环糊精基石墨烯气凝胶的制备及其气体吸附性能研究
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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(CO_2)、氢气(H_2)和甲烷(CH_4)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537m~2/g和总孔容0.750m~3/g,显示了其极好的结构特性,在298℃,1.0Pa条件下,C-GAs对CO_2的吸附量达到44.73mg/g,对CH_4的吸附量达到6.82mg/g;在77℃,1.0Pa条件下,C-GAs对H_2的吸附量达到1.17mg/g,制备的C-GAs对CO_2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 m~2/g and total pore volumes of 0.750 cm~3/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 CO_2,6.82 mg/g for CH_4 and 1.17 mg/g for H_2,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.
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 m~2/g and total pore volumes of 0.750 cm~3/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 CO_2,6.82 mg/g for CH_4 and 1.17 mg/g for H_2,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.
引文
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[2]Meng L Y,Park S J.One-pot synthetic method to prepare high N-doped nanoporous carbons for CO2adsorption[J].Materials Chemistry and Physics,2014,143:1158-1163.
[3]张研,孟龙月,孟万.SBA-15介孔硅片胺基修饰及其CO2吸附[J].化工新型材料,2017,45(3):131-133.
[4]曹静,刘博宇,张轩,等.有机胺固载三维蠕虫型介孔SiO2对CO2的吸附性能研究[J].化工新型材料,2017,45(9):108-110.
[5]Meng L Y,Park S J.Effect of ZnCl2activation on CO2adsorption of N-doped nanoporous carbons from polypyrrole[J].Journal of Solid State Chemistry,2014,218:90-94.
[6]Ampomah W,Balch R S,Grigg R B,et al.Co-optimization of CO2-EOR and storage processes in mature oil reservoirs[J].Greenhouse Gases-Science and Technology,2017,7(1):128-142.
[7]唐志红,韩卓,杨光智,等.CO2捕集用具有多级孔结构纳米孔炭的制备[J].新型炭材料,2013,28(1):55-60.
[8]吕生华,朱琳琳,李莹,等.氧化石墨烯复合材料的研究现状及进展[J].材料工程,2016,44(12):107-117.
[9]Moon I K,Yoon S,Chun K Y,et al.Highly elastic and conductive N-doped monolithic graphene aerogels for multifunctional applications[J].Advanced Functional Materials,2015,25(45):6976-6984.
[10]刘康恺,曹永慧,沃涛,等.石墨烯及其复合材料的研究进展[J].广州化工,2014,42(23):15-17.
[11]李娜,马兆昆,陈铭,等.石墨烯/聚酰亚胺复合石墨纤维的结构与性能[J].材料工程,2017,45(9):31-37.
[12]Zhao B,Wang Z X,Gao Y,et al.Hydrothermalsynthesis of layer-controlled MoS2/graphenecompositeaerogelsfor lithiumion battery anode materials[J].Applied Surface Science,2016,390:209-215.
[13]Lamberti A,Gigot A,Bianco S,et al.Self-assembly of graphene aerogel on copper wire for wearable fiber-shaped supercapacitors[J].Carbon,2016,105:649-654.
[14]Gholipour-Ranjbar H,Ganjali M R,Norouzi P,et al.Synthesis of cross-linked graphene aerogel/Fe2O3 nanocomposite with enhanced supercapacitive performance[J].Ceramics International,2016,42(10):12097-12104.
[15]Sun Y Q,Wu Q,Shi G Q.Supercapacitors based on self-assembled graphene organogel[J].Physical Chemistry Chemical Physics,2011,13(38):17249-17254.
[16]Tang G,Jiang Z G,Li X,et al.Three dimensional graphene aerogels and their electrically conductive composites[J].Carbon,2014,77(10):592-599.
[17]韩俊儒,孟万,孟龙月.PEI改性氧化石墨烯的制备及其CO2的吸附[J].广州化工,2016,44(19):114-116.
[18]张浩,黄新杰,宗志芳,等.基于吸附性能的生物质基多孔活性炭制备方案的响应面法优化[J].材料工程,2017,45(6):67-72.
[19]He K,Qiu F X,Qiu J,et al.Selective adsorption of L-TA/DTA by beta-cyclodextrin derivative modified with L-tryptophan:isotherm,kinetic and thermodynamics studies[J].Journal of Industrial and Engineering Chemistry,2014,20(4):1293-1300.
[20]Zhu G Y,Xiao Z B,Zhou R J,et al.Study of production and pyrolysis characteristics of sweet orange flavor-beta-cyclodextrin inclusion complex[J].Carbohydrate Polymers,2014,105:75-80.
[21]徐婷,李云珂,彭少贤,等.石墨烯制备方法及研究进展[J].化工新型材料,2017,45(8):24-25.
[22]魏建文,林志峰,何泽瑜,等.微孔-介孔材料吸附CO2的研究进展[J].化工新型材料,2017,45(7):4-6.
[23]宋涛,廖景明,肖军,等.生物质活性炭微孔和中孔结构对CO2吸附性能的影响[J].新型炭材料,2015,30(2):156-166.
[24]张向倩,李文翠,陆安慧.多孔炭材料的设计合成及CO2吸附分离研究进展[J].新型炭材料,2015,30(6):481-501.