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首页> 外文期刊>Environmental Science & Technology >Hg~0 Capture over CoMoS/γ-Al_2O_3 with MoS_2 Nanosheets at Low Temperatures
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Hg~0 Capture over CoMoS/γ-Al_2O_3 with MoS_2 Nanosheets at Low Temperatures

机译：MoS_2纳米片在低温下在CoMoS /γ-Al_2O_3上捕获Hg〜0

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摘要

CoMoS/γ-Al_2O_3 sorbent was prepared via incipient wetness impregnation (IWI) and sulfur-chemical vapor reaction (S-CVR) methods and tested in terms of its potential for Hg~0 capture. It was observed that the CoMoO/γ- Al_2O_3 showed a Hg~0 capture effidency around 75% at a temperature between 17S and 325 ℃ while CoMoS/γ-Al_2O_3 achieved almost 100% Hg~0 removal efficiency at SO ℃. The high removal efficiency for CoMoS/γ-Al_O_3 remained unchanged for 2000 min in the test. Its theoretical capacity for Hg~0 capture was found to be 18.9S mg/g based on the Elovich model. The ability of this material for Hg~0 capture is atributed to the MoS_2 nanosheets coated on surface of the maro- and meso-pores of γ-Al_2O_3. These MoS_2 are two-dimensional transition-metal dichalcogenide (2D TMDC) assembled with unsulfided cobalt atoms at the edges. It is believed that these MoS_2 nanosheets provided dense active sites for Hg~0 capture. The removal of Hg~0 at low temperatures was achieved via the combination of Hg~0 with the chalcogen (S) atoms on the entire basal plane of the MoS_2 nanosheets with coordinative unsaturated sites (CUS) to form a stable compound, HgS.
机译：CoMoS /γ-Al_2O_3吸附剂是通过初期湿润浸渍法（IWI）和硫化学气相反应（S-CVR）方法制备的，并对其吸附Hg〜0的潜力进行了测试。观察到在17S和325℃之间，CoMoO /γ-Al_2O_3的Hg〜0捕获效率约为75％，而在SO℃，CoMoS /γ-Al_2O_3的Hg〜0去除效率几乎为100％。在测试中，对于CoMoS /γ-Al_O_3的高去除效率在2000分钟内保持不变。根据Elovich模型，其理论捕获Hg〜0的能力为18.9S mg / g。该材料捕获Hg-0的能力归因于涂在γ-Al_2O_3的孔和中孔表面的MoS_2纳米片。这些MoS_2是二维过渡金属二卤化二硫化锡（2D TMDC），其边缘处结合有未硫化的钴原子。相信这些MoS_2纳米片为Hg-0捕获提供了密集的活性位点。通过在具有配位不饱和位点（CUS）的MoS_2纳米片的整个基面上，将Hg〜0与硫族元素（S）原子结合，可以形成稳定的化合物HgS，从而在低温下去除Hg〜0。

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  • 来源
    《Environmental Science & Technology》 |2016年第2期|1056-1064|共9页
  • 作者

    Haitao Zhao; Gang Yang; Xiang Gao; Cheng Heng Pang; Samuel W. Kingman; Tao Wu;

  • 作者单位

    Municipal Key Laboratory of Clean Energy Conversion Technologies, The University of Nottingham Ningbo China, Ningbo 31S100, P. R. China;

    Municipal Key Laboratory of Clean Energy Conversion Technologies, The University of Nottingham Ningbo China, Ningbo 31S100, P. R. China;

    College of Energy Engineering, Zhejiang University, Hangzhou 310027, P. R. China;

    Municipal Key Laboratory of Clean Energy Conversion Technologies, The University of Nottingham Ningbo China, Ningbo 31S100, P. R. China;

    Department of Chemical and Environmental Engineering, The University of Nottingham, Nottingham NG7 2RD, The U.K.;

    Municipal Key Laboratory of Clean Energy Conversion Technologies, The University of Nottingham Ningbo China, Ningbo 31S100, P. R. China, 199 Taikang East Road, Ningbo 315100, 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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