期刊
SCIENCE OF THE TOTAL ENVIRONMENT
卷 704, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.scitotenv.2019.135406
关键词
Photocatalytic paint; Titanium dioxide (TiO2); Photopolymer resin; TiO2 immobilization; Photocatalysis; Water treatment
资金
- National Science Foundation (NSF) grants ERC Nanotechnology-Enabled Water Treatment (NEWT) Center [1449500, CHE-0748913, DMR PREM-1205302]
- United States Department of Agriculture (USDA) [2014-38422-22078]
- Welch Foundation Chemistry Department Research Grant of the University of Texas Permian Basin [AW-0013]
- NIFA [688262, 2014-38422-22078] Funding Source: Federal RePORTER
While the use of TiO2 nanoparticles in the form of slurry/suspension requires energy-intensive separation processes, its immobilization in solid support may open new opportunities in the area of sustainable water treatment technologies. In this study, a novel method for the development of photocatalytic paint based on TiO2 nanoparticles and acrylate-based photopolymer resin is reported. The paint (TiO2@polymer) was applied on substrates such as plastic petri dish and glass jar, which was polymerized/solidified by ultraviolet light irradiation. The painted petri dish and glass jar were used for the photocatalytic degradation of model organic pollutants viz. methyl orange (MO), methylene blue (MB), and indole in deionized water, simulated fresh drinking water, and tap water matrices. The photocatalytic degradation studies were performed under sunlight and UV-B light were used for. The sunlight-assisted photocatalytic degradation of MO and MB was found to be faster and more efficient than the UV-B light-assisted ones. Under UV-B light irradiation, it took 120 min to degrade about 80% of 6 ppm MB solution, whereas under sunlight irradiation it took 60 min to degrade about 90% of the same MB solution. The photocatalytic paint generated hydroxyl radical (center dot OH) under the UV-B and sunlight irradiation, which was studied by the terephthalic acid fluorescence tests. Further, the potential release of TiO2 during the exposure to UV irradiation was studied by single particle ICP-MS analysis. (C) 2019 Elsevier B.V. All rights reserved.
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