两种新型多孔金属-有机凝胶的合成、表征与气体吸附性能  

Synthesis,Characterization and Gas Adsorption Properties of Two New Porous Metal-organic Gels

作　　者：陈思如[1] 薛铭[1] 潘莹[1] 徐丹[1] 裘式纶[1] 

机构地区：[1]吉林大学无机合成与制备化学国家重点实验室,长春130012

出　　处：《高等学校化学学报》2015年第5期815-820,共6页Chemical Journal of Chinese Universities

基　　金：国家'九七三'计划项目(批准号:2012CB821700);国家自然科学基金(批准号:21261130584;21101072)资助~~

摘　　要：以1,4-二(3-乙酰丙酮基)苯(DAB)为有机配体分别与铝离子和铬离子反应,合成出2个新型的金属-有机凝胶:Al-湿凝胶和Cr-湿凝胶,通过直接干燥法得到相应的2种多孔干凝胶:Al-干凝胶和Cr-干凝胶.通过X射线粉末衍射仪(PXRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、傅里叶变换红外光谱仪(FTIR)、热重分析仪(TGA)、X射线能谱仪(EDS)和氮气吸附-脱附仪对凝胶材料的结构和形貌进行了表征.结果显示,2种多孔金属有机凝胶材料是由球状纳米粒子堆积而成,具有较高的比表面积、丰富的微孔及少量的介孔结构.气体吸附性能测试结果表明,Al-干凝胶的比表面积为790.3 m2/g,在1.01×105Pa,77 K下能够吸附117.45 cm3/g的氢气,在273 K下能够吸附60.74 cm3/g的二氧化碳.Two new porous metal-organic gels（Al-wet gel and Cr-wet gel） were synthesized by self-assembly of 1,4-di-（3＇-acetylacetonato） benzene and corresponding transition metal salts,then Al-xerogel and Cr-xerogel were obtained by direct drying two wet gels.The gels were characterized by powder X-ray diffraction（XRD）,scanning electron microscope（SEM）,transmission electron microscope（TEM）,Fourier transform infrared spectroscopy（FTIR）,thermogravimetric analysis（TGA）,energy dispersive spectrometry（EDS）and N2 sorption experiments.The results indicate that the Al-xerogel and Cr-xerogel are formed by uniformed spherical nanoparticals.The unique structures show high microporisity and a small amount of mesopores as well as high thermal stability.Furthermore,these materials performed gas adsorption property.The Al-xerogel has a surface area of 790.3 m2/ g,and it could adsorbe 117.45 cm^3/g H2 at 77K and 1.01 × 10^5Pa and 60.74 cm^3/g CO2 at 273K and 1.01 ×10^5Pa.

关 键 词：金属-有机凝胶 1 4-二(3-乙酰丙酮基)苯 气体吸附 

分 类 号：O614[理学—无机化学]