Christogerou Angeliki, Koumpouri Dimitra, Angelopoulos George N
Department of Chemical Engineering, University of Patras, Caratheodori 1, 26504 Patras, Greece.
INVALOR: Research Infrastructure for Waste Valorization and Sustainable Management, Caratheodory 1, University Campus, 26504 Patras, Greece.
Materials (Basel). 2020 Jan 30;13(3):620. doi: 10.3390/ma13030620.
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.
开发具有光催化性能的新型环保建筑材料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加剧和温室气体排放，这些对公众健康和建筑物都有负面影响。用二氧化钛功能化的陶瓷屋面瓦可以通过改善其性能来帮助解决这些严峻的环境问题。在本研究中，由粘土体混合物和拜耳法铝土矿残渣（铁铝氧石）制成的重粘土陶瓷用作沉积二氧化钛涂层的基材，以生产自清洁陶瓷表面。该过程基于四氯化钛在常压条件下于化学气相沉积（CVD）反应器中发生的热水解反应。所有涂层样品均在600℃下退火，并通过X射线衍射（XRD）、扫描电子显微镜/能谱（SEM/EDS）以及有机污染物降解能力进行表征。二氧化钛混合相（金红石和钙钛矿）的形成在样品的光催化活性方面显示出积极的结果。与效率较低的参比样品相比，含有铁铝氧石的样品在4小时后将靛蓝胭脂红溶液100%分解。最后，本文在循环经济和环境可持续性的概念范围内探讨了生产光催化活性陶瓷的技术可行解决方案。
