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MoS2 Nanosheets with Widened Interlayer Spacing for High-Efficiency Removal of Mercury in Aquatic Systems

机译：MoS2纳米片具有更宽的层间距，可高效去除水生系统中的汞

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摘要

Molybdenum disulphide (MoS2) has been an attractive target for investigations in the fields of catalysis, sensing, energy storage, electronics, and optoelectronics. However, its potential application in the important area of environmental cleanup has not yet been effectively explored. With an intrinsically sulfur-rich characteristic and unique 2D structure, MoS2 should be capable of mercury capture and removal. However, successful attempts to apply MoS2 to mercury removal are quite rare, presumably because the vast majority of sulfur atoms are located inside the bulk of MoS2 and are therefore inaccessible for mercury ions. Here, the first experimental evidence that MoS2 nanosheets with widened interlayer spacing are capable of mercury capture, with an extremely high mercury uptake capacity closely matching the theoretically predicted value (2506 mg g(-1)) and the largest distribution coefficient value (3.53 x 10(8) mL g(-1)) is provided. Remarkably, a single treatment of industrial wastewater (polyvinyl chloride industry) with this modified MoS2 could efficiently reduce the mercury concentration (126 p.p.b.) below U.S. Environmental Protection Agency limits for drinking water standards. The findings open up the possibility of expanding the applications of transition metal dichalcogenides in environmental remediation.
机译：二硫化钼（MoS2）已成为催化，传感，储能，电子和光电领域研究的有吸引力的目标。但是，尚未有效地探索其在环境净化的重要领域中的潜在应用。具有固有的富硫特性和独特的2D结构，MoS2应该能够捕获和去除汞。但是，将MoS2应用于除汞的成功尝试非常少见，大概是因为绝大多数硫原子位于MoS2的内部，因此汞离子难以接近。在这里，第一个实验证据表明，具有更大的层间间距的MoS2纳米片能够捕获汞，其极高的汞吸收能力与理论预测值（2506 mg g（-1））和最大的分布系数值（3.53 x提供10（8）mL g（-1））。值得注意的是，用这种改性的MoS2一次处理工业废水（聚氯乙烯工业）可以有效地将汞浓度（126 p.p.b.）降低到美国环境保护署饮用水标准的限值以下。这些发现为扩大过渡金属二卤化物在环境修复中的应用开辟了可能性。

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  • 来源
    《Advanced Functional Materials》 |2016年第30期|5542-5549|共8页
  • 作者

    Ai Kelong; Ruan Changping; Shen Mengxia; Lu Lehui;

  • 作者单位

    Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China;

    Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China|Univ Chinese Acad Sci, Beijing 100039, Peoples R China;

    Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China|Univ Chinese Acad Sci, Beijing 100039, Peoples R China;

    Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Peoples R China;

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