污染物的变色率超过99.3％，两种污染物的COD去除率超过87.0％。 Fe-R催化剂对水溶液中的RhB具有强吸附性。而且，在五次循环后，Fe-R催化剂对于RhB的降解仍然显示出良好的稳定性。用Zeta电位和傅立叶变换红外光谱法检查光反应过程。最后，提出了一种可能的光催化机理。

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  • 来源
    《Environmental Science & Technology》 |2010年第16期|p.6384-6389|共6页
  • 作者

    GAOKE ZHANG; YUANYUAN GAO; YALEI ZHANG; YADAN GUO;

  • 作者单位

    School of Resources and Environmental Engineering,Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, P. R. China;

    rnSchool of Resources and Environmental Engineering,Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, P. R. China;

    rnState Key Laboratory of Pollution Control and Resource Reuse,College of Environmental Science and Engineering, Tongji University, 1239 Si-ping Road, Shanghai 200092, P. R. China;

    rnSchool of Resources and Environmental Engineering,Wuhan University of Technology, Luoshi Road 122, Wuhan 430070, P. R. China;

  • 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);
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  • 正文语种 eng
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