海水淡化
膜
涂层
光热治疗
环境友好型
基质(水族馆)
材料科学
纳米技术
经济短缺
化学工程
工艺工程
工程类
化学
生物化学
生态学
海洋学
语言学
哲学
政府(语言学)
地质学
生物
作者
Ning Li,Yuan Zou,Xueqian Zhang,Zhekai Jin,Yi Yang,Yang Lu,Gaigai Duan,Yuanting Xu,Yiwen Li
标识
DOI:10.1021/acs.chemmater.2c02230
摘要
Solar steam generation is a robust and environmentally friendly way to obtain fresh water and alleviate the water shortage problem. Although a wide variety of steam generation devices have been well documented, most fabricated materials are often only suitable for one device and generally difficult to be removed, resulting in a disposable device. This may raise serious concerns about the total cost issues, particularly for those devices with complex and well-tailored microstructures. Thus, it is urgent to develop a robust and dynamic photothermal coating that can be easily removed and flexibly switched between different installations with stable photothermal conversion ability. In this work, we report a degradable and recyclable metal-phenolic network-based photothermal coating assembled from two kinds of naturally occurring building blocks [gallic acid (GA) and Fe(III)]. Hydrophilic poly(vinylidene fluoride) (PVDF) was selected as the substrate, resulting in the robust GA@Fe(III)@PVDF membrane, which can achieve a high evaporation rate of 1.539 kg m–2 h–1 and a superb steam generation efficiency of 90.2% under 1 sun illumination. Impressively, the GA@Fe(III) coating can be degraded under acidic condition rapidly, and the recovered PVDF can be recoated by the GA@Fe(III) networks again. The steam generation performance of the recovered GA@Fe(III)@PVDF can remain stable over 150 degrading and recoating cycles. We believed that this work could offer opportunities to fabricate low-cost, sustainable, and degradable photothermal coatings for solar steam generation.
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