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首页> 外文期刊>Journal of Hazardous Materials >The contribution of vanadium and titanium on improving methylene blue decolorization through heterogeneous UV-Fenton reaction catalyzed by their co-doped magnetite
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The contribution of vanadium and titanium on improving methylene blue decolorization through heterogeneous UV-Fenton reaction catalyzed by their co-doped magnetite

机译：钒和钛通过共掺杂磁铁矿催化的异质UV-Fenton反应对改善亚甲基蓝脱色的贡献

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摘要

This study investigated the methylene blue (MB) decolorization through heterogeneous UV-Fenton reac tion catalyzed by V-Ti co-doped magnetites, with emphasis on comparing the contribution of V and Ti cations on improving the adsorption and catalytic activity of magnetite. In the well crystallized spinel structure, both Ti~(4+) and V~(3+) occupied the octahedral sites. Ti~(4+) showed a more obvious effect on increasing specific surface area and superficial hydroxyl amount than V~(3+) did, resulting in a significant improvement of the adsorption ability of magnetite to MB. The UV introduction greatly accelerated MB degradation. And magnetite with more Ti and less V displayed better catalytic activity in MB degradation through heterogeneous UV-Fenton reaction. The transformation of degradation products and individual contri bution from vanadium and titanium on improving adsorption and catalytic activity of magnetite were also investigated. These new insights are of high importance for well understanding the interface inter action between contaminants and metal doped magnetites, and the environmental application of natural and synthetic magnetites.
机译：这项研究研究了V-Ti共掺杂磁铁矿通过异质UV-Fenton反应对亚甲基蓝（MB）的脱色，着重于比较V和Ti阳离子对改善磁铁矿的吸附和催化活性的贡献。在结晶良好的尖晶石结构中，Ti〜（4+）和V〜（3+）都占据了八面体位置。与V〜（3+）相比，Ti〜（4+）对增加比表面积和表观羟基量具有更明显的影响，从而导致磁铁矿对MB的吸附能力显着提高。紫外线的引入大大加速了MB的降解。通过异质UV-Fenton反应，具有更多Ti和更少V的磁铁矿在MB降解中显示出更好的催化活性。还研究了钒和钛的降解产物的转化和单个贡献对改善磁铁矿的吸附和催化活性的影响。这些新见解对于很好地理解污染物与金属掺杂磁铁矿之间的界面相互作用以及天然和合成磁铁矿的环境应用具有非常重要的意义。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第15期|p.247-254|共8页
  • 作者

    Xiaoliang Liang; Yuanhong Zhong; Sanyuan Zhu; Lingya Ma; Peng Yuan; Jianxi Zhu; Hongping He; Zheng Jiang;

  • 作者单位

    Key Laboratory of Mineralogy and Metallogeny. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China,Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;

    Key Laboratory of Mineralogy and Metallogeny. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China,Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;

    Key Laboratory of Mineralogy and Metallogeny. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;

    Key Laboratory of Mineralogy and Metallogeny. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China,Graduate University of the Chinese Academy of Sciences, Beijing 100049, China;

    Key Laboratory of Mineralogy and Metallogeny. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;

    Key Laboratory of Mineralogy and Metallogeny. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;

    Key Laboratory of Mineralogy and Metallogeny. Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China;

    SSRF, Shanghai Institute of Applied Physics, Chinese Academy of Sciences. Shanghai 201800, 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    magnetite; isomorphic substitution; XANES; adsorption; photo-fenton;

    机译：磁铁矿;同构取代XANES;吸附光芬顿;

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