CaCl2@MOF-808原位复合成型颗粒的制备及其集水性能
Preparation and water adsorption properties of CaCl2@MOF-808 in-situ composite moulded particles
作者单位E-mail
亢紫亮 太原理工大学化学与化工学院, 气体能源高效清洁利用山西省重点实验室, 太原 030024  
张佳敏 太原理工大学化学与化工学院, 气体能源高效清洁利用山西省重点实验室, 太原 030024  
安虹 太原理工大学化学与化工学院, 气体能源高效清洁利用山西省重点实验室, 太原 030024  
刘小华 太原理工大学化学与化工学院, 气体能源高效清洁利用山西省重点实验室, 太原 030024  
陈杨 太原理工大学化学与化工学院, 气体能源高效清洁利用山西省重点实验室, 太原 030024 chenyangtyut@163.com 
李晋平 太原理工大学化学与化工学院, 气体能源高效清洁利用山西省重点实验室, 太原 030024  
李立博 太原理工大学化学与化工学院, 气体能源高效清洁利用山西省重点实验室, 太原 030024  
摘要: 将吸湿盐与金属有机骨架(MOF)材料结合,采用原位改性成型方法快速制备吸湿盐负载的CaCl2@MOF-808复合成型颗粒。基于MOF-808的高孔隙率和高比表面积,CaCl2可分散在MOF-808的孔道内,水分子在丰富孔隙环境和吸湿盐的共同作用下被吸附,提升了该成型颗粒在低压下的集水能力。通过X射线粉末衍射、扫描电镜、N2吸附-脱附和吸水测试等表征技术观察成型颗粒的物相及性能,结果表明CaCl2@MOF-808成型吸附剂机械强度达25 N,满足应用的抗压水平,同时在25℃和相对湿度(RH)30%下其吸水率达到最大值0.43 g·g-1,是原始MOF-808的5倍,具有良好的吸水能力。
关键词: CaCl2  MOF-808  原位复合  集水
基金项目: 国家自然科学基金(No.22278288,22278287)和山西省基础研究计划项目(No.202203021224005)资助。
Abstract: The combination of hygroscopic salt with metal-organic framework (MOF) material and in-situ modified moulding method can be used to rapidly prepare hygroscopic salt-loaded CaCl2@MOF-808 composite moulded particles. Based on the high porosity and high specific surface area of MOF-808, CaCl2 could be dispersed in the pore channels of MOF-808, and water molecules were adsorbed under the joint action of the rich pore environment and the hygroscopic salt, which enhances the water harvesting ability of the molded particles under low pressure. Characterization techniques such as X-ray powder diffraction, scanning electron microscopy, N2 adsorption-desorption, and water adsorption tests were used to observe the physical phase and properties of the formed particles. The test results showed that the mechanical strength of CaCl2@MOF-808 molded adsorbent reached 25 N, which meets the compressive level of the application. At a temperature of 25 ℃ and a relative humidity (RH) of 30%, the maximum value of its water adsorption rate was 0.43 g·g-1, which was five times higher than that of the original MOF-808.
Keywords: CaCl2  MOF-808  in-situ composite  water adsorption
投稿时间:2024-07-25 修订日期:2024-10-09
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亢紫亮,张佳敏,安虹,刘小华,陈杨,李晋平,李立博.CaCl2@MOF-808原位复合成型颗粒的制备及其集水性能[J].无机化学学报,2024,40(11):2133-2140.
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