Li Bing-jie, Yang De-hui, Wu Shuai-qin, Li Bo-sen, Meng Hao, Jiang Si-peng, Liu Guo-jun, Zhao Yue-hui, Cui Hong-bo, Zhou Xue-mei, Zhong Zhao-hua
101 Institute, Ministry of Civil Affairs, Beijing 100070, China.
Zhonghua Yu Fang Yi Xue Za Zhi. 2008 Nov;42(11):831-5.
To develop and evaluate the efficiency of air purification and sterilization instrument based on nano-sized TiO(2) photocatalytic technique.
The nano-sized TiO(2) 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 TiO(2) photocatalytic instrument and ultraviolet (UV) were measured in closed labs. The on-site efficiency of the instrument was evaluated, too.
The nano-sized TiO(2) photocatalytic air purification and sterilization instrument was composed of five units: rough filter, nano-sized TiO(2) photocatalytic unit, activated carbon fiber filter, negative ion generator, and programmed control unit. The E.coli killing rates by the nano-sized TiO(2) 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).
The air sterilization efficiency of the nano-sized TiO(2) 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.
研发并评估基于纳米二氧化钛光催化技术的空气净化消毒仪器的效能。
设计并制备了纳米二氧化钛光催化空气净化消毒仪器样机。在封闭实验室内测定该纳米二氧化钛光催化仪器及紫外线（UV）对大肠杆菌和克雷伯菌的消毒效果，并对仪器进行现场效能评估。
纳米二氧化钛光催化空气净化消毒仪器由粗效过滤器、纳米二氧化钛光催化单元、活性炭纤维过滤器、负离子发生器及程序控制单元五个部分组成。纳米二氧化钛光催化仪器对大肠杆菌的杀灭率在30、60、90和120分钟时分别为76.0%、81.8%、77.5%和80.7%。除120分钟时间点外，该仪器对大肠杆菌杀灭率与紫外线无显著差异（P>0.05）。该仪器对克雷伯菌的杀灭率在30、60、90和120分钟时分别为78.4%、79.5%、67.3%和58.5%。该仪器在30和60分钟时对克雷伯菌的杀灭效果优于紫外线（P<0.01）。该仪器与紫外线对克雷伯菌的杀灭效果无显著差异（P>0.05）。
纳米二氧化钛光催化仪器的空气消毒效能与紫外线相当或更佳，可用于公共场所的空气净化消毒。
