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首页> 外文期刊>RSC Advances >Fabrication of a magnetite/diazonium functionalized-reduced graphene oxide hybrid as an easily regenerated adsorbent for efficient removal of chlorophenols from aqueous solution
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Fabrication of a magnetite/diazonium functionalized-reduced graphene oxide hybrid as an easily regenerated adsorbent for efficient removal of chlorophenols from aqueous solution

机译：制造磁铁矿/重氮官能化的石墨烯氧化物杂交物，作为易于再生的吸附剂，用于从水溶液中有效地除去氯苯酚

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摘要

A magnetic hybrid nanomaterial, which contains magnetite (Fe3O4) particles and diazonium functionalized-reduced graphene oxide (DF-RGO), was fabricated via a three-pot reaction. First, the reduced graphene oxide (RGO) was synthesized via a redox reaction. Second, diazonium functionalized-RGO was prepared via a feasible chemical reaction. Third, Fe3O4 particles were loaded onto the surface of DF-RGO by covalent bonding, fabricating the M-DF-RGO hybrid. The fabricated hybrid was characterized by SEM, TEM, AFM, XRD, XPS, FT-IR, TGA, Raman spectroscopy, and magnetometry. The resulting M-DF-RGO hybrid possessed unique magnetic properties and was applied to remove 4-chlorophenol (4-CP) and 2,4-dichlorophenol (2,4-DCP) from aqueous solution. The adsorption of 4-CP and 2,4-DCP on the M-DF-RGO hybrid was performed under various conditions, with respect to initial chlorophenol concentration, pH, and contact time. The results suggest that the adsorption of 4-CP and 2,4-DCP onto the M-DF-RGO hybrid is strongly dependent on pH and weakly dependent on contact time. In addition, the adsorption isotherm of 4-CP and 2,4-DCP on the M-DF-RGO hybrid fits the Freundlich model well and the adsorption capacities of 4-CP and 2,4-DCP on M-DF-RGO reached 55.09 and 127.33 mg g(-1), respectively, at pH 6 and 25 degrees C. In this situation, intermolecular interactions including pi-pi interactions and hydrogen bonding are operative. The calculated results of density functional theory further demonstrate that 2,4-DCP molecules could be more easily absorbed than 4-CP molecules by the M-DF-RGO hybrid. Moreover, the M-DF-RGO hybrid could be easily separated by a magnetic separation process, and showed good recyclability of more than five cycles.
机译：通过三罐反应制造含有磁铁矿（Fe3O4）颗粒和重氮官能化的石墨烯氧化物（DF-RGO）的磁性杂化纳米材料。首先，通过氧化还原反应合成还原的石墨烯（RGO）。其次，通过可行的化学反应制备重氮官能化-Rgo。第三，通过共价键合将Fe3O4颗粒加载到DF-Rgo的表面上，制造M-DF-RGO杂交物。通过SEM，TEM，AFM，XRD，XPS，FT-IR，TGA，拉曼光谱和磁力学，其特征在于制造的杂种。得到的M-DF-rgo杂交物具有独特的磁性，并施加从水溶液中除去4-氯苯酚（4-CP）和2,4-二氯苯酚（2,4-DCP）。在各种条件下，在各种条件下进行4-CP和2,4-DCP的吸附，相对于初始氯苯酚浓度，pH和接触时间。结果表明，4-CP和2,4-DCP的吸附在M-DF-RGO杂种上强烈依赖于pH和弱依赖性接触时间。此外，在M-DF-RGO杂交体上的4-CP和2,4-DCP的吸附等温线适合Freundlich模型井，并且达到了4-CP和2,4-DCP的吸附容量在PH 6和25℃下，分别在55.09和127.33mg（-1）。在这种情况下，包括PI-PI相互作用和氢键的分子间相互作用是可操作的。所计算的密度官能理论的结果进一步证明了通过M-DF-RGO杂交体比4-CP分子更容易吸收2,4-DCP分子。此外，M-DF-RGO杂交机可以通过磁分离过程容易地分离，并且显示出超过五个循环的良好可回收性。

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  • 来源
    《RSC Advances》 |2018年第14期|共10页
  • 作者

    Shen Xiaoqin; Chen Xiaolei; Sun Dejun; Wu Tao; Li Yujiang;

  • 作者单位

    Shandong Univ Sch Environm Sci &

    Engn Shandong Prov Res Ctr Water Pollut Control Jinan 250100 Shandong Peoples R China;

    Shandong Univ Educ Minist Key Lab Colloid &

    Interface Sci Jinan 250100 Shandong Peoples R China;

    Shandong Univ Educ Minist Key Lab Colloid &

    Interface Sci Jinan 250100 Shandong Peoples R China;

    Shandong Univ Educ Minist Key Lab Colloid &

    Interface Sci Jinan 250100 Shandong Peoples R China;

    Shandong Univ Sch Environm Sci &

    Engn Shandong Prov Res Ctr Water Pollut Control Jinan 250100 Shandong Peoples R China;

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  • 中图分类 化学;
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