Sun Hanxue, Li Yuanzhen, Li Jiyan, Zhu Zhaoqi, Zhang Wanting, Liang Weidong, Ma Chonghua, Li An
Department of Chemical Engineering, College of Petrochemical Engineering, Lanzhou University of Technology, Lanzhou 730050, P. R. China.
ACS Appl Mater Interfaces. 2021 Jul 21;13(28):33427-33436. doi: 10.1021/acsami.1c06226. Epub 2021 Jul 8.
Solar-driven interfacial water evaporation is one promising technology for seawater desalination and sewage purification because it offers a feasible and sustainable strategy to relieve global water scarcity. Herein, a novel hybrid film composed of recycled carbon soot and poly(vinyl alcohol) is developed by a very simple, green, and highly scalable "salt-assisted" assembling method. The hybrid film possesses characteristics with a porous structure, superhydrophilicity, ∼100% light absorption, and low thermal conductivity, which can effectively convert light into heat under solar illumination. Consequently, the hybrid film can achieve a photothermal conversion efficiency of 91.5% under a stimulated solar irradiation of 1 kW m. Furthermore, the hybrid film can be applied for seawater desalination and dye wastewater purification. The findings of our work not only provide a new photothermal platform with high light-to-thermal conversion ability and good reusability but also open a new avenue for the applications of carbon soot-based hybrid films in solar-assisted water evaporation and sewage purification.
太阳能驱动的界面水蒸发是一种很有前景的海水淡化和污水净化技术，因为它为缓解全球水资源短缺提供了一种可行且可持续的策略。在此，通过一种非常简单、绿色且具有高度可扩展性的“盐辅助”组装方法，制备了一种由回收碳烟和聚乙烯醇组成的新型混合膜。该混合膜具有多孔结构、超亲水性、约100%的光吸收和低导热率等特性，在太阳光照射下能有效地将光转化为热。因此，在1 kW m的模拟太阳辐照下，该混合膜可实现91.5%的光热转换效率。此外，该混合膜可用于海水淡化和染料废水净化。我们的研究结果不仅提供了一个具有高光热转换能力和良好可重复使用性的新型光热平台，还为基于碳烟的混合膜在太阳能辅助水蒸发和污水净化中的应用开辟了一条新途径。
