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- Title
An efficient and eco-friendly solution-chemical route for preparation of ultrastable reduced graphene oxide suspensions.
- Authors
He, Dafang; Shen, Liming; Zhang, Xiaoyan; Wang, Yifeng; Bao, Ningzhong; Kung, Harold H.
- Abstract
We describe a facile and eco-friendly solution approach to chemically reduce graphene oxide (GO) to high-quality graphene using nontoxic inexpensive reductants. The reduction process and mechanism of a group of eco-friendly reductants were systematically studied. These reductants perform quite differently in terms of reduction rate ( l-ascorbic acid [ l-AA] > d-fructose > sucrose > glucose > sodium sulfite), density of small sp2 domains ( l-AA > sodium sulfite > glucose > sucrose > d-fructose), degree of reduction ( l-AA > glucose > d-fructose > sodium sulfite > sucrose), and stability of the reduced GO suspension ( l-AA > d-fructose > sucrose > glucose > sodium sulfite). l-AA shows the highest reducing ability, achieving the largest extent of reduction after 10 min in the presence of ammonia. Both residual oxygen functionalities and the adsorbed oxidization products of l-AA on the graphene surface are responsible for stabilizing the reduced GO suspension over several months. © 2014 American Institute of Chemical Engineers AIChE J, 60: 2757-2764, 2014
- Subjects
GRAPHENE oxide; VITAMIN C; SODIUM sulfites; GLUCOSE; FRUCTOSE
- Publication
AIChE Journal, 2014, Vol 60, Issue 8, p2757
- ISSN
0001-1541
- Publication type
Article
- DOI
10.1002/aic.14499