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首页> 外文期刊>Applied Surface Science >Facile synthesis of magnetic Fe_3O_4/graphene composites for enhanced U(VI) sorption
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Facile synthesis of magnetic Fe_3O_4/graphene composites for enhanced U(VI) sorption

机译：磁性合成Fe_3O_4 /石墨烯复合物以增强U（VI）吸附

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摘要

A novel magnetic Fe3O4/graphene composite (FGC) was fabricated by a facile one-step reaction route and shown to be effective for sorbing U(VI) from aqueous solution. The structure, properties and application of the prepared FGC composite were well evaluated. The high saturation magnetization (45.6 emu/g) made FGC easier to be separated from the media within several seconds under an external magnetic. Effects of different ambient conditions (i.e., pH and ionic strength, contact time, temperatures) on sorption behaviors of U(VI) on FGC were carried out by batch experiments. According to the calculation of Langmuir model, the maximum sorption capacity of U(VI) on the FGC at pH 5.5 and 298 K was 176.47 mg/g. The sorption was correlated with the effects of pH, contact time, and temperature. X-ray photoelectron spectroscopy analysis revealed that U(VI) was sorbed on FGC via oxygen-containing functional groups. This work demonstrated that FGC could be recycled and used as an effective recyclable sorbent for sorption of U(VI). (C) 2018 Elsevier B.V. All rights reserved.
机译：一种新颖的磁性Fe3O4 /石墨烯复合材料（FGC）是通过一种简便的一步反应路线制备的，并且显示出对从水溶液中吸附U（VI）的有效性。所制备的FGC复合材料的结构，性能和应用得到了很好的评价。高饱和磁化强度（45.6 emu / g）使FGC易于在外部磁场作用下于几秒钟之内从介质中分离出来。通过分批实验进行了不同环境条件（即pH和离子强度，接触时间，温度）对U（VI）在FGC上的吸附行为的影响。根据Langmuir模型的计算，在pH 5.5和298 K时，FGC上U（VI）的最大吸附容量为176.47 mg / g。吸附与pH，接触时间和温度的影响相关。 X射线光电子能谱分析表明，U（VI）通过含氧官能团吸附在FGC上。这项工作表明FGC可以回收利用，并用作有效的可回收吸附剂来吸附U（VI）。 （C）2018 Elsevier B.V.保留所有权利。

著录项

  • 来源
    《Applied Surface Science》 |2018年第30期|691-698|共8页
  • 作者

    Zhao Donglin; Zhu Hongyu; Wu Changnian; Feng Shaojie; Alsaedi Ahmed; Hayat Tasawar; Chen Changlun;

  • 作者单位

    Anhui Jianzhu Univ, Key Lab Funct Mol Design & Interface Proc, Hefei 230601, Anhui, Peoples R China;

    Anhui Jianzhu Univ, Key Lab Funct Mol Design & Interface Proc, Hefei 230601, Anhui, Peoples R China;

    Anhui Jianzhu Univ, Key Lab Funct Mol Design & Interface Proc, Hefei 230601, Anhui, Peoples R China;

    Anhui Jianzhu Univ, Key Lab Funct Mol Design & Interface Proc, Hefei 230601, Anhui, Peoples R China;

    King Abdulaziz Univ, NAAM Res Grp, Jeddah 21589, Saudi Arabia;

    King Abdulaziz Univ, NAAM Res Grp, Jeddah 21589, Saudi Arabia;

    Chinese Acad Sci, Inst Plasma Phys, CAS Key Lab Photovolta & Energy Conservat Mat, POB 1126, Hefei 230031, Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Graphene oxide; Magnetic composites; Sorption; U(VI);

    机译：氧化石墨烯;磁性复合材料;吸附;U（VI）;

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