Issue 5, 2022

Microwave-assisted synthesis of a Z-scheme heterojunction Ag/AgBr@BiOBr/Bi2O3 photocatalyst for efficient organic pollutant degradation under visible light

Abstract

A plasmonic Z-scheme photocatalyst comprised of Ag/AgBr-decorated BiOBr/Bi2O3 nanosheets was synthesized successfully using a rapid microwave-assisted one-step approach. The Ag/AgBr particles were generated simultaneously on the surface of the BiOBr/Bi2O3 nanosheets. This construction resulted in the formation of multiplex phenomena, including the surface plasmon resonance effect of Ag particles, the photosensitive role of AgBr in enhancing visible light utilization, and efficient charge transfer processes in the quaternary heterojunction photocatalyst. The as-prepared catalyst exhibited remarkable photocatalytic activity toward the destruction of tetracycline hydrochloride (TCH) (93.7%), methyl orange (MO) (96.6%), and rhodamine B (RhB) (100%) under visible light. The catalyst exhibited high photocatalytic stability under visible light irradiation, retaining 97% of its activity after nine cycles of MO degradation. This was attributed to the multiple synergistic mechanisms of the components following the Z-scheme mechanism, which facilitated rapid charge transfer and restricted the decomposition of AgBr to achieve high efficiency and stable catalysts.

Graphical abstract: Microwave-assisted synthesis of a Z-scheme heterojunction Ag/AgBr@BiOBr/Bi2O3 photocatalyst for efficient organic pollutant degradation under visible light

Supplementary files

Article information

Article type
Paper
Submitted
18 déc. 2021
Accepted
25 mars 2022
First published
25 mars 2022

Environ. Sci.: Nano, 2022,9, 1724-1737

Microwave-assisted synthesis of a Z-scheme heterojunction Ag/AgBr@BiOBr/Bi2O3 photocatalyst for efficient organic pollutant degradation under visible light

V. Q. Nguyen, M. A. Mahadadalkar, A. M. Rabie and J. Shim, Environ. Sci.: Nano, 2022, 9, 1724 DOI: 10.1039/D1EN01166A

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