【摘要】 以氧化石墨烯（GO）为骨架,β-环糊精（β-CD）为交联剂,采用一步水热法成功制备了结构均匀的环糊精基石墨烯气凝胶（C-GAs）。采用比表面及孔径分析仪对样品的孔隙结构进行了表征,并进一步研究了其孔隙结构对二氧化碳（CO₂）、氢气（H₂）和甲烷（CH₄）气体的吸附性能的影响。结果显示,在β-CD∶GO的质量配合比为0.5∶1条件下,C-GAs拥有较高的比表面积537m²/g和总孔容0.750m³/g,显示了其极好的结构特性,在298℃,1.0Pa条件下,C-GAs对CO₂的吸附量达到44.73mg/g,对CH₄的吸附量达到6.82mg/g;在77℃,1.0Pa条件下,C-GAs对H₂的吸附量达到1.17mg/g,制备的C-GAs对CO₂具有较强的吸附能力以及良好的吸附选择性,且制备过程简单、绿色、安全。更多还原

【Abstract】 β-cyclodextrin-based graphene aerogels（C-GAs）were prepared with graphene oxide（GO）as framework andβ-cyclodextrin（β-CD）as carbon sourceby using the hydrothermal method.Specific surface analysis instrument revealed the pore structure and gas adsorption of C-GAs.The results indicated that C-GAs had higher specific surface areas of 537 m²/g and total pore volumes of 0.750 cm³/g.The prepared C-GAs with the mass ratio of0.5（β-CD/GO）exhibited the highest adsorption capacity of 44.73 mg/g for CO₂,6.82 mg/g for CH₄ and 1.17 mg/g for H₂,respectively.C-GAs showed the stronger adsorption capacity and excellent adsorptive selectivity.The craft process was convenient,green and safe,which will be utilized in methane treatment,beverage processing,agricultural product protection and supercritical extraction.更多还原