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

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...

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Bibliographic Details
Published in:Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2024-12, Vol.12 (47), p.32913-32924
Main Authors: Chi, Zhili, Liu, Zhiyong, Liu, Wenbo, Cai, Jiaqi, Zhang, Yiyang, Dai, Yangmei, Zhang, Jinlong, Ye, Ziwei, Tian, Baozhu
Format: Article
Language:English
Subjects:
Adsorption
Catalysts
Catalytic activity
Charge efficiency
Degradation
Electromagnetic absorption
Nanoparticles
Organic compounds
Oxidation
Reactive oxygen species
Surface chemistry
Titanium dioxide
Toluene
VOCs
Volatile organic compounds
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Summary: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.
ISSN:2050-7488
2050-7496
DOI:10.1039/d4ta03123g