摘要
为了从大气中高效收集水蒸气,采用简单绿色的水热法制备具有高稳定性的铝基金属-有机框架材料(MOF)ZJU-210.采用粉末X射线衍射技术进行晶体结构分析,利用同步热分析仪测试样品的稳定性和吸附-脱附动力学,利用气体与蒸汽吸附仪分析样品的孔结构和水吸附性能.分析结果显示,ZJU-210延c轴形成一维方孔道,孔道直径约为0.58 nm. ZJU-210的孔道内拥有丰富的氮位点和氧位点,增强了材料孔道的亲水性,使ZJU-210在20%相对湿度下(25℃)水质量分数高达40%,能够在极短的时间内完成吸附-脱附循环. ZJU-210具有良好的稳定性,经历1 000次水吸附-脱附循环后能够保持初始的吸水性能.室外实验证明ZJU-210能通过太阳光完成快速脱附.与传统干燥剂(如硅胶、沸石和吸湿盐)相比,ZJU-210具有许多优点,有望成为新一代大气集水材料.
A simple and green hydrothermal method was used to prepare an aluminum-based metal-organic framework(MOF) ZJU-210 with high stability in order to efficiently collect water from the atmosphere. The powder X-ray diffraction was used to analyze the crystal structure, and the thermogravimetric analyzer was used to test the stability and adsorption-desorption kinetics. The gas and vapor adsorption analyzer was used to analyze the pore structure and water adsorption performance. The analysis results show that ZJU-210 has a one-dimensional square channel along the c axis with a pore size of about 0.58 nm. The channel has abundant nitrogen and oxygen sites,which greatly enhances the hydrophilicity of channel. Water mass fraction reached 40% at a relative humidity of20%(25 ℃) and a fast adsorption-desorption cycle was achieved. ZJU-210 is reusable and can still maintain its initial water adsorption performance after 1 000 water adsorption-desorption cycles. Out-door experiment shows the fast water release powered by natural sunlight. ZJU-210 was testified to have many advantages compared with classic desiccants(such as silica gel, zeolite, and hygroscopic salts), providing a promising strategy for developing next-generation hydrophilic material for atmosphere water harvesting.
作者
武恩宇
钱国栋
李斌
WU En-yu;QIAN Guo-dong;LI Bin(School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China)
出处
《浙江大学学报（工学版）》
EI
CAS
CSCD
北大核心
2022年第1期186-192,共7页
Journal of Zhejiang University：Engineering Science
基金
国家自然科学基金资助项目(51803179)。
关键词
多孔材料
金属-有机框架材料
大气集水
水稳定性
等温水吸附曲线
porous material
metal-organic framework
atmospheric water harvesting
hydrolytic stability
water adsorption isotherm
