Issue 27, 2021, Issue in Progress

Fabrication of one dimensional hierarchical WO3/BiOI heterojunctions with enhanced visible light activity for degradation of pollutants

Abstract

One-dimensional (1D) hierarchical WO3/BiOI p–n (WB) heterojunctions with different mass percentages of WO3 were fabricated through a precipitation process. Various analytical techniques were employed to characterize the resulting WB composites, and their photocatalytic properties were measured by the degradation of rhodamine B (RhB) and methylene blue (MB) under irradiation of visible light. The WB heterojunctions showed largely enhanced photocatalytic performance as compared to the pure photocatalysts. Notably, the degradation rate constant of RhB by WB-10 was 3.3 and 33.6 times higher than those of pure BiOI and WO3, respectively. The enhanced activity could be attributed to the hierarchical p–n heterostructures, which can supply more reaction sites and effectively promote the separation of photogenerated charge carriers, as confirmed by PL and photocurrent. Trapping experiments implied that holes (h+) and superoxide anion radicals (˙O2) were the dominant active species for organic pollutants decomposition on the WB composites. This work may benefit the construction of hierarchical heterostructures with high photocatalytic efficiency.

Graphical abstract: Fabrication of one dimensional hierarchical WO3/BiOI heterojunctions with enhanced visible light activity for degradation of pollutants

Article information

Article type
Paper
Submitted
03 Mar 2021
Accepted
25 Apr 2021
First published
05 May 2021
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2021,11, 16608-16618

Fabrication of one dimensional hierarchical WO3/BiOI heterojunctions with enhanced visible light activity for degradation of pollutants

X. Lu, Q. Li, L. Wang, W. Jiang, R. Luo, M. Zhang, C. Cui, Z. Tian and G. Zhu, RSC Adv., 2021, 11, 16608 DOI: 10.1039/D1RA01665B

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