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Solar water purification with photocatalytic nanocomposite filter based on TiO2 nanowires and carbon nanotubes
npj Clean Water ( IF 11.4 ) Pub Date : 2022-04-07 , DOI: 10.1038/s41545-022-00157-2
E. Horváth , J. Gabathuler , G. Bourdiec , E. Vidal-Revel , M. Benthem Muñiz , M. Gaal , D. Grandjean , F. Breider , L. Rossi , A. Sienkiewicz , L. Forró

Water contamination due to environmental conditions and poor waste management in certain areas of the world represents a serious problem in accessing clean and safe drinking water. This problem is especially critical in electricity-poor regions, where advanced water purification methods are absent. Here, we demonstrate that titanium dioxide nanowires (TiO2NWs)-based photocatalytic filters assisted only with sunlight can efficiently decontaminate water. Moreover, interweaving TiO2NWs with carbon nanotubes (CNTs) leads to the formation of a TiO2NWs/CNTs composite material and offers an additional water decontamination channel, that is of pasteurization with the visible part of the solar emission spectrum. Our results demonstrate that this nanoporous filter can successfully intercept various types of microbial pathogens, including bacteria and large viruses. In addition, photo-catalytically generated reactive oxygen species (ROS) on the surface of the TiO2NWs/CNTs-based filter material under exposure to sunlight contribute to an efficient removal of a broad range of organic compounds and infective microbes. A pilot study also yielded encouraging results in reducing traces of drugs and pesticides in drinking water.



中文翻译:

基于 TiO2 纳米线和碳纳米管的光催化纳米复合过滤器净化太阳能水

在世界某些地区,由于环境条件和废物管理不善造成的水污染是获取清洁和安全饮用水的严重问题。这个问题在缺乏先进水净化方法的电力匮乏地区尤为严重。在这里,我们证明了仅在阳光下辅助的基于二氧化钛纳米线 (TiO 2 NWs) 的光催化过滤器可以有效地净化水。此外,将 TiO 2纳米线与碳纳米管 (CNT)交织会导致形成 TiO 2NWs/CNTs 复合材料并提供额外的水净化通道,即对太阳发射光谱的可见部分进行巴氏杀菌。我们的研究结果表明,这种纳米多孔过滤器可以成功拦截各种类型的微生物病原体,包括细菌和大型病毒。此外,暴露于阳光下,基于 TiO 2 NWs/CNTs 的过滤材料表面上的光催化产生的活性氧 (ROS)有助于有效去除多种有机化合物和感染性微生物。一项试点研究在减少饮用水中的药物和杀虫剂痕迹方面也取得了令人鼓舞的结果。

更新日期:2022-04-07
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