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Effective solar light-driven isothiazolinone degradation by morphology- and oxygen vacancy-modified Gd-doped BiOCl

Antibacterial isothiazolinones are refractory organic pollutants towards biodegradation, existing in reverse osmosis concentrated water and other relevant industrial wastewater, which need to be decomposed before getting discharged into a water body. Herein, we synthesized Gd-doped flower-like hiera...

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Bibliographic Details
Published in:New journal of chemistry 2024-04, Vol.48 (14), p.6168-6179
Main Authors: Xu, Lei, Guo, Zhiren, Zhang, Xiao, Zhang, Menglin, Li, Jinying, Zhang, Dongxiang, Xu, Xiyan
Format: Article
Language:English
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Summary:Antibacterial isothiazolinones are refractory organic pollutants towards biodegradation, existing in reverse osmosis concentrated water and other relevant industrial wastewater, which need to be decomposed before getting discharged into a water body. Herein, we synthesized Gd-doped flower-like hierarchical BiOCl (PGE-BiOCl) with promoted visible light response using a facile solvothermal method. The pseudo-first-order rate constant of 1,2-benzisothiazolinone-3-one (BIT) degradation was enhanced 6.49-fold by PGE-BiOCl ( k = 0.610 h −1 ) compared to BiOCl ( k = 0.094 h −1 ) under simulated visible light. It is mainly due to the synergistic effect of abundant Ovs, highly exposed (110) dominant crystal planes, and Gd doping of PGE-BiOCl. The scavenger experiments and EPR characterizations indicated that O 2 &z.rad; − was the dominant radical in the degradation system. The DFT calculation further confirmed the existence of O 2p orbitals near the Fermi level, which may narrow the band gap of BiOCl and improve the charge carrier separation efficiency. This work offered a promising approach for the preparation of an effective solar light-driven photocatalyst for the degradation of refractory organic pollutants in water. Gd doped flower-like hierarchical BiOCl with highly exposed (110) facets and abundant oxygen vacancies exhibits a good photocatalytic potential.
ISSN:1144-0546
1369-9261
DOI:10.1039/d4nj00443d