CaCl_(2)@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 CaCl_(2)@MOF‑808 in‑situ composite moulded particles

作　　者：亢紫亮 张佳敏 安虹 刘小华 陈杨[1] 李晋平[1] 李立博[1] KANG Ziliang;ZHANG Jiamin;AN Hong;LIU Xiaohua;CHEN Yang;LI Jinping;LI Libo(Shanxi Key Laboratory of Gas Energy Efficient and Clean Utilization,College of Chemistry and Chemical Engineering,Taiyuan University of Technology,Taiyuan 030024,China)

机构地区：[1]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

出　　处：《无机化学学报》2024年第11期2133-2140,共8页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.22278288,22278287);山西省基础研究计划项目(No.202203021224005)资助。

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CaCl_(2)@MOF-808复合成型颗粒。基于MOF-808的高孔隙率和高比表面积,CaCl_(2)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CaCl_(2)@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。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 CaCl_(2)@MOF-808 composite moulded parti-cles.Based on the high porosity and high specific surface area of MOF-808,CaCl_(2) 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.Char-acterization 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 CaCl_(2)@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.

关 键 词：CaCl_(2) MOF-808 原位复合 集水 

分 类 号：O614.61[理学—无机化学]