Preparation and characterization of Bi2O3-Bi2WO6 direct Z-scheme heterojunction and photocatalytic reduction of U(VI) under visible light irradiation

被引：0
|
作者：
Li X. [1 ]
He D. [1 ]
Li G. [2 ]
Wang Y. [1 ]
Cao X. [1 ]
Liu Y. [1 ]
机构：
[1] State Key Laboratory of Nuclear Resources and Environment, East China University of Technology, Nanchang
[2] Radiation Environment Monitoring Center of Guangdong Geological Bureau of Nuclear Industry, Guangzhou
来源：
Fuhe Cailiao Xuebao/Acta Materiae Compositae Sinica | 2021年 / 38卷 / 08期
关键词：
Bismuth tungstate; Direct Z-scheme heterojunction; Photocatalysis; Reduction; Uranium;
D O I：
10.13801/j.cnki.fhclxb.20201111.004
中图分类号：
学科分类号：
摘要：
According to the energy band theory, Bi(NO3)3·5H2O was used as bismuth source to synthesize Bi2O3-Bi2WO6 composite photocatalyst materials by hydrothermal calcination. The samples were characterized by means of SEM, XRD, XPS, DRS and EIS, respectively, and the photocatalytic activity was assessed in terms of reduction of U(VI) under visible light irradiation. The results show that the prepared Bi2O3-Bi2WO6 composite materials exhibit enhanced photocatalytic performance for the photo-reduction of U(VI) than the pure Bi2WO6, the optimized photocatalytic efficiency for U(VI) is achieved when the mole ratios of Bi2O3 to Bi2WO6 is 2.4:1. The improved photocatalytic activity is ascribed to the direct Z-scheme heterojunction between Bi2O3 and Bi2WO6, resulting in the rapid interfacial transfer of photoelectron-hole and wide light response range. This work provides a new idea to design and synthesize the photocatalysts with high visible light activity and understand the enhanced photocatalytic reduction mechanism of U(VI). © 2021, Editorial Office of Acta Materiae Compositae Sinica. All right reserved.
引用
下载
收藏
页码：2646 / 2654
页数：8
相关论文
共 30 条
  • [1] LIU C, SHU P C, XIE J, Et al., A half-wave rectified alternating current electrochemical method for uranium extraction from seawater, Nature Energy, 2, 4, (2017)
  • [2] WANG Ning, PANG Hongwei, YU Shujun, Et al., Investigation of adsorption mechanism of layered double hydroxides and their composites on radioactive uranium: A review, Acta Chimica Sinica, 77, pp. 143-152, (2019)
  • [3] HUANG Guolin, CHEN Zhongsheng, LIANG Xizhen, Et al., Adsorption behavior of U(VI) ions from aqueous solution on novel cross-linked magnetic chitosan beads, Journal of Chemical Industry and Engineering, 63, 3, pp. 834-840, (2012)
  • [4] SALOMONE V N, MEICHTRY J M, ZAMPIERI G, Et al., New insights in the heterogeneous photocatalytic removal of U(VI) in aqueous solution in the presence of 2-propanol, Chemical Engineering Journal, 261, pp. 27-35, (2015)
  • [5] WANG Guanghui, ZHEN Jie, ZHOU Limin, Et al., Adsorption and photocatalytic reduction of U(VI) in aqueous TiO<sub>2</sub> suspensions enhanced with sodium formate, Journal of Radioanalytical & Nuclear Chemistry, 304, pp. 579-585, (2015)
  • [6] GUO Yadan, JIANG Haiou, PU Xianzhong, Et al., Low-temperature synthesis and photocatalytic reduction of U(VI) of anatase TiO<sub>2</sub>, Journal of Ceramics, 37, 3, pp. 283-288, (2016)
  • [7] WANG Jingjing, WANG Yun, WANG Wei, Et al., Unable mesoporous g-C<sub>3</sub>N<sub>4</sub> nanosheets as a metal-free catalyst for enhanced visible-light-driven photocatalytic reduction of U(VI), Chemical Engineering Journal, 383, pp. 123-132, (2020)
  • [8] ZHANG Xiaojing, LIU Yang, ZHANG Qian, Et al., Bismuth and bismuth composite photocatalysts, Progress in Chemistry, 28, 10, pp. 1560-1568, (2016)
  • [9] GUO Qiyao, XU Hui, ZHENG Xuanqing, Synthesis and photocatalytic activity of Bi<sub>2</sub>WO<sub>6</sub>-SrTiO<sub>3</sub> heterostructure photocatalysts, Guangdong Chemical Industry, 44, 9, pp. 39-41, (2017)
  • [10] SITTIKORN Jonjana, ANUKORN Phuruangrat, SOMCHAI Thongtem, Et al., Synthesis, characterization and photocatalysis of heterostructure Ag-Br/Bi<sub>2</sub>WO<sub>6</sub> nanocompo-sites, Materials Letters, 216, pp. 92-96, (2018)
123