纳米二氧化钛光催化技术消毒和净化空气的应用研究  

Application of nano-sized TiO2 photocatalysis to air purification and sterilization

作　　者：李秉杰 杨德慧 武帅钦[2] 李伯森 孟浩 姜思朋 刘国军 赵月辉[2] 崔洪波[2] 周雪媚[2] 钟照华[2] 

机构地区：[1]民政部一零一研究所,北京100070 [2]哈尔滨医科大学微生物学教研室

出　　处：《中华预防医学杂志》2008年第11期831-835,共5页Chinese Journal of Preventive Medicine

基　　金：财政部2007年中央级公益性科研院所基本科研业务费专项课题（2007）

摘　　要：目的研制纳米二氧化钛（TiO2）光催化空气净化消毒器，并测试其空气消毒净化效果。方法设计和制作纳米TiO2光催化空气净化消毒器样机。在封闭实验室将大肠埃希菌、克雷伯菌制成气雾，比较紫外线和纳米TiO2光催化空气净化消毒器消毒后残余细菌总数。在大型公共场所测试纳米TiO2光催化空气净化消毒器对空气净化和消毒的效率。结果纳米TiO2光催化空气净化消毒器由粗效过滤器、纳米TiO2光催化反应器、活性炭纤维吸附层、电空气负离子发生器和智能化微处理程序共5部分组成。纳米TiO2光催化法在30min、60min、90min、120min对空气大肠埃希菌的杀灭率分别为76．O％、81．8％、77．5％、80．7％。纳米TiO2光催化法上述时间点对空气克雷伯菌的杀灭率分别为78．4％、79．5％、67．3％、58．5％；30min、60min时间点紫外线对空气克雷伯菌的杀灭率56．1％、63．2％。结论纳米TiO2光催化空气净化消毒器的空气消毒效果等同或优于紫外线，可用于大型公共场所的空气净化和消毒作用。Objective To develop and evaluate the efficiency of air purification and sterilization instrument based on nano-sized TiO2 photocatalytic technique. Methods The nano-sized TiO2 photocatalytic air purification and sterilization instrument was designed and a sample had been prepared. The sterilization efficiencies for E. coli and Klebsiella by the nano-sized TiO2 photocatalytic instrument and ultraviolet （UV） were measured in closed labs. The on-site efficiency of the instrument was evaluated, too. Results The nano-sized TiO2 photocatalytic air purification and sterilization instrument was composed of five units： rough filter, nano-sized TiO2 photocatalytic unit, activated carbon fiber filter, negative ion generator, and programmed control unit. The E. coli killing rates by the nano-sized TiO2 photocatalytic instrument were 76.0%, 81.8%, 77. 5%, and 80. 7% at 30,60,90, and 120 minutes, respectively. There was no significant difference between the E. coli killing rates of the instrument and UV （ P 〉 0.05 ）, except the 120 minutes timepoint. The Klebsiella killing rates by the instrument were 78.4%, 79. 5 %, 67.3 %, and 58.5% at 30,60,90 ,and 120 minutes,respectively. The Klebsiella killing efficiencies of the instrument at 30 and 60 minutes were better than that of UV （ P 〈 0. 01 ）. There was no significant difference between the Klebsiella killing efficiencies of the instrument and UV （ P 〉 0. 05 ）. Conclusion The air sterilization efficiency of the nano-sized TiO2 photocatalytic instrument should be equivalent or better as compared with the UV. This instrument might be used for the air purification and sterilization of the public locations.

关 键 词：钛 纳米金属粒 空气 消毒 

分 类 号：R686[医药卫生—骨科学]