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首页> 外文期刊>RSC Advances >Nanocomposites of graphene oxide, Ag nanoparticles, and magnetic ferrite nanoparticles for elemental mercury (Hg-0) removal
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Nanocomposites of graphene oxide, Ag nanoparticles, and magnetic ferrite nanoparticles for elemental mercury (Hg-0) removal

机译：石墨烯，Ag纳米粒子和磁性铁氧体纳米粒子的纳米复合材料用于元素汞（HG-0）去除

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摘要

Mercury emission from combustion flue gas causes considerable environmental challenges and serious adverse health threats, and elemental mercury (Hg-0) is the most challenging chemical form for removal. In this work, four types of graphene oxide (GO) based composite adsorbents were successfully synthesized by depositing Ag nanoparticles (NPs) and/or magnetic ferrite NPs on GO sheets (denoted as GO, GO-Ag, MGO and MGO-Ag), characterized and applied for the removal of Hg-0 for the first time. The presence of Ag NPs on GO greatly enhances the Hg-0 removal capability of GO-Ag and MGO-Ag as compared to that of pure GO, which is mainly attributed to the amalgamation of Hg-0 on Ag NPs. MGO-Ag shows the best Hg-0 removal performance and thermal tolerance among the four types of adsorbents developed, which can effectively capture Hg-0 up to 150-200 degrees C in a simulated flue gas environment and can be also effectively recycled and reused. Our results indicate that the graphene oxide based composites (i.e. MGO-Ag) have significant potential applications for mercury emission control in coal-fired power plants.
机译：燃烧烟气的汞排放导致相当大的环境挑战和严重的不良健康威胁，元素汞（HG-0）是最具挑战性的化学形式，用于去除。在这项工作中，通过在去纸上沉积Ag纳米颗粒（NPS）和/或磁性铁氧体NP来成功地合成四种类型的石墨烯氧化物（GO）的复合吸附剂（表示为GO，GO-AG，MgO和MgO-AG），其特征和应用于首次去除HG-0。与纯GO相比，AG NPS的存在大大提高了Go-Ag和MgO-AG的HG-0去除能力，这主要归因于AG NPS上的HG-0的融合。 MgO-AG显示出于开发的四种类型的吸附剂中的最佳HG-0去除性能和热耐受，这可以在模拟烟道气体环境中有效地捕获HG-0至150-200摄氏度，并且也可以有效地回收和重复使用。我们的结果表明，石墨烯基复合材料（即MgO-Ag）对燃煤发电厂中的汞排放控制具有显着的潜在应用。

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  • 来源
    《RSC Advances》 |2015年第20期|共7页
  • 作者

    Liu Yuxi; Tian Chong; Yan Bin; Lu Qingye; Xie Yijun; Chen Jian; Gupta Rajender; Xu Zhenghe; Kuznicki Steven M.; Liua Qingxia; Zeng Hongbo;

  • 作者单位

    Univ Alberta Dept Chem &

    Mat Engn Edmonton AB T6G 2V4 Canada;

    Univ Alberta Dept Chem &

    Mat Engn Edmonton AB T6G 2V4 Canada;

    Univ Alberta Dept Chem &

    Mat Engn Edmonton AB T6G 2V4 Canada;

    Univ Alberta Dept Chem &

    Mat Engn Edmonton AB T6G 2V4 Canada;

    Univ Alberta Dept Chem &

    Mat Engn Edmonton AB T6G 2V4 Canada;

    CNR Natl Inst Nanotechnol Edmonton AB T6G 2M9 Canada;

    Univ Alberta Dept Chem &

    Mat Engn Edmonton AB T6G 2V4 Canada;

    Univ Alberta Dept Chem &

    Mat Engn Edmonton AB T6G 2V4 Canada;

    Univ Alberta Dept Chem &

    Mat Engn Edmonton AB T6G 2V4 Canada;

    Univ Alberta Dept Chem &

    Mat Engn Edmonton AB T6G 2V4 Canada;

    Univ Alberta Dept Chem &

    Mat Engn Edmonton AB T6G 2V4 Canada;

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  • 正文语种 eng
  • 中图分类 化学;
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