Evaluation on Removal Effectiveness of Air Pollutants by Photocatalytic Nanocomposite Coating / 环境与健康杂志

ABSTRACT

Objective To evaluate the removal effectiveness of air pollutants by photocatalytic nanocomposite coating. Methods TiO2-coated glass board was exposed to UV light of 365 nm in chamber with volume of 4 m3. The purification efficiencies of TiO2 nanocomposite coating for SO2?NO2 and formaldehyde were determined at light intensity of 107-271 ?W/cm2 and wind velocity of 0.3-1.5 m/s. Results The purification efficiencies of TiO2-coated glass board treated under this experimental condition for 30 min were 97%?90%, 69% for SO2?NO2 and formaldehyde in indoor air respectively, and only 48% for SO2 without exposure to UV light. Conclusion This method provided basic data for establishing an evaluation method for purification effectiveness of photocatalytic nanocomposite coating for indoor air pollutants. Further approach was needed for exploring the effects of various environmental influential factors on the purification effectiveness of TiO2 nanocomposite coating.