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蒙脱土-BiVO4/BiOIO3复合材料的制备及其光催化性能

宋雪丽 王涛 漆于辉 常玥 查飞

宋雪丽, 王涛, 漆于辉, 等. 蒙脱土-BiVO4/BiOIO3复合材料的制备及其光催化性能[J]. 复合材料学报, 2024, 42(0): 1-10.
引用本文: 宋雪丽, 王涛, 漆于辉, 等. 蒙脱土-BiVO4/BiOIO3复合材料的制备及其光催化性能[J]. 复合材料学报, 2024, 42(0): 1-10.
SONG Xueli, WANG Tao, QI Yuhui, et al. Preparation and photocatalytic performance of montmorillonite-BiVO4/BiOIO3 composite[J]. Acta Materiae Compositae Sinica.
Citation: SONG Xueli, WANG Tao, QI Yuhui, et al. Preparation and photocatalytic performance of montmorillonite-BiVO4/BiOIO3 composite[J]. Acta Materiae Compositae Sinica.

蒙脱土-BiVO4/BiOIO3复合材料的制备及其光催化性能

基金项目: 国家自然科学基金 (21865031)
详细信息
    通讯作者:

    常玥,博士,教授,硕士生导师,研究方向为功能材料的制备及应用 E-mail: cy70@sina.com

  • 中图分类号: O611.3;TB333

Preparation and photocatalytic performance of montmorillonite-BiVO4/BiOIO3 composite

Funds: National Natural Science Foundation of China (21865031)
  • 摘要: 本文以十六烷基三甲基溴化铵改性蒙脱土、BiVO4及BiOIO3前驱体为原料,水热法制备了改性蒙脱土负载BiVO4/BiOIO3的复合材料(MMT- BiVO4/BiOIO3)。相比BiOIO3,UV-vis DRS显示复合材料的吸收边缘红移至可见光区,200~800 nm区域的吸光强度增强;40%MMT-65% BiVO4/BiOIO3位于579 nm附近的荧光强度低于BiVO4、BiOIO3的,其电化学阻抗圆弧半径最小,表明构建的II型BiVO4/BiOIO3异质结降低了光生载流子的复合率。同时,阳离子表面活性剂修饰的蒙脱土可静电吸引光生电子,载流子的分离率进一步提高,有利于光催化反应。模拟可见光降解酸性品红(AF)的实验中,光照60 min,40%MMT-65% BiVO4/BiOIO3对AF的降解率为97.7%,拟一级动力学反应速率常数为0.0532 min−1,h+、${\text{•}}\text{O}_{2}^{-} $光降解反应的活性基团。此外,复合材料对结晶紫(CV)、亚甲基蓝(MB)、孔雀石绿(MG)等阳离子染料的吸附性能极佳,光降解甲基橙(MO)、罗丹明B(RhB)、盐酸四环素(TC)效果较好。

     

  • 图  1  MMT(CTAB)、BiVO4、BiOIO3、65% BiVO4/BiOIO3和 40% MMT-65%BV/BO的XRD谱

    Figure  1.  图 Fig. 1 XRD patterns of MMT(CTAB), BiVO4, BiOIO3, 65% BiVO4/BiOIO3 and 40% MMT-65%BV/BO

    MMT—Montmorillonite; CTAB—Hexadecyltrimethyl ammonium bromide

    图  2  BiVO4 (a)、BiOIO3 (b)、65% BiVO4/BiOIO3 (c)和40% MMT-65%BV/BO (d)的扫描电镜图片;40% MMT- 65%BV/BO (e, f, g, h)的透射电镜图片

    Figure  2.  SEM patterns of BiVO4 (a), BiOIO3 (b), 65% BiVO4/BiOIO3 (c) and 40% MMT-65%BV/BO (d). TEM patterns of 40% MMT-65%BV/BO (e, f, g, h)

    图  3  不同BiVO4/BiOIO3材料的N2吸附-脱附等温线

    Figure  3.  N2 adsorption-desorption isotherms of different BiVO4/BiOIO3 materials

    图  4  不同BiVO4/BiOIO3样品的紫外-可见漫反射光谱(a)及对应的禁带宽度(b)

    Figure  4.  UV-Vis diffuse reflectance spectra of several different BiVO4/BiOIO3 samples (a) and corresponding band gap widths of different samples (b)

    α −Absorption coefficient; hv−Photon energy

    图  5  不同BiVO4/BiOIO3材料的光致发光光谱

    Figure  5.  Photoluminescence spectrum of different BiVO4/BiOIO3 materials

    图  6  不同BiVO4/BiOIO3材料的交流阻抗谱

    Figure  6.  EIS spectra of different BiVO4/BiOIO3 materials

    图  7  不同BiVO4/BiOIO3样品对AF的光催化活性

    Figure  7.  Photocatalytic activity of different BiVO4/BiOIO3 samples to AF

    图  8  不同MMT含量的MMT-65%BV/BO对AF的光降解(a)及相应的表观速率常数k(b)

    Figure  8.  The photodegradation of AF with different contents of MMT in MMT-65%BV/BO (a) and the associated apparent reaction rate constants k (b)

    图  9  40% MMT-65%BV/BO对有机污染物的光催化降解 (a)及相应的表观速率常数k(b)

    Figure  9.  Photocatalytic degradation of organic pollutants by 40% MMT-65%BV/BO (a) and the associated apparent reaction rate constants k (b)

    MO-Methyl orange; AF-Acid fuchsin; RhB-Rhodamine B; CV-Crystal violet; MB-Methylene blue; MG-Malachite green; TC-Tetracycline hydrochloride

    图  10  40% MMT-65%BV/BO光催化循环实验

    Figure  10.  Photocatalysis cycle experiment by 40% MMT-65%BV/BO

    图  11  40% MMT-65%BV/BO光催化剂使用前后XRD

    Figure  11.  XRD analysis before and after the use by 40% MMT-65%BV/BO photocatalysts

    图  12  不同捕获剂对40% MMT-65%BV/BO光催化降解AF的影响

    Figure  12.  Effect of different trapping agents on the photocatalytic degradation of AF by 40% MMT-65%BV/BO

    EDTA-2Na—Ethylenediamine tetraacetic acid disodium salt; IPA—Isopropyl alcohol

    图  13  40% MMT-65%BV/BO光催化降解AF可能机制

    Figure  13.  The proposed mechanism of the photocatalytic degradation of AF by 40% MMT-65%BV/BO

    表  1  BiVO4/BiOIO3复合材料的命名

    Table  1.   Naming of BiVO4/BiOIO3 composites

    Sample Mass of BiVO4 /g Mass ratio of BiVO4
    to BiOIO3/wt%
    35% BiVO4/BiOIO3 0.162 35
    45% BiVO4/BiOIO3 0.208 45
    55% BiVO4/BiOIO3 0.255 55
    65% BiVO4/BiOIO3 0.301 65
    下载: 导出CSV

    表  2  蒙脱土- 65%BiVO4/BiOIO3复合材料的命名

    Table  2.   Naming of MMT-65%BiVO4/BiOIO3 composites

    Sample Mass of MMT /g Mass ratio of MMT
    to 65%BV/BO/wt%
    10% MMT-65%BV/BO 0.076 10
    20% MMT-65%BV/BO 0.153 20
    30% MMT-65%BV/BO 0.229 30
    40% MMT-65%BV/BO 0.306 40
    下载: 导出CSV

    表  3  不同材料的比表面积、孔容及孔径

    Table  3.   Specific surface area, pore volume and pore diameter of different materials

    Sample Specific
    surface
    area /(m2.g−1)
    Pore
    volume/
    (cm3.g−1)
    Pore
    diameter/
    nm
    BiVO4 0.803 0.012 2.674
    BiOIO3 15.706 0.100 3.140
    65% BiVO4/BiOIO3 3.2337 0.024 2.849
    40%MMT-65%BV/BO 8.357 0.034 3.896
    下载: 导出CSV

    表  4  不同材料对酸性品红的光降解

    Table  4.   Photodegradation of acid fuchsin by different materials

    Sample Cat./AF
    mg/mg
    time/
    min
    degrading
    rate/%
    paper
    LaCoO3
    CeO2/ZnO
    100/1 60 98.94 [27]
    CeO2/ZnO 50/1 90 96.44 [28]
    Cs-Bi2WO6 25/1 105 87.2 [29]
    α-Bi2O3/CdS 12/1 240 81 [30]
    65%BiVO4/BiOIO3 33.3/1 60 98.5 This work
    下载: 导出CSV
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  • 收稿日期:  2024-07-05
  • 修回日期:  2024-08-16
  • 录用日期:  2024-08-25
  • 网络出版日期:  2024-09-06

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