摘要
采用水热法合成金属有机骨架材料MIL-101,并利用X线衍射(XRD)、低温N2吸附等测试手段对合成的材料进行表征。结果表明:制备的MIL-101的BET(Brunauer-Emmett-Teller)比表面积达到3 142 m2/g,孔容为1.78cm3/g。根据77 K下N2吸附等温线数据,采用巨正则蒙特卡洛法分析MIL-101的孔径分布,其分析结果与文献所报道的数据吻合。考察了CO、N2混合体系在MIL-101上的吸附性能,实验结果表明:MIL-101结构中不饱和金属Cr3+提供的活性位能从混合气体中高效吸附分离CO,而且对CO的吸附容量达到45.0 cm3/g(298 K,0.1 MPa),对CO的吸附容量约是NA吸附剂的2倍。
A metal organic framework（MIL-101） was synthesized by the hydrothermal method.MIL-101 was characterized by X-ray diffraction（XRD） and nitrogen adsorption analysis.The BET surface areas and total pore volumes of MIL-101 were 3 142 m2/g and 1.78 cm3/g,respectively.Based on the experimental nitrogen（77 K） adsorption data,the pore size distribution of MIL-101 calculated from the Grand Canonical Monte Carlo（GCMC） method was in a good agreement with the reported data.The adsorption isotherm of CO on the MIL-101 showed that the new adsorbent had high selectivity for CO in CO/N2 mixture,in which the existence of co-ordinatively unsaturated metal sites in the pore channels of MIL-101 increased the capacity for CO adsorption.The CO adsorption quantity was 45.0 cm3/g（298 K,0.1 MPa）,and was 2 times than the results adsorbed on NA adsorbent.It had potential for industrial application in the CO/N2 mixture separation for CO removal or recovery.
出处
《南京工业大学学报（自然科学版）》
CAS
北大核心
2012年第5期7-11,共5页
Journal of Nanjing Tech University(Natural Science Edition)
基金
国家自然科学基金资助项目(20976082)
江苏省高校自然科学重大基础研究项目(08KJA530001)
作者简介
陈勇（1986-），男，江苏丹阳人，硕士，主要研究方向为多孔材料的合成及气体吸附分离；马正飞（联系人），教授，E-mail：mazf@njut．edu．cn．
