多巴胺修饰石墨烯气凝胶制备及染料吸附性能研究
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摘要
采用自组装的方法将多巴胺(DA)与氧化石墨烯(GO)共混制得多巴胺修饰的石墨烯气凝胶(DA-rGA)。利用SEM和FTIR对制备的产品进行了表征,并研究了其对孔雀石绿(MG)、藏红T(ST)和罗丹明B(RhB)的吸附性能。结果表明,制备的DA-rGA具有三维多孔网络结构,其对MG、ST和RhB的最大吸附量分别为735、1 191、348mg/g,吸附过程符合Langmuir吸附等温式。
Using self-assembled method,the dopamine-modified reduced graphene aerogels(DA-rGA) has been made by co-mixing dopamine(DA)with graphene oxide(GO),the prepared product characterized by means of SEM and FTIR,and its adsorption capability for malachite green(MG),safranine T(ST) and rhodamine B(RhB) investigated.The results show that the prepared DA-rGA has three-dimensional porous structure. Its maximum adsorption capacities for MG,ST and RhB are 735,1 191,348 mg/g,respectively. The adsorption process complies with Langmuir adsorption isotherm.
Using self-assembled method,the dopamine-modified reduced graphene aerogels(DA-rGA) has been made by co-mixing dopamine(DA)with graphene oxide(GO),the prepared product characterized by means of SEM and FTIR,and its adsorption capability for malachite green(MG),safranine T(ST) and rhodamine B(RhB) investigated.The results show that the prepared DA-rGA has three-dimensional porous structure. Its maximum adsorption capacities for MG,ST and RhB are 735,1 191,348 mg/g,respectively. The adsorption process complies with Langmuir adsorption isotherm.
引文
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[4] Li Lingxiao,Li Bucheng,Zhang Junping. Dopamine-mediated fabrication of ultralight graphene aerogels with low volume shrinkage[J].J. Mater. Chem. A,2016,4(2):512-518.
[5] Wan Wenchao,Zhang Ruiyang,Li Wei,et al. Graphene-carbon nanotube aerogel as an ultra-light,compressible and recyclable highly efficient absorbent for oil and dyes[J]. Environ. Sci. Nano.,2016,3(1):107-113.
[6] Lee B,Lee S,Lee M,et al. Carbon nanotubebonded graphene hybrid aerogels and their application to water purification[J]. Nanoscale,2015,7(15):6782-6789.
[7] Ryu J,Ku S H,Lee H,et al. Mussel-inspired polydopamine coating as a universal route to hydroxyapatite crystallization[J]. Adv. Funct.Mater.,2010,20(13):2132-2139.
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[11] Liu Jinshui,Liu Guoning,Liu Wenxiu. Preparation of water-solubleβ-cyclodextrin/poly(acrylic acid)/graphene oxide nanocomposites as new adsorbents to remove cationic dyes from aqueous solutions[J].Chem. Eng. J.,2014,257:299-308.