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首页> 外文期刊>Chemical Engineering Science >Indoor air purification by photocatalyst TiO2 immobilized on an activated carbon filter installed in an air cleaner
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Indoor air purification by photocatalyst TiO2 immobilized on an activated carbon filter installed in an air cleaner

机译：通过固定在空气滤清器中安装的活性炭过滤器上的光催化剂TiO2净化室内空气

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摘要

The enhancement effect of using TiO2 immobilized on activated carbon (TiO2/AC) filter for removing indoor air pollutant at parts-per=billion (ppb) levels has been previously reported. To further evaluate the TiO2/AC filter for practical application, it was installed in an air cleaner available in the commercial market and tested inside an environmental chamber. Nitrogen oxide (NO) and toluene were selected as target pollutant. Results showed that a higher removal efficiency of NO was achieved using shorter wavelength ultraviolet lamp than longer wavelength ultraviolet lamp. A higher NO removal was achieved using TiO2/AC filter compared to TiO2 filter only. The intermediate, NO2, generated from the photodegradation of NO was also successfully suppressed from exiting the system using TiO2/AC filter. A 25% higher of nitrogen oxides (NO,) was achieved using TiO2/AC filter compared to the TiO2/AC only. The higher removal efficiency of using TiO2/AC is owing to the large adsorption capacity provided by the activated carbon. The adsorbed NO is then transferred to the TiO2 for photodegradation. The difference in toluene removal efficiency using TiO2/AC filter compared to the TiO2 filter is even more significant. (C) 2004 Elsevier Ltd. All rights reserved.
机译：先前已经报道了使用固定在活性炭（TiO2 / AC）过滤器上的TiO2去除百万分之几（ppb）含量的室内空气污染物的增强效果。为了进一步评估TiO2 / AC过滤器的实际应用，将其安装在商用空气过滤器中，并在环境室内进行了测试。选择氮氧化物和甲苯作为目标污染物。结果表明，使用短波长的紫外灯比长波长的紫外灯获得更高的NO去除效率。与仅使用TiO2过滤器相比，使用TiO2 / AC过滤器可获得更高的NO去除率。使用TiO2 / AC过滤器也成功地抑制了由NO的光降解产生的中间体NO2退出系统。与仅使用TiO2 / AC相比，使用TiO2 / AC过滤器可将氮氧化物（NO）含量提高25％。使用TiO2 / AC的较高去除效率是由于活性炭提供的大吸附能力。然后将吸附的NO转移到TiO2中进行光降解。与TiO2过滤器相比，使用TiO2 / AC过滤器的甲苯去除效率差异更大。 （C）2004 Elsevier Ltd.保留所有权利。

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