Tuning on passive interfacial cooling of covalent organic framework hydrogel for enhancing freshwater and electricity generation

IF 18.7 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY SusMat Pub Date : 2024-07-17 DOI:10.1002/sus2.231

Jianfei Wu, Ziwei Cui, Yuxuan Su, Dongfang Wu, Jundie Hu, J. Qu, Jianzhang Li, Fangyuan Kang, Dan Tian, Qichun Zhang, Yahui Cai

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Abstract

Developing an efficient freshwater and electricity co‐generation device (FECGD) can solve the shortage of freshwater and electricity. However, the poor salt resistance and refrigeration properties of the materials for FECGD put big challenges in the efficient and stable operation of these devices. To address these issues, we propose the covalent organic framework (COF) confined co‐polymerization strategy to prepare COF‐modified acrylamide cationic hydrogels (ACH‐COF), where hydrogen bonding interlocking between negatively charged polymer chains and COF pores can form a salt resistant hydrogel for stabilizing tunable passive interfacial cooling (TPIC). The FECPDs based on the TPIC and salt resistance of ACH‐COF display a maximum output power density of 2.28 W m−2, which is 4.3 times higher than that of a commercial thermoelectric generator under one solar radiation. The production rate of freshwater can reach 2.74 kg m−2 h−1. Our results suggest that the high efficiency and scalability of the FECGD can hold the promise of alleviating freshwater and power shortages.

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调节共价有机框架水凝胶的被动界面冷却以提高淡水和发电能力

开发高效的淡水和电力联合发电装置（FECGD）可以解决淡水和电力短缺问题。然而，FECGD 材料的耐盐性和制冷性能较差，给这些装置的高效稳定运行带来了巨大挑战。为了解决这些问题，我们提出了共价有机框架（COF）限制共聚策略来制备 COF 改性丙烯酰胺阳离子水凝胶（ACH-COF），带负电荷的聚合物链与 COF 孔之间的氢键互锁可形成耐盐性水凝胶，从而稳定可调被动界面冷却（TPIC）。基于 ACH-COF 的 TPIC 和耐盐性能的 FECPD 显示出 2.28 W m-2 的最大输出功率密度，在一个太阳辐射条件下是商用热电发电机的 4.3 倍。淡水生产率可达 2.74 kg m-2 h-1。我们的研究结果表明，FECGD 的高效率和可扩展性有望缓解淡水和电力短缺问题。

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来源期刊

SusMat

自引率

4.20%

发文量

期刊介绍： SusMat aims to publish interdisciplinary and balanced research on sustainable development in various areas including materials science, engineering, chemistry, physics, and ecology. The journal focuses on sustainable materials and their impact on energy and the environment. The topics covered include environment-friendly materials, green catalysis, clean energy, and waste treatment and management. The readership includes materials scientists, engineers, chemists, physicists, energy and environment researchers, and policy makers. The journal is indexed in CAS, Current Contents, DOAJ, Science Citation Index Expanded, and Web of Science. The journal highly values innovative multidisciplinary research with wide impact.