MIL-96(Al)及其复合吸附剂的合成及水吸附性能研究
Synthesis and water adsorption properties of MIL-96(Al)and its composite adsorbents
奚之皓 1赵惠忠 1王清戈 1苗春勃 1刘成凤1
作者信息
- 1. 上海海事大学商船学院,上海 201306
- 折叠
摘要
通过溶剂热合成法制备了铝基金属有机骨架材料MIL-96(Al),并通过浸渍法合成了复合吸附剂MIL-96(Al)-L.通过扫描电子显微镜(SEM)讨论了所制备吸附剂的形貌.在不同工况的吸附实验中,MIL-96(Al)具有稳定的平衡吸附量,吸湿盐LiCl的加入增强了复合吸附剂的吸水性能.在吸附速率方面,MIL-96(Al)及其复合吸附剂表现出优异的性能.在不同温度和湿度条件下,MIL-96(Al)的吸附速率相对稳定,最高可达0.172 g/(g·h),而在相同条件下,MIL-96(Al)-L3的吸附速率最高可达MIL-96(Al)的3.7倍.MIL-96(Al)及其复合吸附剂在110 ℃下,可在30 min内完成脱附.其循环稳定性也通过循环再生实验得到证实.结果表明,MIL-96(Al)-L复合吸附剂是一种可实际应用于干旱地区的太阳能空气取水吸附剂.
Abstract
The aluminum-based metal-organic framework material MIL-96(Al)was prepared by solvother-mal synthesis,and the composite adsorbent MIL-96(Al)-L was prepared by impregnation for the first time.The morphology of the prepared adsorbents was showed by scanning electron microscopy(SEM).In the adsorption experiments under different working conditions,MIL-96(Al)had a stable equilibrium adsorption capacity,and the addition of hygroscopic salt LiCl enhanced the water absorption properties of the composite adsorbents.In terms of adsorption rate,MIL-96(Al)and its composite adsorbents showed excellent performance.The adsorption rate of MIL-96(Al)was relatively stable at different temperature and humidity conditions,up to 0.172 g/(g·h),while the adsorption rate of MIL-96(Al)-L3 was up to 3.7 times that of MIL-96(Al)at the same conditions.MIL-96(Al)and its composite adsorbents could be desorbed within 30 min at 110 ℃.Its hydrothermal stability was also confirmed by cyclic regeneration experiments.The results indicate that MIL-96(Al)-L composite adsorbent is a kind of adsorbent which may be applied in atmospheric water harvesting for arid areas.
关键词
金属有机骨架/太阳能空气取水/复合吸附剂/开式吸附Key words
metal-organic frameworks/solar-driven atmospheric water harvesting/composite adsorbent/open adsorption performance引用本文复制引用
基金项目
国家自然科学基金面上项目(50976073)
出版年
2024
NETL
NSTL
万方数据