Facile fabrication of BUC-21/Bi24O31Br10 composites for enhanced photocatalytic Cr(VI) reduction under white light

By Chen Zhao, Zhihua Wang, Xiang Li, Xiao-Hong Yi, Hongyu Chu, Xi Chen, Chongchen Wang. 2020

155 citations recorded by the source corpus.

Abstract In this study, the Bi24O31Br10 nanosheets were successfully synthesized using hydrothermal method. Subsequently, series binary BUC-21/Bi24O31Br10 composites were fabricated by facile ball-milling method. The results suggested that the introduction of a specific quality of Bi24O31Br10 on the surface of BUC-21 could enhance the utilization efficiency of white light and suppress the photo-induced carriers recombination to promote the photocatalytic efficiency. The BB-100 (the mass ratio of BUC-21/Bi24O31Br10 being 1) exhibited the best performance, in which 99.9% Cr(VI) ions were photoreduced into Cr(III) upon the white light irradiation within 120 min. As well, the influences of small organic acids, initial pH, light intensities along with the co-existing matters on the Cr(VI) removal were investigated. Furthermore, the Box-Behnken experimental design methodology proved that the photoreduction process was significantly influenced by the co-existing inorganic anions and negatively charged dissolved organic matters (DOM). After 4-run recycling for the adsorption-photoreduction of Cr(VI) experiments, the BB-100 still exhibited satisfied reduction activity with good stability and reusability. A possible reaction mechanism was proposed and clarified through the electrochemical determination, time-resolved photoluminescence decay spectra, active species trapping experiments, electron spin resonance analyses (ESR) and density functional theory (DFT) calculation.

Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/1e41c0b1bb9b1236cb85d45e253d9889c3439084

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In Materials Chemistry

1. Chongchen Wang
2. Xiao-Hong Yi
3. Peng Wang
4. Wen Liu

In Renewable Energy, Sustainability and the Environment

1. Chongchen Wang
2. Xiao-Hong Yi
3. Wen Liu
4. Peng Wang
5. Xu Zhao

Citations in the corpus

• Photocatalysis-activated SR-AOP over PDINH/MIL-88A(Fe) composites for boosted chloroquine phosphate degradation: Performance, mechanism, pathway and DFT calculations (2021, methodology): “The influence of coexisting ions on the photocatalysis-activated SR-AOP process was further investigated by Box-Behnken experimental design methodology [40,41].”