摘要
目的研究光催化TiO2纳米涂料去除空气中有害气体的净化效果评价方法。方法利用4m3测试腔,以365nm的紫外光照射试样板,在光强度为107～271μW/cm2、风速0.3～1.5m/s的试验条件下,测试光催化纳米涂料去除SO2、NO2和甲醛的净化效果。结果在紫外灯照射下,纳米涂料板30min对SO2的净化效率为97%,对NO2的净化效率为90%,对甲醛净化效率为69%。无紫外光照射的纳米涂料板对SO2的净化效率为48%。结论该实验为建立纳米涂料净化空气污染物的评价方法提供了基础资料。提示不同环境因素对净化效果的影响有待进一步探讨。
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 μW/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.
出处
《环境与健康杂志》
CAS
CSCD
北大核心
2004年第4期231-232,共2页
Journal of Environment and Health
关键词
光催化
纳米涂料
评价研究
Photocatalysis
Nanocomposite coating
Evaluate studies
