低蒸发热量离子共价有机框架,用于在低湿度下有效地收集大气中的水
Zheng Shi1, Yu Guo1, Xiuyang Zou2
1Jiangsu Engineering Laboratory of Novel Functional Polymeric Materials, Jiangsu Key Laboratory of Advanced Negative Carbon Technologies, Suzhou Key Laboratory of Soft Material and New Energy, College of Chemistry, Chemical Engineering and Materials Science, Soochow University, Suzhou, 215123, P. R. China.
新的离子共价有机框架 (iCOF) 在低湿度 (<25%) 时有效地收集水蒸气. TB-COF-Li显示了高吸附率和快速,低能量的水释放,用于大气水收集.
科学领域:
- 材料科学 材料科学 材料科学
- 化学 化学 化学
- 环境科学 环境科学
背景情况:
- 大气中的水收集对干旱地区至关重要.
- 低相对湿度 (<25%) 给收集水带来了挑战.
- 现有的材料往往需要高能量来进行水溶解.
研究的目的:
- 开发新的离子共价有机框架 (iCOFs) 以在相对湿度低的情况下有效收集水.
- 为了研究高度盐酸和离子度对水吸附和脱附的作用.
- 评估iCOFs在大气水收集装置中的性能.
主要方法:
- 一系列iCOFs的合成,其中含有不同的湿度可观盐酸.
- 描述iCOF的特性,包括水吸附/溶解等热度和稳定性.
- 在模拟的太阳辐射下评估水脱吸动力学.
- 使用iCOFs制造和测试一个大气水收集装置.
主要成果:
- 开发了具有高水友性和水稳定性的iCOFs,用于高效的水蒸气吸附率低于25%RH.
- 结核-COF-Li表现出了0.24g/g的显著吸附能力,从0-22%的RH.
- 与散装水 (2387.4 J/g) 相比,TB-COF-Li的蒸发度 (967.04 J/g) 显著降低.
- 在60°C使用1.5太阳能强度实现了快速的水脱落,其水收集率为0.092g/g/h.
结论:
- 离子共价有机框架是收集大气水的有效材料,特别是在相对湿度低的情况下.
- 可调节的离子结构允许管理水的状态和节能吸附.
- 这些iCOF为干旱环境中的淡水发电提供了有希望的,具有成本效益的解决方案.
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