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首页> 外文期刊>Journal of Hazardous Materials >Adsorption performance of titanium dioxide (TiO_2) coated air filters for volatile organic compounds
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Adsorption performance of titanium dioxide (TiO_2) coated air filters for volatile organic compounds

机译：涂有二氧化钛（TiO_2）的空气过滤器对挥发性有机化合物的吸附性能

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摘要

The photocatalytic oxidation (PCO) technology as an alternative method for air purification has been studied for decades and a variety of PCO models indicate that the adsorption of reactants on the catalyst surface is one of the major physical and chemical processes occurring at a heterogeneous photocatalytic reaction. However, limited study explored the adsorption effect of a photocatalyst. This study carried out a systematic evaluation of adsorption performance of titanium dioxide (TiO_2) coated fiberglass fibers (FGFs), TiO_2 coated carbon cloth fibers (CCFs), and original CCFs air filters at various relative humidity conditions for nine volatile organic compounds. TiCh/FGFs, TiO_2/CCFs, and CCFs were characterized by SEM for morphology and N_2 adsorption isotherm for BET surface area and pore structure. A bench-scale adsorption test setup was constructed and adsorption tests were performed at various relative humidity conditions and four different injected concentrations for each compound. The isothermal adsorption curves at low concentration levels were obtained and they were well described by Langmuir isotherm model. It was noticed that there were significant differences between the adsorption behaviors and photocatalytic activities of TiO_2/FGFs and TiO_2/CCFs. It was concluded that adsorption performance is closely related to the characteristics of substrates and therefore, the development of a substrate with high adsorption ability is a promising trend for improving the performance of the UV-PCO technology.
机译：数十年来，已经研究了光催化氧化（PCO）技术作为空气净化的替代方法，并且各种PCO模型表明，反应物在催化剂表面的吸附是异质光催化反应中发生的主要物理和化学过程之一。 。然而，有限的研究探索了光催化剂的吸附作用。这项研究系统地评估了二氧化钛（TiO_2）涂覆的玻璃纤维（FGFs），二氧化钛（TiO_2）涂覆的碳布纤维（CCFs）和原始CCF空气过滤器在9种挥发性有机化合物的各种相对湿度条件下的吸附性能。用SEM表征了TiCh / FGFs，TiO_2 / CCFs和CCFs的形貌，并用BET表面积和孔结构表征了N_2吸附等温线。构建了台式吸附测试装置，并在各种相对湿度条件下对每种化合物进行了四种不同的注入浓度下的吸附测试。获得了低浓度下的等温吸附曲线，并用Langmuir等温模型很好地描述了它们。注意到TiO_2 / FGFs和TiO_2 / CCFs的吸附行为和光催化活性之间存在显着差异。可以得出结论，吸附性能与基材的特性密切相关，因此，开发具有高吸附能力的基材是提高UV-PCO技术性能的有希望的趋势。

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  • 来源
    《Journal of Hazardous Materials》 |2012年第12期|340-349|共10页
  • 作者

    Lexuan Zhong; Chang-Seo Lee; Fariborz Haghighat;

  • 作者单位

    Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, Quebec H3G IMS, Canada;

    Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, Quebec H3G IMS, Canada;

    Department of Building, Civil and Environmental Engineering, Concordia University, Montreal, Quebec H3G IMS, Canada;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    filters; titanium dioxide (TiO_2); adsorption; relative humidity (RH); photocatalytic reaction;

    机译：过滤器二氧化钛（TiO_2）;吸附相对湿度（RH）;光催化反应;

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