Issue 12, 2024

Synergistic enhancement of hydrogen peroxide generation: WO3 photocatalyst modified with MXene and Au nanoparticles under visible light

Abstract

A novel composite material composed of WO3, Ti3C2Tx MXene, and Au for the photocatalytic formation of hydrogen peroxide (H2O2) is introduced here. Through optimization, the ideal MXene and Au concentrations were determined to be both 0.5%. And after loading Au and MXene the amount of H2O2 generated increases to 7.52 mg L−1 at pH 3, which is a remarkable 21.5-fold increase. Quenching experiments unequivocally revealed identified ·O2 as the predominant intermediate product, indicating a two-stage, single-electron indirect mechanism. Enhanced effectiveness for H2O2 synthesis is ascribed to the synergistic impact of Ti3C2Tx MXene and gold, enhancing charge transfer efficiency while impeding the recombination of these electron–hole pairs.

Graphical abstract: Synergistic enhancement of hydrogen peroxide generation: WO3 photocatalyst modified with MXene and Au nanoparticles under visible light

Supplementary files

Article information

Article type
Paper
Submitted
05 Apr 2024
Accepted
14 May 2024
First published
14 May 2024

Catal. Sci. Technol., 2024,14, 3502-3513

Synergistic enhancement of hydrogen peroxide generation: WO3 photocatalyst modified with MXene and Au nanoparticles under visible light

X. Sun and T. Ohno, Catal. Sci. Technol., 2024, 14, 3502 DOI: 10.1039/D4CY00443D

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