Photocatalytic oxidation of toluene and isopropanol by LaFeO3/black-TiO2

Large amount of volatile organic compounds (VOCs) are emitted from industrial, mobile, and domestic sources, causing adverse effects on human health and environment. Among VOCs, toluene and isopropanol (IPA) are commonly used as solvent, soldering flux, and spray paint and their emissions need to be...

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Bibliographic Details
Published in:Environmental science and pollution research international 2019-07, Vol.26 (20), p.20908-20919
Main Authors: Lee, Yun-En, Chung, Wei-Chieh, Chang, Moo-Been
Format: Article
Language:English
Subjects:
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Contaminants
Dioxins
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Ethers
Fetuses
Mathematical models
Molecular weight
Organic compounds
Organochlorine pesticides
Oxidation
PCB
PCB compounds
Performance prediction
Pesticides
Photocatalysis
Physicochemical properties
Placenta
Polarity
Polybrominated diphenyl ethers
Polychlorinated biphenyls
Regression
Research Article
VOCs
Volatile organic compounds
Waste Water Technology
Water Management
Water Pollution Control
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Summary:Large amount of volatile organic compounds (VOCs) are emitted from industrial, mobile, and domestic sources, causing adverse effects on human health and environment. Among VOCs, toluene and isopropanol (IPA) are commonly used as solvent, soldering flux, and spray paint and their emissions need to be reduced. Several VOCs abatement technologies are available to reduce VOC emission and photocatalytic oxidation of VOC is regarded as a viable technique due to its advantage of utilizing solar energy. TiO 2 has been investigated for its oxidation capability toward VOCs because of its good photocatalytic activity. However the utilization is limited to UV due to its wider bandgap; furthermore, its fast recombination rate of electron-hole pair reduces the oxidation rate of VOCs. Black-TiO 2 and perovskite-type photocatalyst such as LaFeO 3 can be applied to enhance photocatalytic activity due to narrower bandgap and longer electron-hole pair lifetime. In this study, black-TiO 2 and LaFeO 3 are prepared and investigated for their photocatalytic oxidation rates toward toluene and IPA. Results show that toluene removals achieved with black-TiO 2 and LaFeO 3 are 89% and 98% while IPA removals are 90% and 94%, respectively. Both photocatalysts show better photocatalytic activity than TiO 2 and good absorption capability toward visible light. Graphical abstract
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-019-05436-z