Gas Phase Photocatalytic Oxidation Of VOC Using TiO2-containing Paint: Influence Of NO And Relative Humidity
Price
Free (open access)
Transaction
Volume
101
Pages
9
Published
2007
Size
310 kb
Paper DOI
10.2495/AIR070581
Copyright
WIT Press
Author(s)
Th. Maggos, P. Leva, J. G. Bartzis, Ch. Vasilakos & D. Kotzias
Abstract
Advanced oxidation process (AOP) such as photocatalysis is a promising technology for air purification. It is the purpose of this study to investigate the photocatalytic removal of volatile organic compound (VOC) using TiO2- containing paints. The photocatalytic activity of the paint was studied in a walkin type environmental chamber (30 m3) under a realistic level of irradiation, humidity and VOC amount with reference to a typical urban air pollutant concentration. The effects of concurrent photodegradation of NO and VOC as well as the effect of the relative humidity level were also investigated in order to evaluate the feasibility of the photocatalytic building material (paint) for air purification under real conditions. It was found that the presence of NO promoted the photodegradation of toluene, under low humidity levels (17% RH), up to 15%. It was suggested that the enhancement of toluene conversion was due to the generation of OH. radicals during the photodegradation of NO. Results were also showed that no photodegradation of toluene was found while increasing humidity up to 50%. Keywords: photocatalysis, TiO2, photocatalytic paint, VOCs, NO, air purification, relative humidity.
Keywords
photocatalysis, TiO2, photocatalytic paint, VOCs, NO, air purification, relative humidity.