CO2-Induced Reversible Dispersion of Graphene by a Melamine Derivative.
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 N2 to control the desorption/adsorption of MET on graphene surface.
Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences , Chengdu 610041, P. R. China.|University of the Chinese Academy of Sciences, Beijing 100049, P. R. China.
Hongyao
H
Yin
Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences , Chengdu 610041, P. R. China.|University of the Chinese Academy of Sciences, Beijing 100049, P. R. China.
Hanbin
H
Liu
Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences , Chengdu 610041, P. R. China.|University of the Chinese Academy of Sciences, Beijing 100049, P. R. China.
Wei
W
Wang
Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences , Chengdu 610041, P. R. China.|State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute, Sichuan University , Chengdu 610065, P. R. China.
Yujun
Y
Feng