摘要
采用碱辅助的原位水热合成法制备了纳米金属有机骨架材料MIL-101(Cr)NH2,研究了合成液中NaOH加入量对其晶体结构、形貌和孔结构的影响,测定了273.4,298和333K下CO2和N2在MIL-101(Cr)NH2上的等温吸附曲线,并对其性质进行了表征.结果表明,加入适量碱(NaOH:NH2BDC=4:2,摩尔比)可得到粒径约40nm的MIL-101(Cr)NH2纳米颗粒,其BET比表面积可达2594m2/g,孔容为2.11cm3/g,273.4K时CO2的吸附量可达25.9mmol/g,CO2与N2的理想分离系数为19.4.
The nano MIL-101（Cr）-NH2 material was synthesized by in situ hydrothermal method. The addition amount of NaOH in the reaction solution and its influence on the crystal structure, morphology and pore feature of MIL-101（C0-NH2 were investigated. Adsorption isotherms of CO2 and Nz at 273.4, 298 and 333 K on MIL-101（C0-NH2 were measured. And MIL-101（Cr）-NH2 was characterized. The results show that nano MIL-101（Cr）-NH2 particles with the size about 40 nm and the specific surface area as high as 2 594 m2/g and pore volume 2.11 cma/g could be synthesized at the optimal condition （NaOH：NHEBDC=4：2, molar ratio）. The material has good CO2 adsorption capacity and selectivity, its CO2 adsorption capacity and ideal separation factor of CO2 over N2 could reach 25.9 mmol/g and 19.4 at 273.4 K, respectively.
出处
《过程工程学报》
CAS
CSCD
北大核心
2013年第1期146-151,共6页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:51072204
51172249)
