Inverse opal structured Pt/TiO2–MnOy photothermocatalysts for enhanced toluene degradation activity

Abstract

Photothermocatalysis is gaining increasing scientific attention for its potential in alleviating the ever-worsening volatile organic compound (VOC) pollution. Herein, we fabricated inverse opal (IO) structured TiO2–MnOy photothermocatalysts whose photothermocatalytic toluene degradation performance varied significantly at different Ti-to-(Ti + Mn) ratios. The rate constant for photothermocatalytic toluene degradation for the best TiO2–MnOy sample was 11.3 times and 12.1 times higher than that of the TiO2 and MnOy sample, respectively, reaching 0.03812 min−1. This high activity arose from the IO structure which contained abundant macropores and contributed to enhancement of catalytic activity by enhancing light absorption and toluene adsorption capability. Deposition of Pt nanoparticles which were dual-functional photo-thermal (co)catalysts led to further enhancement of toluene degradation activity by promoting the toluene adsorption on the MnOy surface and activating O2 to form reactive oxygen species. Moreover, the formation of a Schottky junction between Pt and TiO2 also enhanced the charge separation and utilization efficiency, allowing for more efficient generation of active species for toluene activation and catalyst re-oxidation for achieving high toluene degradation activity.

Graphical abstract: Inverse opal structured Pt/TiO2–MnOy photothermocatalysts for enhanced toluene degradation activity

Supplementary files

Article information

Article type
Paper
Submitted
05 мај 2024
Accepted
15 јул. 2024
First published
26 јул. 2024

J. Mater. Chem. A, 2024, Advance Article

Inverse opal structured Pt/TiO2–MnOy photothermocatalysts for enhanced toluene degradation activity

Z. Chi, Z. Liu, W. Liu, J. Cai, Y. Zhang, Y. Dai, J. Zhang, Z. Ye and B. Tian, J. Mater. Chem. A, 2024, Advance Article , DOI: 10.1039/D4TA03123G

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