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首页> 美国卫生研究院文献>Materials >Development of Photocatalytic Coatings by Thermal Hydrolysis of TiCl4 on Ceramic Roofing Tiles Made from Ferroalumina and Evaluation of De-Pollution Properties
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Development of Photocatalytic Coatings by Thermal Hydrolysis of TiCl4 on Ceramic Roofing Tiles Made from Ferroalumina and Evaluation of De-Pollution Properties

机译：四氧化三铁热水解TiAl4在铁铝陶瓷瓦上光催化涂层的开发及脱污染性能的评价

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The development of new, environmental friendly building materials with photocatalytic properties remain still on the top of the investigations both for academy and industry. The main drive is the increasing air pollution and the greenhouse gas emissions that have negative effect on public health and buildings. Ceramic roofing tiles functionalized with TiO can contribute on tackling these severe environmental problems by improving their properties. In this study, heavy clay ceramics manufactured from clay-body mixture and a Bayer process bauxite residue (ferroalumina) are used as substrates for the deposition of TiO coatings in order to produce self-cleaning ceramic surfaces. The process is based on the thermal hydrolysis of TiCl which takes place in a CVD reactor under atmospheric conditions. All coated samples were annealed at 600 °C and characterized in means of XRD, SEM/EDS and degradation ability of an organic pollutant. The formation of titania mixed phases (rutile and perovskite) shows positive results regarding the photocatalytic activity of the samples. The ones containing ferroalumina decomposed 100% the indigo carmine solution after 4 h, in comparison with the reference one which presented lower efficiency. Finally, this paper addresses technical feasible solutions for the production of photocatalytic active ceramics within the concept of circular economy and environmental sustainability.
机译：具有光催化性能的新型环保建筑材料的开发仍然是学术界和工业界研究的重中之重。主要驱动力是空气污染和温室气体排放量的增加，这对公共卫生和建筑物产生负面影响。 TiO功能化的陶瓷屋面瓦可以通过改善其性能来解决这些严重的环境问题。在这项研究中，由粘土体混合物和拜耳法铝土矿残留物（铁铝矾土）制成的重质粘土陶瓷被用作沉积TiO涂层的基质，以产生自清洁的陶瓷表面。该方法基于TiCl的热水解，该热水解在大气条件下在CVD反应器中进行。所有涂层样品均在600°C下退火，并通过XRD，SEM / EDS和有机污染物的降解能力进行表征。二氧化钛混合相（金红石和钙钛矿）的形成显示出有关样品的光催化活性的积极结果。与参比品相比，含铁氧化铝的品在4 h后分解了100％的靛蓝胭脂红溶液。最后，本文探讨了在循环经济和环境可持续性概念下生产光催化活性陶瓷的技术可行方案。

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