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Chemosphere

Title:		Simultaneous photodegradation of VOC mixture by TiO(2) powders
Author(s):		Stucchi M; Galli F; Bianchi CL; Pirola C; Boffito DC; Biasioli F; Capucci V;
Address:		"Polytechnique Montreal, Departement de Genie Chimique, 2900 Edouard Montpetit Blvd, H3C 3A4 Montreal (QC), Canada. Polytechnique Montreal, Departement de Genie Chimique, 2900 Edouard Montpetit Blvd, H3C 3A4 Montreal (QC), Canada. Electronic address: federico.galli@polymtl.ca. Universita di Milano, Dipartimento di Chimica, Via Golgi 19, 20133 Milano, Italy. Research & Innovation Centre, Fondazione Edmund Mach, Via E. Mach 1, 38010 San Michele a/A, Italy. GranitiFiandre SpA, Via Ghiarola Nuova 119, 42014 Castellarano, Italy"
Journal Title:		Chemosphere
Year:		2018
Volume:		20171105
Issue:
Page Number:		198 - 206
DOI:		10.1016/j.chemosphere.2017.11.003
ISSN/ISBN:		1879-1298 (Electronic) 0045-6535 (Linking)
Abstract:		"Volatile and semi volatile organic compounds' concentration have dramatically increased in indoor environments in recent years. UV light promotes titanium dioxide, which oxidises various molecules; however, most of the studies report the degradation of a single VOC. Here, we investigate the photo-oxidation of 17 molecules in mixture to have a realistic test of TiO(2) efficacy. We compare P25, a nanometric catalyst, and 1077, a micrometric sample, that poses less health concerns. A proton-transfer-reaction mass spectrometer measured online the concentration of all the pollutants simultaneously. Aldehydes compete for the adsorption on both the catalyst's active sites and thus they degrade 70% and 55% with P25 and 1077 respectively. Considering the single pollutant oxidation, instead, aldehydes fully oxidize. Even though benzene is recalcitrant to degradation, P25 and 1077 reduced toluene's concentration to 97% and 96% in 55 min, respectively. Acetonitrile is refractory to photocatalysis"
Keywords:		"Adsorption Air Pollutants/analysis Aldehydes Benzene Catalysis *Models, Chemical Oxidation-Reduction *Photochemical Processes Photolysis Titanium/*chemistry Toluene Ultraviolet Rays Volatile Organic Compounds/*chemistry Indoor pollution Micrometric Ptr-ms;"
Notes:		"MedlineStucchi, Marta Galli, Federico Bianchi, Claudia L Pirola, Carlo Boffito, Daria C Biasioli, Franco Capucci, Valentino eng England 2017/11/14 Chemosphere. 2018 Feb; 193:198-206. doi: 10.1016/j.chemosphere.2017.11.003. Epub 2017 Nov 5"