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首页> 外文期刊>Applied Physics >Silver bromide in montmorillonite as visible light-driven photocatalyst and the role of montmorillonite
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Silver bromide in montmorillonite as visible light-driven photocatalyst and the role of montmorillonite

机译：溴化银在蒙脱石中作为可见光驱动的光催化剂和蒙脱石的作用

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摘要

In this study, novel plasmonic photocatalyst, Ag/AgBr-montmorillonite (MMT) nanocomposite, was prepared by dispersion method and light irradiation. The structure, composition and optical properties of such material was investigated by transmission electron microscopy, UV-visible diffuse reflectance spectroscopy, X-ray diffraction and Fourier transform infrared spectroscopy. The powder X-ray diffraction showed intercalation of Ag/AgBr nanoparticles into the clay interlayer space. The results showed that the prepared sample has a similar phase composition. However, their photocatalytic activity varied significantly. The photocatalytic testing result showed that the Ag/AgBr-MMT nanocomposite was more efficient photocatalyst in the discoloration of methylene blue under visible light illumination. The Ag/AgBr-MMT nanocomposite in pH = 2 and under visible light degraded 92 % of dye at the irradiation time of 20 min. MMT as matrix showed excellent role in separation efficiency of electron-hole pairs. The mechanism of separation of the photogen-erated electrons and holes at the Ag/AgBr-MMT nanocomposite was discussed.
机译：本研究通过分散法和光辐照制备了新型等离激元光催化剂Ag / AgBr-蒙脱土（MMT）纳米复合材料。通过透射电子显微镜，紫外可见漫反射光谱，X射线衍射和傅里叶变换红外光谱研究了这种材料的结构，组成和光学性质。粉末X射线衍射显示出Ag / AgBr纳米颗粒插入到粘土夹层空间中。结果表明，制备的样品具有相似的相组成。但是，它们的光催化活性差异很大。光催化测试结果表明，在可见光照射下，Ag / AgBr-MMT纳米复合材料在亚甲基蓝变色中是更有效的光催化剂。 pH = 2且在可见光下的Ag / AgBr-MMT纳米复合材料在20分钟的照射时间降解了92％的染料。以MMT为基质在电子-空穴对的分离效率中显示出优异的作用。讨论了Ag / AgBr-MMT纳米复合材料中光生电子和空穴的分离机理。

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  • 来源
    《Applied Physics》 |2016年第9期|822.1-822.9|共9页
  • 作者

    Sh. Sohrabnezhad; A. Pourahmad; M. Razavi;

  • 作者单位

    Department of Chemistry, Faculty of Science, University of Guilan, P.O. Box 1914, Rasht, Iran;

    Department of Chemistry, Rasht Branch, Islamic Azad University, Rasht, Iran;

    Department of Chemistry, Faculty of Science, University of Guilan, P.O. Box 1914, Rasht, Iran;

  • 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);
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  • 正文语种 eng
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