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Effects of nano TiO_2 coating as a photo catalyst in clearing airborne pollutants

By Xiao Jinsong, Zi Xuehong, Yin Xueyun, Kang Tianfang, Ma Chongfang and Song Ruijin Beijing Polytechnic University, China  
Experiment results indicate that the absorption of formaldehyde, sulfur dioxide, nitrous acid gas by the support and glass plates is very weak; the influence of UV light on the concentration of these gases is not strong when black lamps used and the glass plates only with support; while the glass plates with nano TiO 2 coating are exposed to UV light, over 80% of formaldehyde is converted into water and hydrocarbon in 40 minutes, over 98% of sulfur dioxide is oxidized into sulfate in 18 minutes and over 95% of nitrous acid gas is oxidized into nitrate group in 11 minutes. The intensity of UV light also has effects on the oxidation of NO 2 and SO 2. Recommends that this nano coating be used in cleaning indoor and outdoor air.
【Fund】: 国家“九五”重点基础研究项目 (G2 0 0 0 0 2 6 3);; 卫生部“十五” 国家医学科技攻关课题“室内空气重点污染物健康危害控制技术 研究”;; 北京工业大学“九五”;; “十五”期间“2 1 1”经费资助
【CateGory Index】: X51
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