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。
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.
作者
刘康恺
孟彩云
郑鑫垚
孟龙月
孟万
Liu Kangkai;Meng Caiyun;Zheng Xinyao;Meng Longyue;Meng Wan(Department of Chemistry,College of Science, Yanbian University, Yanji 133002;School ofChemistry, Chemical Engineering and Materials Science, Shandong Normal University,Jinan 250000;Jilin Special Equipment Inspection Center,Jilin 132021;Department ofPolymers Materials and Engineering, College of Engineering, Yanbian University, Yanji 133002)
出处
《化工新型材料》
CAS
CSCD
北大核心
2019年第6期184-188,共5页
New Chemical Materials
基金
国家自然科学基金(51703192)
关键词
石墨烯气凝胶
水热法
环糊精
气体吸附
graphene aerogel
hydrothermal method
cyclodextrin
gas adsorption
