Journal
LANGMUIR
Volume 31, Issue 44, Pages 12260-12267Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.langmuir.5b02831
Keywords
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Funding
- National Natural Science Foundation of China [21273223, 21173207]
- Science and Technology Department of Sichuan Province [2010JQ0029]
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Smart graphene with stimuli-responsive dispersity has great potential for applications in medical and biochemical fields. Nevertheless, reversible dispersion/aggregation of graphene in water with biocompatible and removable trigger still represents a crucial challenge. Here, we report CO2-induced reversible graphene dispersion by noncovalent functionalization of reduced graphene oxide with N-2,N-4,N-6-tris(3-(dimethylamino)propyl)-1,3,5-triazine-2,4,6-triamine (MET). It was demonstrated that MET can be strongly adsorbed on graphene surface through van der Waals interaction to facilitate dispersing graphene in water. Moreover, reversible aggregation/dispersion of graphene can be achieved simply by alternately bubbling CO2 and N-2 to control the desorption/adsorption of MET on graphene surface.
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