Engineering of Defective MOF-801 Nanostructures within Macroporous Spheres for Highly Efficient and Stable Water Harvesting,Advanced Materials

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Engineering of Defective MOF-801 Nanostructures within Macroporous Spheres for Highly Efficient and Stable Water Harvesting
Advanced Materials ( IF 27.4 ) Pub Date : 2023-05-23 , DOI: 10.1002/adma.202210235
Chuanruo Yang ₁ , Hao Wu ₁ , Jimmy Yun ₂ , Junsu Jin ₁ , Hong Meng ₃ , Jürgen Caro ₄ , Jianguo Mi ₁

Affiliation

Water harvesting using the metal-organic framework (MOF)-801 is restricted by limited working capacity, powder structuring, and finite stability. To overcome these issues, MOF-801 is crystallized on the surface of macroporous poly(N-isopropylacrylamide-glycidyl methacrylate) spheres, called P(NIPAM-GMA), through an in situ confined growth strategy, forming spherical MOF-801@P(NIPAM-GMA) composite with temperature-responsive function. By lowering the nucleation energy barrier, the average size of the MOF-801 crystals decreases by 20 times. Thus, abundant defects as adsorption sites for water can be installed in the crystals lattices. As a consequence, the composite provides an unprecedented high water harvesting efficiency. The composite is produced in the kilogram-scale and can capture 1.60 kg H₂O/kg composite/day from 20% relative humidity between 25 and 85 °C. This study provides an effective methodology for improving the adsorption capacity through controlled defects formation as adsorption sites and to improve the kinetics through the design of a composite with macroporous transport channel network.

中文翻译：

大孔球内有缺陷的 MOF-801 纳米结构工程，用于高效、稳定的集水

使用金属有机框架 (MOF)-801 进行水收集受到有限的工作能力、粉末结构和有限的稳定性的限制。为了克服这些问题，MOF -801通过原位限域生长策略在大孔聚（ N-异丙基丙烯酰胺-甲基丙烯酸缩水甘油酯）球体（称为P（NIPAM-GMA））表面结晶，形成球形MOF-801@P（ NIPAM-GMA）具有温度响应功能的复合材料。通过降低成核能垒，MOF-801晶体的平均尺寸减小了20倍。因此，可以在晶格中安装丰富的缺陷作为水的吸附位点。因此，该复合材料提供了前所未有的高集水效率。该复合材料以公斤级生产，在 25 至 85 °C 的相对湿度为 20% 的条件下，每天可捕获 1.60 kg H _{2 O/kg 复合材料。}这项研究提供了一种有效的方法，通过控制缺陷形成作为吸附位点来提高吸附能力，并通过设计具有大孔传输通道网络的复合材料来提高动力学。

更新日期：2023-05-23

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