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首页> 外文期刊>RSC Advances >Novel recyclable BiOBr/Fe3O4/RGO composites with remarkable visible-light photocatalytic activity
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Novel recyclable BiOBr/Fe3O4/RGO composites with remarkable visible-light photocatalytic activity

机译：新型可再循环BioBr / Fe3O4 / Rgo复合材料，具有显着的可见光光催化活动

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摘要

Magnetic BiOBr/Fe3O4/RGO composites with remarkable photocatalytic capability were prepared by a simple hydrothermal method to load 3D flower-like microspherical BiOBr onto the surface of Fe3O4/RGO. Under visible-light irradiation (lambda > 420 nm), the BiOBr/Fe3O4/RGO composite with 56% mass percentage of Fe3O4/RGO shows the optimal removal ability for Rhodamine B, and the total removal efficiency is 96%. The coupling of Fe3O4/RGO and BiOBr elevates the conduction band of BiOBr, which enhances the reduction level of BiOBr/Fe3O4/RGO composites. Ultimately, based on experiments and theoretical calculations, an n-type Schottky contact formed at the heterojunction interface between RGO doped with Fe3O4 and BiOBr is proposed for photoexcited charge transfer. The RGO with great adsorptivity plays a major role in the photocatalysts composed of BiOBr, RGO and Fe3O4. Further, BiOBr/Fe3O4/RGO composites with permanent-magnetism can be recovered and reused easily by external magnetic field and maintain a total removal efficiency of 90% after four cycles.
机译：磁性BIOBR / FE3O4 / RGO复合材料具有显着的光催化能力，通过简单的水热法制备将3D花样的微球谱法加载到Fe3O4 / Rgo的表面上。在可见光照射（Lambda> 420nm）下，BioBR / Fe3O4 / Rgo复合材料，具有56％的Fe3O4 / Rgo的质量百分比显示出罗丹明B的最佳去除能力，总去除效率为96％。 Fe3O4 / Rgo和BioBR的偶联升高了BioBR的导频，这提高了BioBR / Fe3O4 / Rgo复合材料的减少水平。最终，基于实验和理论计算，提出了在掺杂有Fe3O4和BioBR的RGO之间的异质结界面处形成的n型肖特基触点，用于光屏蔽电荷转移。具有良好吸附性的RGO在由BioBR，RGO和Fe3O4组成的光催化剂中起着重要作用。此外，可以通过外部磁场容易地回收和重复使用永磁体的BioBR / Fe3O4 / Rgo复合材料，并在四个循环后保持总去除效率为90％。

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  • 来源
    《RSC Advances》 |2020年第34期|共13页
  • 作者

    Zheng Mingkun; Ma Xinguo; Hu Jisong; Zhang Xinxin; Li Di; Duan Wangyang;

  • 作者单位

    Hubei Univ Technol Sch Sci Wuhan 430068 Peoples R China;

    Hubei Univ Technol Sch Sci Wuhan 430068 Peoples R China;

    Hubei Univ Technol Sch Sci Wuhan 430068 Peoples R China;

    Huazhong Univ Sci &

    Technol Key Lab Mat Chem Energy Convers &

    Storage Hubei Key Lab Mat Chem &

    Serv Failure Minist Educ Sch Chem &

    Chem Engn Wuhan 430074 Peoples R China;

    Xian Univ Architecture &

    Technol Sch Met Engn Xian 710055 Peoples R China;

    Hubei Univ Technol Sch Sci Wuhan 430068 Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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