Degradable and Recyclable Solar Desalination Membranes Based on Naturally Occurring Building Blocks,Chemistry of Materials

当前位置： X-MOL 学术 › Chem. Mater. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Degradable and Recyclable Solar Desalination Membranes Based on Naturally Occurring Building Blocks
Chemistry of Materials ( IF 7.2 ) Pub Date : 2022-11-20 , DOI: 10.1021/acs.chemmater.2c02230
Ning Li ₁ , Yuan Zou ₁ , Xueqian Zhang ₁ , Zhekai Jin ₁ , Yi Yang ₁ , Lu Yang ₁ , Gaigai Duan ₂ , Yuanting Xu ₁ , Yiwen Li ₁

Affiliation

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.

中文翻译：

基于天然生成块的可降解和可回收太阳能海水淡化膜

太阳能蒸汽发电是获取淡水和缓解缺水问题的一种稳健且环保的方式。尽管各种各样的蒸汽发生装置已被详细记录，但大多数制造的材料通常仅适用于一种装置并且通常难以移除，从而导致成为一次性装置。这可能会引起对总成本问题的严重担忧，特别是对于那些具有复杂且精心定制的微结构的设备。因此，迫切需要开发一种坚固且动态的光热涂层，该涂层可以轻松移除并在不同装置之间灵活切换，具有稳定的光热转换能力。在这项工作中，我们报告了一种可降解和可回收的基于金属酚醛网络的光热涂层，该涂层由两种天然存在的结构单元 [没食子酸 (GA) 和 Fe(III)] 组装而成。选择亲水性聚（偏二氟乙烯）（PVDF）作为底物，得到坚固的 GA@Fe（III）@PVDF 膜，可实现 1.539 kg m 的高蒸发率^–2 h ^–1，在 1 太阳光照下，蒸汽产生效率高达 90.2%。令人印象深刻的是，GA@Fe(III) 涂层可以在酸性条件下迅速降解，回收的 PVDF 可以再次被 GA@Fe(III) 网络重新涂覆。回收的 GA@Fe(III)@PVDF 的蒸汽产生性能可以在 150 次降解和重涂循环中保持稳定。我们相信这项工作可以为制造用于太阳能蒸汽发电的低成本、可持续和可降解的光热涂层提供机会。

更新日期：2022-11-20

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11