氧化石墨烯-羧基碳纳米管-多乙烯多胺三维蜂窝状材料吸附CO2.pdf

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CIIEMIICAL INDUSTRY AND ENGINEERIING PROGRESS
2016年第35卷第11期
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研究开发
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氧化石墨烯-羧基碳纳米管-多乙烯多胺三维蜂窝状材料吸附CO2
胡航标,张涛,崔征,厝盛伟
四川大学化学工程学院,四川成都610065
摘要:以氧化石墨烯一羧基碳納米管水溶液为原料,葪萄糖酸β内酯为交联促进剂,通过冷冻千燥法制得负载有
多乙烯多胺的氧化石墨烯-羧基碳幼米管三维多孔气凝胶。通过在制备过程中改变多乙烯多胺的加入量可以调节
其负裁量。FIKR、XRID、1(G、SHM、XPS、 Raman、N2吸脱附等測试表征发现:多乙烯多胺通过酰胺键与基体
迮接,所得材料呈蜂窝状,且比表面积、孔容和平均孔径随胺类负載量的増加而逐渐降低,引入多乙烯多胺后
的气疑胶材籵通过化学作用实现CO2吸附。在200kPa、328K下,多乙烯多胺含量为55.8%的改性吸附剂的CO2
吸附量可达39 mmog,为相同条件下木改性吸附剂的9.8倍。结果表明,将多乙烯多胺、氧化石墨烯和羧基碳
纳米管制备成三维蜂窝状多孔材料能有效提高CO)2吸附性能。
关键词:纳米材料;二氧化碳;凝胶;吸附
中图分类号:TQ424.29文献标志码:A文章编号:1000-6613(2016)1-3576-09
DOI:10.16085jisn.1000-6613.2016.11.029
Preparation of three-dimensional honeycomb-like material of graphene
oxide-carboxylated carbon nanotube-polyethylenepolyamine to
adsorb CO2
7711angbia0, ZIAN(T fao, (U Zheng, TAN(T Shengwei
College of Chemical Enginccring, Sichuan University, Chendu 610065, Sichuan, China)
Abstract: Using graphene oxide and carboxylated carbon nanotube as base material and gluconic acid
B lactone as crosslinking promoter, we prepared a three-dimensional (3D) porous aerogel material
functionalized by polycthylcncpolyaminc (PEPA) with a frcczc-drying mcthod. Thc PEPA loading was
adjusted by changing the PEPA dosage. The as-synthesized 3D porous aerogel material were
characterized by FTIR, XRD, TG, SEM, XPS, Raman and N2 adsorption-desorption. The resulls
indicated that PEPA was grafted by an amide bond between PEPA and graphene oxide. The 3D porous
matcrial had a honeycomb likc-appcarancc. The spccific surfacc arca, porc volumc and avcragc porc
Sizc wcrc decreased with incrcasing PEPA loading. The adsorption of CO2 on the 3D honcycomb-likc
material was based on a mechanist of chemisorption. At 200kpa and 328K, the CO2 adsorption
capacity on the 3D porous material with a PEPA content of 55.8% reached up to 3. mmol/g, which was
9. 8 times to that on the acrogcl without PEPA loading. Thc rcsults showcd that crosslinking
polycthylcncpolyaminc with graphene oxide shcct and carboxylated carbon nanotubc to preparc 3D
porous acrogcl matcrial cffcctivcly improvcd the CO2 adsorption capacity
Key words: nanomaterials; carbon dioxide; gels; adsorption
温室效应造成的全球气候问题已成为人类进入
收稿日期:2016-03-04:修改稿日期:2016-03-20
21世纪以米面临的最大生存挑战。二氧化碳(CO2
基金项目:国家自然科学基金项日(21276163、21576168)
第一作者:胡航标(1991),男,士研究牛。联系人:唐盛伟,教
的大量排放被认为是温室效应的主要成因?.为实
授。T- mail lanydynasly
万方数括