Cr-MOFs/氧化石墨烯复合材料H_2及CO_2储存研究  

H_2/CO_2 storage of Cr-MOFs/graphene oxide composites

作　　者：刘双 孙立贤[1,2] 徐芬[2] 张箭 邹勇进[2] 

机构地区：[1]大连化学物理研究所,辽宁大连116023 [2]桂林电子科技大学材料科学与工程学院广西新能源材料结构与性能协同创新中心广西电子信息材料构效关系重点实验室,广西桂林541004

出　　处：《电源技术》2015年第8期1664-1667,共4页Chinese Journal of Power Sources

基　　金："973"资助(2010CB631303);国家自然科学基金(21173111;51371060;51361005);北京理工大学开放课题资助(KFJJ13-12M)

摘　　要：采用水热法合成了不同配比的金属有机框架化合物(metal-organic frameworks,MOFs)MIL-101和氧化石墨烯的多孔复合材料,并测试了其对氢气和二氧化碳的吸附性质。对多孔复合材料进行了X射线粉末衍射、红外光谱、热重分析和氮气吸附等一系列表征分析。复合材料与MIL-101具有相似的晶体结构和物理性质,但H2和CO2的吸附性能分别提高了3.7%和12.5%:在77 K和0.1 MPa条件下,H2的吸附量从MIL-101的1.87%(质量分数)提高到MG-2的1.94%;在273 K和0.1 MPa条件下,CO2的吸附量从MIL-101的5.43 mmol/g提高到MG-2的6.11 mmol/g。分析认为,由于多孔的MOFs材料MIL-101在氧化石墨烯表面环氧基团作用下,其晶粒尺寸得到控制且均匀分散,因此复合材料的气体吸附性能得到了显著的改善。New porous composites with different percentages of MIL-101 and graphene oxide （GO） were prepared by hydrothermal method, and the H2 and CO2 adsorption properties of these composites were measured. The materials were characterized by X-ray diffraction, FTIR spectroscopy, thermogravimetric analyses and nitrogen adsorption. The composites has similar crystal structure and morphology with MIL-101, but the H2 and CO2 adsorption increase by 3.7% and 12.5%, respectively. The H2adsorption increases from 1.87% of MIL-101 to 1.94% of MG-2 at 77 K and 0.1 MPa; the CO2 adsorption increases from 5.43 mmol/g to 6.11 mmol/g at 273 K and 0.1 MPa. With the epoxy group on the surface of GO,the crystal size is controlled and uniformly dispersed, so the gas adsorption performance enhances.

关 键 词：氧化石墨烯 MIL-101 多孔复合材料 储氢 二氧化碳 

分 类 号：TM911[电气工程—电力电子与电力传动]