이산화티탄($TiO_2$ anatase) 분말을 광촉매로 사용한 노출 콘크리트의 VOCs(Benzene, Toluene)와 질소산화물(NOx) 제거 특성 연구

The Properties of VOCs(Benzene, Toluene) with NOx Removal in Exposed Concrete With $TiO_2$(Anatase type) Powder as Photocatalyst

Generally, $TiO_2$ powders absorb ultraviolet rays and make oxidation/reduction reactions on its surface. Hydroxide radical(OH), a product of photocatalyst reactions, has so strong oxidation/reduction electric potential that it can oxidize noxious gas like VOCs(Volatile Organic Compounds) and NOx. In this study, $TiO_2$ was substituted for exposed concrete to investigate the purifying degree of VOCs(Benzene, Toluene) and NOx. Anatase types of $TiO_2$ were used as photocatalyst. The sun rays and the ultraviolet were used as a light source. Anatase type $TiO_2$ was better than rutile type in purifying performance. The sunray showed the best purifying performance among the light sources. $3\%$ substitution of $TiO_2$ with the sunray was enough to purify VOCs(Benzene, Toluene) and NOx efficiently.