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S−BiOI/BiOBr吸附型光催化剂的制备及其对2,4−二氯苯氧乙酸的去除性能

姚丹 阳艺 郑安妮 王绍兵 余关龙

姚丹, 阳艺, 郑安妮, 等. S−BiOI/BiOBr吸附型光催化剂的制备及其对2,4−二氯苯氧乙酸的去除性能[J]. 复合材料学报, 2024, 42(0): 1-12.
引用本文: 姚丹, 阳艺, 郑安妮, 等. S−BiOI/BiOBr吸附型光催化剂的制备及其对2,4−二氯苯氧乙酸的去除性能[J]. 复合材料学报, 2024, 42(0): 1-12.
YAO Dan, YANG Yi, ZHENG Anni, et al. Preparation of S−BiOI/BiOBr adsorption photocatalyst and its removal properties for 2,4−dichlorophenoxyacetic acid[J]. Acta Materiae Compositae Sinica.
Citation: YAO Dan, YANG Yi, ZHENG Anni, et al. Preparation of S−BiOI/BiOBr adsorption photocatalyst and its removal properties for 2,4−dichlorophenoxyacetic acid[J]. Acta Materiae Compositae Sinica.

S−BiOI/BiOBr吸附型光催化剂的制备及其对2,4−二氯苯氧乙酸的去除性能

基金项目: 湖南省水利科技项目 (XSKJ2022068-03,XSKJ2023059-37);湖南省生态环境厅科研项目 (HBKT-2021012)
详细信息
    通讯作者:

    余关龙,博士,副教授,硕士生导师,研究方向为光催化材料及污水处理 E-mail:ygl079@csust.edu.cn

  • 中图分类号: O643.36;O644.1;TB332

Preparation of S−BiOI/BiOBr adsorption photocatalyst and its removal properties for 2,4−dichlorophenoxyacetic acid

Funds: Water technology project of Hunan Province (XSKJ2022068-03, XSKJ2023059-37); Department of Ecology and Environment research project of Hunan Province (HBKT-2021012)
  • 摘要: 水体的农药污染对人体健康构成潜在威胁。采用一步溶剂热法合成了一种新型S0.1−(3/7)BiOI/BiOBr(S0.1BBI0.3)光催化剂。通过XRD、SEM、XPS、UV−Vis DRS、EIS等手段表征其结构、形貌和光学性能等理化性质。S0.1BBI0.3呈二维纳米片堆积而成的花状微球结构,Z型异质结和S掺杂双策略共修饰拓宽了BiOBr的光响应范围,有效防止光生电子−空穴对在S0.1BBI0.3内部复合,提高光生载流子的氧化还原能力,同时能够提高比表面积,提供更丰富的介孔结构,显著提升吸附性能,并为光催化反应提供了更多的活性位点。光催化实验结果表明,合成的S0.1BBI0.3在可见光下对2,4−二氯苯氧乙酸(2,4−D)具有最佳的吸附和光催化性能,在45 min黑暗和120 min光照条件下,2,4−D去除率最高可达91.8%。ESR技术证实·O2是S0.1BBI0.3的光催化活性物质。

     

  • 图  1  Sz–(x/y)BiOI/BiOBr(SzBBIx)的制备流程图

    Figure  1.  Flow chart of preparation of Sz–(x/y)BiOI/BiOBr (SzBBIx)

    图  2  BiOBr、BiOI和S0.1BBI0.3的XRD图谱(a)和FT−IR图谱(b)

    Figure  2.  XRD patterns (a) and FT−IR patterns (b) of BiOBr, BiOI and S0.1BBI0.3

    图  3  BiOBr(a)、BiOI(b)和S0.1BBI0.3(c)的SEM图像

    Figure  3.  SEM image of BiOBr, BiOI and S0.1BBI0.3

    图  4  S0.1BBI0.3的EDS图像

    Figure  4.  EDS diagram of S0.1BBI0.3

    图  5  BiOBr、BiOI和S0.1BBI0.3的N2吸附−脱附等温线和BJH孔径分布曲线(插图)

    Figure  5.  N2 adsorption−desorption isotherm curves and pore size distribution by BJH method (inset part) of BiOBr, BiOI and S0.1BBI0.3

    图  6  BiOBr、BiOI和S0.1BBI0.3样品的XPS图谱:(a) 全谱;(b) Br 3d;(c) I 3d;(d) O 1s;(e) Bi 4f

    Figure  6.  XPS spectra of BiOBr, BiOI and S0.1BBI0.3 samples: (a) survey, (b) Br 3d, (c) I 3d, (d) O 1s and (e) Bi 4f

    图  7  BiOBr、BiOI、BBI0.3、S0.1BiOBr和S0.1BBI0.3的UV−Vis DRS图(a)和Eg图(b)

    Figure  7.  UV−Vis diffuse reflectance spectrum (a) and band gap diagram (b) of BiOBr, BiOI, BBI0.3, S0.1BiOBr and S0.1BBI0.3

    图  8  BiOBr、BiOI、BBI0.3、S0.1BiOBr和S0.1BBI0.3的EIS图谱(a)和光电流图谱(b)

    Figure  8.  EIS Nyquist plots (a) and photocurrent curve (b) of BiOBr, BiOI, BBI0.3, S0.1BiOBr and S0.1BBI0.3

    图  9  BiOBr、BiOI、BBI0.3、S0.1BBIx和SzBBI0.3去除2,4−D曲线((a)、(b))、准一级动力学拟合((c)、(d))、不同S0.1BBI0.3投加量和去除不同浓度2,4−D曲线((e)、(f))

    Figure  9.  Removal curves of 2,4−D by BiOBr, BiOI, BBI0.3, S0.1BBIx and SzBBI0.3 ((a), (b)), quasi−first−order kinetic fitting ((c), (d)), and Curves of different dosages of S0.1BBI0.3 and removal of different concentrations of 2,4−D ((e)、(f))

    Notes: C/C0: The ratio of the residual concentration of 2,4−D to its initial concentration

    图  10  S0.1BBI0.3的ESR光谱:(a) DMPO−·O2;(b) TEMPO−h+;(c) DMPO−·OH

    Figure  10.  ESR spectra of S0.1BBI0.3: (a) DMPO−·O2, (b) TEMPO−h+ and (c) DMPO−·OH

    图  11  BiOBr、BiOI、BBI0.3、S0.1BiOBr和S0.1BBI0.3的VB−XPS光谱

    Figure  11.  VB−XPS spectra of BiOBr, BiOI, BBI0.3, S0.1BiOBr and S0.1BBI0.3

    图  12  S0.1BBI0.3光催化机制示意图

    Figure  12.  Schematic diagram of the photocatalytic mechanism of S0.1BBI0.3

    表  1  S0.1BiOBr、S0.1BiOI和S0.1BBI0.3的EDS数据

    Table  1.   EDS data for S0.1BiOBr, S0.1BiOI and S0.1BBI0.3

    Sample Relative content of element /wt%
    O Bi Br I S
    S0.1BiOBr 7.10 68.87 23.71 - 0.33
    S0.1BiOI 8.08 68.39 - 23.53 -
    S0.1BBI0.3 11.06 68.09 17.90 2.91 0.03
    下载: 导出CSV

    表  2  BiOBr、BiOI和S0.1BBI0.3的BET数据

    Table  2.   BET data for BiOBr, BiOI and S0.1BBI0.3

    Sample SBET/
    (m2·g−1)
    Vp/
    (cm3·g−1)
    Pore Size/
    nm
    BiOBr 18.68 0.108 19.60
    BiOI 17.99 0.115 19.87
    S0.1BBI0.3 26.09 0.123 15.83
    Notes: SBET: Specific surface are; Vp: Total pore volume
    下载: 导出CSV
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出版历程
  • 收稿日期:  2023-12-19
  • 修回日期:  2024-01-24
  • 录用日期:  2024-01-28
  • 网络出版日期:  2024-03-08

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