Introduction
Bimonthly, started in 1957
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
Administrator
Shanxi Provincial Education Department
Sponsor
Taiyuan University of Technology
Publisher
Ed. Office of Journal of TYUT
Editor-in-Chief
SUN Hongbin
ISSN: 1007-9432
CN: 14-1220/N
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In Situ Synthesis of BiOBr/BiPO4Composite Photocatalyst and Its Photocatalytic Performance
DOI:
10.16355/j.cnki.issn1007-9432tyut.2020.03.004
Received:
Accepted:
| Corresponding author | Institute | |
| DING Guangyue | College of Chemistry and Chemical Engineering, Taiyuan University of Technology |
abstract:
In this article, BiOBr/BiPO4 composite photocatalyst was prepared by anion exchange method through in situ growing BiPO4 on the surface of BiOBr. As obtained BiOBr/BiPO4 composite photocatalyst was characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM), UV-Vis diffuse reflection spectroscopy(UV-Vis DRS) and transient photocurrent. The photocatalytic performance of as-obtained BiOBr/BiPO4 photocatalyst was evaluated by the degradation of MO under simulated sunlight irradiation. The results show that the degradation efficiency of BiOBr/BiPO4 composite photocatalyst was much higher than that of BiOBr and BiPO4 single component. When BiOBr and BiPO4 mole ratio was 9∶3, the composite exhibited the highest photocatalytic performance. This may be due to the fact that the in situ growing BiPO4 formed tight p-n heterojunction interface with BiOBr. The heterojunction reduced the recombination efficiency of photo-generated electrons and holes, and enhanced the separation efficiency of BiOBr/BiPO4 composite photocatalyst.
Keywords:
BiOBr; anion exchange; in situ growth; heterojunction; photocatalysis;