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首页> 外文期刊>RSC Advances >Facile synthesis of MoO2/CaSO4 composites as highly efficient adsorbents for congo red and rhodamine B
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Facile synthesis of MoO2/CaSO4 composites as highly efficient adsorbents for congo red and rhodamine B

机译：适用于MOO2 / CASO4复合材料作为刚果红和罗丹明B的高效吸附剂的合成

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摘要

A novel rod-shaped MoO2/CaSO4 composite was prepared by using hexa-ammonium molybdate and flue gas desulfurization gypsum via a simple mixed-solvothermal route. In this composite, CaSO4 matrices are decorated with MoO2 nanoparticles, and non-structural mesopores are formed via particle packing. Moreover, it displays an excellent adsorption capability towards anionic congo red (CR) and cationic rhodamine B (RhB). The adsorption quantities per unit mass and removal efficiencies of the two dyes are significantly influenced by adsorbent dose, solution pH, and temperature. The adsorption isotherm data can be best fitted by the Langmuir model, and the calculated maximum adsorption quantities at 303.5 K are 853.54 mg g(-1) for CR and 86.38 mg g(-1) for RhB, respectively, which are superior to other common adsorbents. The corresponding kinetic data can be well matched with the pseudo-second-order model. Additionally, the CR adsorption is an exothermic process, while the RhB adsorption is an endothermic process. Both of them are multi-step chemisorption processes influenced by surface adsorption and intra-particle diffusion. This MoO2/CaSO4 composite can be applied as an alternative adsorbent for removing organic dyestuffs from printing and dyeing wastewater.
机译：通过使用简单的混合 - 溶剂热途径使用六铵 - 钼酸铵和烟道气脱硫石膏来制备新的棒状MOO2 / CASO4复合材料。在该复合材料中，CasO4基质用Moo2纳米颗粒装饰，并且通过颗粒包装形成非结构性疏孔。此外，它显示出对阴离子刚果红（Cr）和阳离子罗丹明B（RHB）的优异的吸附能力。每单位质量和两种染料的去除效率的吸附量受吸附剂量，溶液pH和温度的显着影响。 Langmuir模型可以最适合装配吸附等温数据，并且分别计算出303.5 k的最大吸附量为853.54mg g（-1），分别为rhb的86.38mg（-1），其优于其他常见的吸附剂。相应的动力学数据可以与伪二阶模型很好地匹配。另外，Cr吸附是一种放热过程，而RHB吸附是吸热过程。它们中的两者都是受表面吸附和颗粒内扩散影响的多步高化学吸附过程。该MOO2 / CASO4复合材料可作为替代吸附剂施用，用于从印刷和染色废水中除去有机染料。

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  • 来源
    《RSC Advances》 |2018年第3期|共11页
  • 作者

    Jia Xin-Jian; Wang Jinshu; Wu Junshu; Teng Weili; Zhao Bingxin; Li Hongyi; Du Yucheng;

  • 作者单位

    Beijing Univ Technol Coll Mat Sci &

    Engn Minist Educ Key Lab Adv Funct Mat Beijing 100124 Peoples R China;

    Beijing Univ Technol Coll Mat Sci &

    Engn Minist Educ Key Lab Adv Funct Mat Beijing 100124 Peoples R China;

    Beijing Univ Technol Coll Mat Sci &

    Engn Minist Educ Key Lab Adv Funct Mat Beijing 100124 Peoples R China;

    Beijing Univ Technol Coll Mat Sci &

    Engn Minist Educ Key Lab Adv Funct Mat Beijing 100124 Peoples R China;

    Beijing Univ Technol Coll Mat Sci &

    Engn Minist Educ Key Lab Adv Funct Mat Beijing 100124 Peoples R China;

    Beijing Univ Technol Coll Mat Sci &

    Engn Minist Educ Key Lab Adv Funct Mat Beijing 100124 Peoples R China;

    Beijing Univ Technol Coll Mat Sci &

    Engn Minist Educ Key Lab Adv Funct Mat Beijing 100124 Peoples R China;

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