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Bi含量对溴氧化铋光催化性能的影响

赵立业 安汝舜 石鑫 陈国博 王亮 李春虎

赵立业, 安汝舜, 石鑫, 陈国博, 王亮, 李春虎. Bi含量对溴氧化铋光催化性能的影响[J]. 燃料化学学报. doi: 10.1016/S1872-5813(21)60144-5
引用本文: 赵立业, 安汝舜, 石鑫, 陈国博, 王亮, 李春虎. Bi含量对溴氧化铋光催化性能的影响[J]. 燃料化学学报. doi: 10.1016/S1872-5813(21)60144-5
ZHAO Li-ye, AN Ru-shun, SHI Xin, CHEN Guo-bo, WANG Liang, LI Chun-hu. The effect of Bi content on the photocatalytic performance of bismuth oxybromides[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(21)60144-5
Citation: ZHAO Li-ye, AN Ru-shun, SHI Xin, CHEN Guo-bo, WANG Liang, LI Chun-hu. The effect of Bi content on the photocatalytic performance of bismuth oxybromides[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(21)60144-5

Bi含量对溴氧化铋光催化性能的影响

doi: 10.1016/S1872-5813(21)60144-5
详细信息
    作者简介:

    赵立业:zhaoliye369@163.com

    通讯作者:

    chenguobo@ouc.edu.cn

    Tel: 0532-66782502,E-mail: wangliang_good@163. com

  • #: 共同第一作者
  • 中图分类号: TQ426.9

The effect of Bi content on the photocatalytic performance of bismuth oxybromides

  • 摘要: 采用水热法和溶剂热法制备BiOBr、Bi3O4Br和Bi4O5Br2三种光催化剂,通过X射线衍射(XRD)、扫描电子显微镜(SEM)、X射线光电子能谱(XPS)与紫外-可见漫反射光谱(UV-vis DRS)表征光催化剂的晶体结构、表面形貌和光学性能,利用密度泛函理论计算光催化剂的能带结构和态密度,在可见光照射下,通过降解RhB考察光催化剂的活性。结果表明:Bi的含量会影响光催化剂的导带位置和禁带宽度,Bi4O5Br2光催化剂降解效果最好,能够在50 min内将RhB完全降解。自由基捕获实验证明,超氧自由基(•O2−)是光催化降解RhB的主要活性物质。
    1)  #: 共同第一作者
  • Figure  1  XRD patterns of BiOBr, Bi3O4Br, and Bi4O5Br2

    Figure  2  XPS spectra of the as-prepared Bi4O5Br2: (a) survey, (b) Bi 4f,(c) O 1s, (d) Br 3d.

    Figure  3  SEM images of (a)BiOBr, (b)Bi3O4Br, and (c)Bi4O5Br2.

    Figure  4  (a) UV–Vis DRS of BiOBr, Bi3O4Br, and Bi4O5Br2 samples and (b) plots of (αhv)1/2 versus energy (hv) for the Eg of BiOBr, Bi3O4Br, and Bi4O5Br2.

    Figure  5  The photoanode Mott-Schottky plots (a) and the derived energy band diagrams vs RHE at pH=0 (b) of the BiOBr, Bi3O4Br, and Bi4O5Br2.

    Figure  6  Transient photocurrent responses (I-t) of BiOBr, Bi3O4Br, and Bi4O5Br2.

    Figure  7  The DFT-simulated band structure and density of states of the BiOBr, Bi3O4Br, and Bi4O5Br2.

    Figure  8  Photocatalytic degradation of RhB solutions under visible light irradiation.

    Figure  9  First-order reaction kinetic fitting data graph.

    Figure  10  Photocatalytic degradation of RhB in the presence of various scavengers: (a) BiOBr, (b) Bi3O4Br, (c) Bi4O5Br2.

    表  1  三种光催化剂的一级反应动力学参数

    Table  1  First-order reaction kinetic parameters of three samples

    SamplesBiOBrBi3O4BrBi4O5Br2
    k(min−10.0100.03670.0642
    R20.9790.9910.982
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-05-14
  • 修回日期:  2021-06-21
  • 网络出版日期:  2021-08-23

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