L-谷氨酸修饰金属有机框架材料MIL-101对CO2的吸附
Adsorption of CO2 by L-glutamic acid-modified metal organic framework material MIL-101
陈波 1姜宁 1程建 1唐毅 1祝玉林 1余晓鹏1
作者信息
- 1. 四川轻化工大学 化学工程学院,四川 自贡 643000
- 折叠
摘要
利用L-谷氨酸(L-Glu)作为第二配体一锅合成了MIL-101-xGlu,采用XRD、N2 吸附-脱附、SEM及TG等方法进行了表征,考察了不同用量的L-Glu对MIL-101 晶体生长的促进作用.实验结果表明,当L-Glu修饰比例为 6%(x)时,晶体呈正八面体分布规则,颗粒均匀,呈(113)晶面择优取向生长,接近MIL-101的理论模拟值;微孔体积高达1.65 cm3/g,比表面积高达3 679.51 m2/g,具有良好的N2 吸附-脱附性能和热稳定性.气体吸附测试表明,298 K及5 MPa下,MIL-101-6%Glu对CO2,CH4 的吸附量分别达22.94,7.10 mmol/g,对N2 的吸附量低至3.94 mmol/g,优于单一MIL-101.
Abstract
L-glutamic acid(L-Glu)was used as a secondary ligand,and MIL-101-x Glu was synthesized via a one-pot method.The effect of different dosages of L-Glu on the crystal growth of MIL-101 was investigated by means of XRD,N2 adsorption-desorption,SEM,and TG.The experimental results show that MIL-101-6%Glu represents an octahedral microstructure with uniform granular particle sizes and preferential growth along the(113)crystal plane,closely matching the theoretically simulated value of MIL-101.The material exhibits a high pore volume of 1.65 cm3/g and a specific surface area of 3 679.51 m2/g and shows excellent N2 adsorption-desorption properties,as well as thermal stability.Gas adsorption tests at 298 K and 5 MPa show that MIL-101-6%Glu has CO2 and CH4 adsorption capacities of 22.94 and 7.10 mmol/g,respectively,with a low N2 adsorption capacity of 3.94 mmol/g,surpassing the performance of pure MIL-101.
关键词
金属有机框架/MIL-101/吸附/L-谷氨酸Key words
metal organic framework/MIL-101/adsorption/L-Glu引用本文复制引用
出版年
2025
国家科技期刊平台
NSTL
万方数据