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KMID : 0382420040300020092
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Korean Journal of Environmental Health Society
2004 Volume.30 No. 2 p.92 ~ p.97
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Improvement of Indoor Air Quality by Coating of Indoor Materials of TiO₂Photocatalyst Sol
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Yang Won-Ho
Jeong Mun-Ho
Kim Dae-Won
Yang Jin-Sup
Park Ki-Sun
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Abstract
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Three methods for VOCs emissions control in indoor air are reduction at the source, ventilation between indoor and outdoor, and removal. The best altemative should be to replace highly emitting sources with sources having low emissions, but the pertinent information on VOCs is not always available from manufactures. Other ways of improving indoor air quality are needed. It is to increase the outside fresh-air flow to dilute the pollutants, but this method would generally provide only a dilution effect without destruction in residence. An ideal alternative to existing technologies would be a chemical oxidation process able to treat large volumes of slightly contaminated air at normal temperature without additional oxidant such as o캐ne generator and ion generator. Photocatalytic oxidation(PCO) represents such a process. It is characterized by a surface reaction assisted by light radiation inducing the formation of superoxide, hydro-peroxide anions, or hydroxyl radicals, which are powerful oxidants. In comparison with other VOCs removal methods, PCO offers several advantages. The purpose of this study was to explore the possibilities for photocatalytic purification of slightly contaminated indoor air by using visible light such as flurescent visible light(FVL). In this study, a PCO of relatively concentrated benzene using common FVL lamps was investigated as batch type and total volatile organic com-pounds(TVOCs) using a common FVL lamp and penetrated sun light over window. The results of this study shown the possibility of TiO₂ photocatalyst application in the area of indoor air quality control.
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