Issue 39, 2023

Hierarchically porous CsPbBr3@HZIF-8 heterojunctions for high-performance photocatalytic degradation of antibiotics in high-salinity wastewater

Abstract

The photocatalytic degradation of tetracycline hydrochloride (TCH) under high salinity poses a significant challenge due to the inhibitory effect of coexisting ions on reactive oxygen species in wastewater. Herein, a series of hierarchically porous Z-scheme CsPbBr3@HZIF-8 heterojunctions were synthesized by a sequential deposition method. Benefiting from the stable hierarchical pore structure of HZIF-8 and the excellent optoelectronic properties of CsPbBr3, the hierarchical pore Z-scheme heterojunction CsPbBr3@HZIF-8 not only facilitates the mass transfer and enrichment of pollutants but also accelerates the transfer of carriers between HZIF-8 and CsPbBr3, leading to enhanced generation of reactive oxygen species. Moreover, CsPbBr3 serves as a photosensitizer for energy transfer, generating singlet oxygen (1O2) with higher resistance to ion interference. As a result, the 4%-CsPbBr3@HZIF-8 achieved the highest visible light degradation efficiency of TCH (94% in 40 min), surpassing those of most reported CsPbBr3-based photocatalysts. The catalytic system consistently degrades contaminants in deionized water, high ion concentrations, and real water matrices. The photocatalytic reaction mechanisms, involving charge carrier transfer, reactive species generation, and TCH degradation intermediate products, are thoroughly investigated.

Graphical abstract: Hierarchically porous CsPbBr3@HZIF-8 heterojunctions for high-performance photocatalytic degradation of antibiotics in high-salinity wastewater

Supplementary files

Article information

Article type
Paper
Submitted
16 Jūl. 2023
Accepted
06 Sept. 2023
First published
21 Sept. 2023

J. Mater. Chem. C, 2023,11, 13570-13578

Hierarchically porous CsPbBr3@HZIF-8 heterojunctions for high-performance photocatalytic degradation of antibiotics in high-salinity wastewater

Y. Hou, F. Meng, J. He, M. Dong, J. Tong, J. Sun, C. Sun, X. Wang and Z. Su, J. Mater. Chem. C, 2023, 11, 13570 DOI: 10.1039/D3TC02493H

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