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首页> 外文期刊>Advanced Functional Materials >Remarkable Acid Stability of Polypyrrole-MoS_4: A Highly Selective and Efficient Scavenger of Heavy Metals Over a Wide pH Range
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Remarkable Acid Stability of Polypyrrole-MoS_4: A Highly Selective and Efficient Scavenger of Heavy Metals Over a Wide pH Range

机译：聚吡咯-MoS_4的显着酸稳定性：在宽pH范围内对重金属的高选择性和高效清除剂

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摘要

The new material polypyrrole/MoS42-(MoS4-Ppy), prepared by ion-exchange of NO3- of NO3-Ppy with MoS42-, displays high acid stability and excellent uptake for heavy metal ions such as Hg2+, Ag+, Cu2+, and Pb2+. The different maximum adsorption capacities (q(m)) for Cu2+, Pb2+, Hg2+, and Ag+ depend on the various binding modes arising from the different thiophilicity of these metal ions. The removals of Ag+ and Pb2+ reach 99.6% within 5 min, and for highly toxic Hg2+, 98% removal achieves at 1 min. At strong acid limit, the exceptional q(m)(Ag+) of 725 mg g(-1) places the MoS4-Ppy at the top of materials for such removal. Uptake kinetics of Ag+, Hg2+, and Pb2+ is extremely fast: 99.9% removal rates at wide pH range (0.5-6) within 1-5 min. Also, at strongly acidic conditions (pH approximate to 1), for highly toxic Hg2+, 2 ppb concentration can be achieved, accepted as safe limit. The MoS4-Ppy demonstrates an outstanding ability to separate low-concentrated Ag+ from high concentrated Cu2+ especially under strong acidic conditions (pH approximate to 1), showing a large separation factor SFAg/Cu (K-d(Ag)/K-d(Cu)) of 10(5) (100). MoS4-Ppy is a superior and novel sorbent material for water remediation applications as well as precious metals recovery.
机译：通过将NO3-Ppy中的NO3-与MoS42-进行离子交换制得的新型材料聚吡咯/ MoS42-（MoS4-Ppy）具有很高的酸稳定性，并且对重金属离子（如Hg2 +，Ag +，Cu2 +和Pb2 +）具有出色的吸收能力。 。 Cu2 +，Pb2 +，Hg2 +和Ag +的最大吸附容量（q（m））不同，取决于这些金属离子的不同亲硫性而产生的各种结合模式。 Ag +和Pb2 +的去除率在5分钟内达到> 99.6％，对于剧毒的Hg2 +，在1分钟的去除率达到98％以上。在强酸极限下，725 mg g（-1）的出色q（m）（Ag +）将MoS4-Ppy置于去除此类物质的顶部。 Ag +，Hg2 +和Pb2 +的吸收动力学非常快：在1-5分钟内在宽pH范围（0.5-6）下去除率> 99.9％。同样，在强酸性条件下（pH约1），对于剧毒的Hg2 +，可以达到<2 ppb的浓度，这被认为是安全极限。 MoS4-Ppy具有出色的分离低浓度Ag +和高浓度Cu2 +的能力，特别是在强酸性条件下（pH值接近1），显示出较大的分离因子SFAg / Cu（Kd（Ag）/ Kd（Cu））为10（5）（> 100）。 MoS4-Ppy是一种优异的新型吸附剂材料，可用于水修复应用以及贵金属回收。

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  • 来源
    《Advanced Functional Materials》 |2018年第20期|1800502.1-1800502.12|共12页
  • 作者

    Xie Linxia; Yu Zihuan; Islam Saiful M.; Shi Keren; Cheng Yahan; Yuan Mengwei; Zhao Jing; Sun Genban; Li Huifeng; Ma Shulan; Kanatzidis Mercouri G.;

  • 作者单位

    Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China;

    Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China;

    Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA;

    Ningxia Univ, State Key Lab High Efficiency Utilizat Coal & Gre, Yinchuan 750021, Peoples R China;

    Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China;

    Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China;

    Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA;

    Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China;

    Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China;

    Beijing Normal Univ, Coll Chem, Beijing Key Lab Energy Convers & Storage Mat, Beijing 100875, Peoples R China;

    Northwestern Univ, Dept Chem, 2145 Sheridan Rd, Evanston, IL 60208 USA;

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  • 正文语种 eng
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  • 关键词

    acid stability; heavy metal removal; polypyrrole-MoS4 materials; scavengers;

    机译：酸稳定性;重金属去除;聚吡咯-MoS4材料;清除剂;

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