Acta Phys. -Chim. Sin. ›› 2014, Vol. 30 ›› Issue (11): 2113-2120.doi: 10.3866/PKU.WHXB201409052

• CATALYSIS AND SURFACE SCIENCE • Previous Articles     Next Articles

Hydrothermal Synthesis and Efficient Visible Light Photocatalytic Activity of Bi2MoO6/BiVO4 Heterojunction

LIN Xue1, GUO Xiao-Yu2, WANG Qing-Wei2, CHANG Li-Min2, ZHAI Hong-Ju2   

  1. 1. Key Laboratory of Preparation and Application Environmentally Friendly Materials, Ministry of Education, Jilin Normal University, Siping 136000, Jilin Province, P. R. China;
    2. College of Chemistry, Jilin Normal University, Siping 136000, Jilin Province, P. R. China
  • Received:2014-06-30 Revised:2014-09-04 Published:2014-10-30
  • Contact: LIN Xue, WANG Qing-Wei E-mail:jlsdlinxue@126.com;wqw611203@163.com
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21407059, 61308095) and Science Development Project of Jilin Province, China (20130522071JH, 20130102004JC, 20140101160JC).

Abstract:

A Bi2MoO6/BiVO4 photocatalyst with a heterojunction structure was synthesized by a one-pot hydrothermal method. Its crystal structure and microstructure were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and high-resolution transmission electron microscopy (HRTEM). The FESEM and HRTEM images indicated that Bi2MoO6 nanoparticles were loaded on the surface of BiVO4 nanoplates to form a heterojunction. The ultraviolet visible (UV-Vis) diffuse reflection spectra (DRS) showed that the resulting Bi2MoO6/BiVO4 heterojunction possessed more intensive absorption within the visible light range compared with pure Bi2MoO6 and BiVO4. These excellent structural and spectral properties endowed the Bi2MoO6/BiVO4 heterojunction with enhanced photocatalytic activity. It was found that the Rhodamine B (RhB) degradation rate with Bi2MoO6/BiVO4 was higher than that with pure BiVO4 and Bi2MoO6 under visible light (λ>420 nm) by photocatalytic measurements. The enhanced photocatalytic performance of the Bi2MoO6/BiVO4 sample can be attributed to the improved separation efficiency of photogenerated hole-electron pairs generated by the heterojunction between Bi2MoO6 and BiVO4, intensive absorption within the visible light range, and high specific surface area.

Key words: Bi2MoO6/BiVO4, Composite material, Nanostructure, Photocatalytic activity

MSC2000: 

  • O643