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首页> 外文期刊>RSC Advances >Highly monodisperse Cu3Mo2O9 micropompons with excellent performance in photocatalysis, photocurrent response and lithium storage
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Highly monodisperse Cu3Mo2O9 micropompons with excellent performance in photocatalysis, photocurrent response and lithium storage

机译：高度单分散CU3MO2O9微量化量，具有优异的光催化，光电流响应和锂储存性能优异

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摘要

We developed a simple and facile method for preparing two types of transition metal molybdates: AMoO(4) (A = Ni and Zn) and B3Mo2O9 (B = Cu and Zn). Initially, a hydrothermal reaction at 383 K for 10 h in an aqueous solution of ammonium molybdate tetrahydrate (AMT) and metal acetates (MAc2, M = Ni, Cu and Zn) was carried out to synthesize their precursors: NiMoO4 center dot xH(2)O, ZnMoO4 center dot 0.8H(2)O, Cu-3(OH)(2)(MoO4)(2) and Zn-3(OH)(2)(MoO4)(2). Subsequently, AMoO(4) with a 1D structure and B3Mo2O9 with a 3D structure were successfully constructed by sintering the precursors at 873 K for 3 h in air. Our result presented the first evidence that the generation of alpha-ZnMoO4 and Zn3Mo2O9 is dependent on the initial concentration of AMT or Zn(Ac)(2). More importantly, a highly monodisperse Cu3Mo2O9 micropompon structure was successfully created by an ethylenediaminetetraacetic acid (H4Y)-mediated hydrothermal route and a subsequent sintering process. We considered that H4Y, a strong competitive chelating ligand, played a significant role in prohibiting the formation of the intermediate (NH4)(2)Cu(MoO4)(2), thereby not only producing a monodisperse structure of Cu-3(OH)(2)(MoO4)(2) but also reducing the size of the structure by forming a stable complex: CuY. Three independent experiments: photocatalysis, photocurrent response and lithium storage were performed to discuss several possible applications of the as-obtained Cu3Mo2O9 micropompons. Our data demonstrated that the Cu3Mo2O9 material exhibited excellent photocatalytic efficiency for the degradation of Congo red under visible light irradiation. Also, the time-dependent photoresponse of the Cu3Mo2O9 gave a very high ratio (about 171) of light current to dark current and a stable photocurrent density, which were a reflection of a high concentration of photogenerated electron-hole pairs. Further, the material indicated good charge-discharge stability and high coulombic efficiency in lithium-ion batteries even during the 100 cycles. We believe that the present study represents a significant step in the development of transition metal molybdates.
机译：我们开发了一种制备两种过渡金属钼酸盐的简单而设为简单的方法：AMOO（4）（A = Ni和Zn）和B3MO2O9（B = Cu和Zn）。最初，在钼酸铵四水合物（AMT）和金属乙酸盐水溶液中为383k的水热反应（MAC2，M = Ni，Cu和Zn），以合成它们的前体：Nimoo4中心点XH（2 ）O，ZnMoo4中心点0.8H（2）O，Cu-3（OH）（2）（Moo4）（2）和Zn-3（OH）（2）（Moo4）（2）。随后，通过在空气中在873k℃下烧结前体，成功构建具有1D结构和具有3D结构的B3MO2O9的AmOO（4）。我们的结果介绍了第一种证据，即α-ZnMoo4和Zn3MO2O9的产生取决于AMT或Zn（AC）（2）的初始浓度。更重要的是，通过乙二胺四乙酸（H4Y）介导的水热途径和随后的烧结过程成功地产生了高度单分散的Cu 3MO2O9微单打结构。我们认为H4Y是一种强大的竞争性螯合配体，在禁止形成中间体（NH4）（2）Cu（Moo4）（2）中发挥了重要作用，从而不得产生Cu-3（OH）的单分散结构（2）（MOO4）（2），但也通过形成稳定的复合物来降低结构的大小：CUY。三个独立实验：进行光催化，光电流响应和锂储存，讨论AS获得的Cu3MO2O9微量化量的几种可能的应用。我们的数据表明，Cu3MO2O9材料表现出优异的光催化效率，用于在可见光照射下刚果红色的降解。而且，Cu3MO2O9的时间依赖性光响应对暗电流的光电流非常高（约171）和稳定的光电流密度，这是高浓度的光生电子孔对的反​​射。此外，即使在100个循环期间，该材料也表示锂离子电池中的良好充电放电稳定性和高库仑效率。我们认为本研究代表了过渡金属钼酸盐的发展的重要一步。

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  • 来源
    《RSC Advances》 |2015年第16期|共10页
  • 作者

    Xia Juan; Song Le Xin; Liu Wei; Teng Yue; Wang Qing Shan; Zhao Li; Ruan Mao Mao;

  • 作者单位

    Univ Sci &

    Technol China Dept Mat Sci &

    Engn CAS Key Lab Mat Energy Convers Hefei 230026 Peoples R China;

    Univ Sci &

    Technol China Dept Mat Sci &

    Engn CAS Key Lab Mat Energy Convers Hefei 230026 Peoples R China;

    Univ Sci &

    Technol China Dept Mat Sci &

    Engn CAS Key Lab Mat Energy Convers Hefei 230026 Peoples R China;

    Univ Sci &

    Technol China Dept Mat Sci &

    Engn CAS Key Lab Mat Energy Convers Hefei 230026 Peoples R China;

    Univ Sci &

    Technol China Dept Chem Hefei 230026 Peoples R China;

    Univ Sci &

    Technol China Dept Chem Hefei 230026 Peoples R China;

    Univ Sci &

    Technol China Dept Chem Hefei 230026 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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