Journal
ENVIRONMENTAL SCIENCE & TECHNOLOGY
Volume 56, Issue 12, Pages 8722-8732Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.est.1c08643
Keywords
single-atom Pt catalyst; photothermal synergistic catalytic oxidation; full solar spectrum catalysis; toluene oxidation; catalytic oxidation mechanism
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Funding
- National Natural Science Foundation of China [21876006, 21976009, 21961160743]
- National Natural Science Committee of China-Liaoning Provincial People's Government Joint Fund [U1908204]
- Foundation on the Creative Research Team Construction Promotion Project of Beijing Municipal Institutions [IDHT20190503]
- Development Program for the Youth Outstanding-Notch Talent of Beijing Municipal Commission of Education [CITTCD201904019]
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This study investigates the photothermal synergistic catalytic oxidation of toluene over single-atom Pt catalysts. The results show that under simulated solar irradiation, the conversion and CO2 yield of toluene can be significantly increased with the addition of CuO and the generation of reactive oxygen species. The findings highlight the importance of the synergistic effect between photo- and thermocatalysis in developing efficient and low-energy consumption pollutant treatment technologies.
Photothermal synergistic catalytic oxidation of toluene over single-atom Pt catalysts was investigated. Compared with the conventional thermocatalytic oxidation in the dark, toluene conversion and CO2 yield over 0.39Pt(1)/CuO-CeO2 under simulated solar irradiation (lambda = 320-2500 nm, optical power density = 200 mW cm(-2)) at 180 degrees C could be increased about 48%. An amount of CuO was added to CeO2 to disperse single-atom Pt with a maximal Pt loading of 0.83 wt %. The synergistic effect between photo- and thermocatalysis is very important for the development of new pollutant treatment technology with high efficiency and low energy consumption. Both light and heat played an important role in the present photothermal synergistic catalytic oxidation. 0.39Pt(1)/CuO-CeO2 showed good redox performance and excellent optical properties and utilized the full-spectrum solar energy. Light illumination induced the generation of reactive oxygen species ((OH)-O-center dot and O-center dot(2)-), which accelerated the transformation of intermediates, promoted the release of active sites on the catalyst surface, and improved the oxidation reaction.
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