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首页> 外文期刊>Building and Environment >Titanium dioxide coated cementitious materials for air purifying purposes: Preparation, characterization and toluene removal potential
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Titanium dioxide coated cementitious materials for air purifying purposes: Preparation, characterization and toluene removal potential

机译：用于空气净化的二氧化钛涂层水泥材料：制备，表征和脱甲苯的潜力

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摘要

This work presents promising results for air purification by heterogeneous photocatalysis on new titanium dioxide loaded cementitious materials. A set of eight concretes and plasters is enriched with TiO_2 photocatalyst by dip-coating and/or sol-gel methods.rnFirst, the macro-structural features of the cementitious materials have been studied in terms of porosity and roughness. The first parameter has been determined using mercury intrusion porosimetry or by vacuum saturation, and ranged between 9 and 75%, with the highest values obtained for autoclaved aerated white concrete. Surface roughness, determined by laser profilometry, has been characterized by the R_a factor. This expresses the mean deviation of the profile from the centre line and ranged between 0.7 and 252 urn, with the highest value obtained for conventional grey concrete finished with surface brush.rnSecondly, the weathering resistance of the TiO_2 coatings has been determined by exposing them to different abrasive conditions and by performing SEM-Edax analyses to measure quantitatively the coating's titanium content. Hereby, it is shown that high porosity and roughness are favourable for TiO_2 particles retention.rnFinally, the preliminary air purification potential of both dip-coated and sol-gel coated TiO_2 enriched concrete samples has been investigated on lab-scale using toluene as a model pollutant. High removal efficiencies (up to 86%) were obtained with the dip-coated samples, indicating their attractive photo-catalytic properties for future application as air purifying building materials.
机译：这项工作为通过负载新型二氧化钛的胶凝材料进行非均相光催化净化空气提供了令人鼓舞的结果。通过浸涂和/或溶胶-凝胶法将八种混凝土和灰泥用TiO_2光催化剂富集。首先，从孔隙率和粗糙度的角度研究了胶凝材料的宏观结构特征。第一个参数是使用压汞法或通过真空饱和度测定的，范围在9％到75％之间，其中高压灭菌加气的白色混凝土获得了最高值。通过激光轮廓仪确定的表面粗糙度已通过R_a因子进行了表征。这表示轮廓与中心线的平均偏差在0.7至252 um之间，这是使用表面刷涂完成的常规灰色混凝土所获得的最高值。第二，通过将TiO_2涂层暴露在环境中来确定其耐候性不同的研磨条件并通过执行SEM-Edax分析来定量测量涂层的钛含量。结果表明，高孔隙率和粗糙度有利于TiO_2颗粒的保留。最后，以甲苯为模型，在实验室规模下研究了浸涂和溶胶-凝胶涂覆的TiO_2富集混凝土样品的初步空气净化潜力。污染物。浸涂样品获得了很高的去除效率（高达86％），表明它们具有诱人的光催化性能，可作为未来的空气净化建筑材料。

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  • 来源
    《Building and Environment》 |2010年第4期|832-838|共7页
  • 作者

    Anibal Maury Ramirez; Kristof Demeestere; Nele De Belie; Tapio Maentylae; Erkki Levaenen;

  • 作者单位

    Magnel Laboratory for Concrete Research, Department of Structural Engineering, Engineering Faculty, Ghent University, Technologiepark Zwijnaarde 904, B-9052 Ghent, Belgium;

    Research Group EnVOC, Department of Organic Chemistry, Faculty of Bioscience Engineering. Ghent University, Coupure Links 653. B-9000 Ghent. Belgium;

    Magnel Laboratory for Concrete Research, Department of Structural Engineering, Engineering Faculty, Ghent University, Technologiepark Zwijnaarde 904, B-9052 Ghent, Belgium;

    Department of Materials Science, Tampere University of Technology, Korkeakoulunkatu 6. FIN-33720 Tampere, Finland;

    Department of Materials Science, Tampere University of Technology, Korkeakoulunkatu 6. FIN-33720 Tampere, Finland;

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  • 正文语种 eng
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  • 关键词

    heterogeneous photocatalysis; titanium dioxide; cementitious materials; toluene; volatile organic compounds; air purification;

    机译：非均相光催化二氧化钛;水泥材料;甲苯;挥发性有机化合物;空气净化;

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