Li Ruiqi, Zhou Changqing, Yang Lixue, Li Junqing, Zhang Guoli, Tian Jiaxiang, Wu Wencong
Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, Harbin Engineering University, Harbin 150001, China.
Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education, Harbin Engineering University, Harbin 150001, China.
J Hazard Mater. 2022 Feb 15;424(Pt C):127367. doi: 10.1016/j.jhazmat.2021.127367. Epub 2021 Sep 29.
Water evaporation using photothermal materials is a cost-effective and sustainable technology for alleviating the world's freshwater crisis, but oil contaminants and organic pollutants exist in the original water sources, which severely degrade the evaporation performance and pose environmental hazards. In this paper, we demonstrate a photothermal material (multifunctional cotton) that simultaneously demonstrates oil-resistance, organic pollutant removal, and a high water evaporation rate. A Schottky heterostructure was formed between polyaniline (PANI) and Ag NPs, which improved the photothermal conversion and achieved a water evaporation rate of 1.37 kg m h and photothermal conversion efficiency of 84.7% under one-sun illumination (1 kW m). Notably, various organic pollutants in the water source were thoroughly removed by visible-light catalytic degradation and adsorption, which displayed efficiencies of 99.3% and 97%, respectively. The multifunctional cotton also possessed excellent superoleophobicity, and repelled oil contaminants and organic pollutants in water. Considering these merits, the as-prepared multifunctional cotton is an outstanding candidate for water evaporation from various sources.
利用光热材料进行水蒸发是一种经济高效且可持续的技术，可缓解全球淡水危机，但原水源中存在油类污染物和有机污染物，这会严重降低蒸发性能并造成环境危害。在本文中，我们展示了一种光热材料（多功能棉），它同时具备耐油、去除有机污染物和高水蒸发速率的特性。聚苯胺（PANI）和银纳米颗粒（Ag NPs）之间形成了肖特基异质结构，这提高了光热转换效率，在一个太阳光照（1 kW·m²）下实现了1.37 kg·m⁻²·h⁻¹的水蒸发速率和84.7%的光热转换效率。值得注意的是，通过可见光催化降解和吸附，水源中的各种有机污染物被彻底去除，去除效率分别为99.3%和97%。这种多功能棉还具有优异的超疏油性，能排斥水中的油类污染物和有机污染物。鉴于这些优点，所制备的多功能棉是用于各种水源水蒸发的优秀候选材料。
