高级检索

  • ISSN 1006-3080
  • CN 31-1691/TQ

纳米片组装的花球状BiOI光催化剂

廖春鑫 卢泽强 陈爱平 朱鸣凡 李春忠

廖春鑫, 卢泽强, 陈爱平, 朱鸣凡, 李春忠. 纳米片组装的花球状BiOI光催化剂[J]. 华东理工大学学报(自然科学版). doi: 10.14135/j.cnki.1006-3080.20201207003
引用本文: 廖春鑫, 卢泽强, 陈爱平, 朱鸣凡, 李春忠. 纳米片组装的花球状BiOI光催化剂[J]. 华东理工大学学报(自然科学版). doi: 10.14135/j.cnki.1006-3080.20201207003
Liao Chunxin, Lu Zeqiang, Chen Aiping, Zhu Mingfan, Li Chunzhong. Flower Spherical BiOI Photocatalyst Fabricated by Nanosheets[J]. Journal of East China University of Science and Technology. doi: 10.14135/j.cnki.1006-3080.20201207003
Citation: Liao Chunxin, Lu Zeqiang, Chen Aiping, Zhu Mingfan, Li Chunzhong. Flower Spherical BiOI Photocatalyst Fabricated by Nanosheets[J]. Journal of East China University of Science and Technology. doi: 10.14135/j.cnki.1006-3080.20201207003

纳米片组装的花球状BiOI光催化剂

doi: 10.14135/j.cnki.1006-3080.20201207003
基金项目: 国家自然科学基金(21838003, 91834301)、上海市科技创新项目(18JC1410600, 19JC1410400)、上海市教委创新计划、中央高校基础研究基金(222201718002)
详细信息
    作者简介:

    廖春鑫(1996—),女,广西南宁,硕士研究生,主要研究方向:光电催化。E-mail:506890172@qq.com

    通讯作者:

    陈爱平,E-mail:apchen@ecust.edu.cn(注:E-mail请与以后的邮件联系方式一致)

  • 中图分类号: TQ174

Flower Spherical BiOI Photocatalyst Fabricated by Nanosheets

  • 摘要: 以硝酸铋和碘化钾为原料,水和乙二醇单甲醚的混合液为溶剂,通过水-溶剂热反应制备BiOI可见光光催化剂。采用XRD、SEM、UV-Vis DRS和BET等方法对样品进行了测试和表征。以甲基橙作为模型污染物,测试BiOI在可见光下的光催化活性。结果表明:乙二醇单甲醚在混合溶剂中的比例对于BiOI光催化剂的形貌和性能有显著影响,乙二醇单甲醚的体积分数为50%时,降解效果最佳,降解率达到77.9%,约为纳米片状BiOI光催化剂的14倍。提出了可见光下BiOI的光催化机理。

     

  • 图  1  不同溶剂比例下制备的BiOI样品的XRD图

    Figure  1.  XRD pattern of BiOI samples prepared under different solvent ratios

    图  2  不同比例乙二醇单甲醚下合成的BiOI的SEM图

    Figure  2.  SEM image of BiOI synthesized under different ratios of 2-methoxyethanol

    图  3  BiOI样品的氮气吸附-脱附等温线及孔径分布曲线(插图)

    Figure  3.  Nitrogen adsorption–desorption isotherms and the corresponding pore size distribution curve (inset) of BiOI samples.

    图  4  (a)BiOI样品的UV-Vis漫反射光谱,(b)BiOI样品的(αhν)1/2和hν的关系图

    Figure  4.  (a) UV-Vis DRS of the BiOI samples;(b)the plots of (αhν)1/2 vs hν of BiOI samples

    图  5  (a)甲基橙的光催化降解曲线;(b)一阶动力学拟合图

    Figure  5.  (a) Photocatalytic degradation curve of MO; (b) fitting plots of pseudo-first-order kinetics.

    图  6  BiOI-50在捕捉剂存在下对MO光降解过程的影响

    Figure  6.  Effects of scavenger on the photodegradation process of MO over BiOI-50

    图  7  BiOI的光催化机理图(PDP:光催化降解产物)

    Figure  7.  Photocatalytic mechanism diagram of BiOI(PDP:Photocatalytic Degradation Products)

    表  1  溶剂比例对BiOI样品晶相结构的影响

    Table  1.   Effects of solvent ratio on the crystallite structure of BiOI samples

    SamplesL /nm Crystallite sizeI(102)∶I(110)
    BiOI-080.92.78
    BiOI-2527.90.99
    BiOI-5026.20.81
    BiOI-7518.21.03
    下载: 导出CSV

    表  2  溶剂比例对BiOI样品比表面积、禁带宽度和速率常数的影响

    Table  2.   The effects of solvent ratio on the specific surface area, Eg and rate constant of BiOI samples

    SampleSBET/(m2·g−1)Eg/eVReaction rateconstant k/(×10−3·min−1)
    BiOI-01.961.630.56
    BiOI-2523.141.664.64
    BiOI-5037.361.757.83
    BiOI-7533.761.675.41
    下载: 导出CSV
  • [1] YAN Y H, ZHOU Z X, CHENG Y, et al. Template-free fabrication of alpha- and beta-Bi2O3 hollow spheres and their visible light photocatalytic activity for water purification[J]. Journal Of Alloys And Compounds, 2014, 605: 102-108. doi: 10.1016/j.jallcom.2014.03.111
    [2] ZHANG L, YU W, HAN C, et al. Large scaled synthesis of heterostructured electrospun TiO2/SnO2 nanofibers with an enhanced photocatalytic activity[J]. Journal Of the Electrochemical Society, 2017, 164(9): H651-H656. doi: 10.1149/2.1531709jes
    [3] 刘胜优, 杨晓华, 杨化桂. TiO2/TiSi2复合材料的制备及其可见光光催化性能[J]. 华东理工大学学报(自然科学版), 2018(3): 356-361.
    [4] 姜焕伟, 王郁, 董美玉, 胥峥, 李涵. 负载型纳米TiO2光催化降解水中微量二氯乙烷[J]. 华东理工大学学报(自然科学版), 2003(3): 281-283, 298. doi: 10.3969/j.issn.1006-3080.2003.03.016
    [5] CHENG H F, HUANG B B, DAI Y. Engineering BiOX (X = Cl, Br, I) nanostructures for highly efficient photocatalytic applications[J]. Nanoscale, 2014, 6(4): 2009-2026. doi: 10.1039/c3nr05529a
    [6] YE L Q, DENG K J, XU F, et al. Increasing visible-light absorption for photocatalysis with black BiOCl[J]. Physical Chemistry Chemical Physics, 2012, 14(1): 82-85. doi: 10.1039/C1CP22876E
    [7] HUANG H W, HAN X, LI X W, et al. Fabrication of multiple heterojunctions with tunable visible-light-active photocatalytic reactivity in BiOBr-BiOI full-range composites based on microstructure modulation and band structures[J]. ACS Appl Mater Interfaces, 2015, 7(1): 482-492. doi: 10.1021/am5065409
    [8] HE R A, CAO S W, GUO D P, et al. 3D BiOI-GO composite with enhanced photocatalytic performance for phenol degradation under visible-light[J]. Ceramics International, 2015, 41(3): 3511-3517. doi: 10.1016/j.ceramint.2014.11.003
    [9] XIAO X, ZHANG W D. Facile synthesis of nanostructured BiOI microspheres with high visible light-induced photocatalytic activity[J]. Journal of Materials Chemistry, 2010, 20(28): 5866-5870. doi: 10.1039/c0jm00333f
    [10] HAO R, XIAO X, ZUO X X, et al. Efficient adsorption and visible-light photocatalytic degradation of tetracycline hydrochloride using mesoporous BiOI microspheres[J]. Journal of Hazardous Materials, 2012, 209: 137-145.
    [11] CAO J, XU B Y, LIN H L, et al. Chemical etching preparation of BiOI/BiOBr heterostructures with enhanced photocatalytic properties for organic dye removal[J]. Chemical Engineering Journal, 2012, 185: 91-99.
    [12] HU J, WENG S X, ZHENG Z Y, et al. Solvents mediated-synthesis of BiOI photocatalysts with tunable morphologies and their visible-light driven photocatalytic performances in removing of arsenic from water[J]. Journal of Hazardous Materials, 2014, 264: 293-302. doi: 10.1016/j.jhazmat.2013.11.027
    [13] PAN M, ZHANG H J, GAO G D, et al. Facet-dependent catalytic activity of nanosheet-assembled bismuth oxyiodide microspheres in degradation of bisphenol A[J]. Environmental Science & Technology, 2015, 49(10): 6240-6248.
    [14] HE R A, ZHANG J F, YU J G, et al. Room-temperature synthesis of BiOI with tailorable (001) facets and enhanced photocatalytic activity[J]. Journal of Colloid and Interface Science, 2016, 478: 201-208. doi: 10.1016/j.jcis.2016.06.012
    [15] 张格红. 低价带金属氧化物光催化剂的制备及其降解水中抗生素研究[D]. 长安大学, 2014.
    [16] ZHANG X, AI Z H, JIA F L, et al. Generalized one-pot synthesis, characterization, and photocatalytic activity of hierarchical BiOX (X = Cl, Br, I) nanoplate microspheres[J]. Journal of Physical Chemistry C, 2008, 112(3): 747-753. doi: 10.1021/jp077471t
    [17] LIU S W, YU J G. Cooperative self-construction and enhanced optical absorption of nanoplates-assembled hierarchical Bi2WO6 flowers[J]. Journal of Solid State Chemistry, 2008, 181(5): 1048-1055. doi: 10.1016/j.jssc.2008.01.049
    [18] TANG J W, ZOU Z G, YE J H. Efficient photocatalytic decomposition of organic contaminants over CaBi2O4 under visible-light irradiation[J]. Angewandte Chemie-International Edition, 2004, 43(34): 4463-4466. doi: 10.1002/anie.200353594
    [19] ZHANG J, SHI F J, LIN J, et al. Self-assembled 3-D architectures of BiOBr as a visible light-driven photocatalyst[J]. Chemistry of Materials, 2008, 20(9): 2937-2941. doi: 10.1021/cm7031898
    [20] TANG J W, ZOU Z G, YE J H. Efficient photocatalytic decomposition of organic contaminants over CaBi2O4 under visible-light irradiation[J]. Angewandte Chemie-International Edition, 2004, 43(34): 4463-4466. doi: 10.1002/anie.200353594
    [21] MA F Q, YAO J W, ZHANG Y F, et al. Unique band structure enhanced visible light photocatalytic activity of phosphorus-doped BiOI hierarchical microspheres[J]. Rsc Advances, 2017, 7(58): 36288-36296. doi: 10.1039/C7RA06261C
    [22] 林立. 新型卤氧化铋基光催化剂制备及其污染物去除性能的研究[D]. 东华大学, 2016.
    [23] JIANG J, ZHANG X, SUN P B, et al. ZnO/BiOI heterostructures: photoinduced charge-transfer property and enhanced visible-light photocatalytic activity[J]. Journal of Physical Chemistry C, 2011, 115(42): 20555-20564. doi: 10.1021/jp205925z
    [24] CAO J, XU B Y, LUO B D, et al. Novel BiOI/BiOBr heterojunction photocatalysts with enhanced visible light photocatalytic properties[J]. Catalysis Communications, 2011, 13(1): 63-68. doi: 10.1016/j.catcom.2011.06.019
    [25] LI T B, CHEN G, ZHOU C, et al. New photocatalyst BiOCl/BiOI composites with highly enhanced visible light photocatalytic performances[J]. Dalton Transactions, 2011, 40(25): 6751-6758. doi: 10.1039/c1dt10471c
    [26] LI Y Y, WANG J S, YAO H C, et al. Chemical etching preparation of BiOI/Bi2O3 heterostructures with enhanced photocatalytic activities[J]. Catalysis Communications, 2011, 12(7): 660-664. doi: 10.1016/j.catcom.2010.12.011
    [27] CHENG H F, HUANG B B, DAI Y, et al. One-step synthesis of the nanostructured AgI/BiOI composites with highly enhanced visible-light photocatalytic performances[J]. Langmuir, 2010, 26(9): 6618-6624. doi: 10.1021/la903943s
  • 加载中
图(7) / 表(2)
计量
  • 文章访问数:  184
  • HTML全文浏览量:  126
  • PDF下载量:  4
  • 被引次数: 0
出版历程
  • 收稿日期:  2020-12-07
  • 网络出版日期:  2021-04-07

目录

    /

    返回文章
    返回