TY - JOUR
T1 - Preparation of water-soluble graphene nanoplatelets and highly conductive films
AU - Xu, Xuezhu
AU - Zhou, Jian
AU - Jestin, Jacques
AU - Colombo, Veronica
AU - Lubineau, Gilles
N1 - KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: This research was supported by King Abdullah University of Science and Technology (KAUST). The authors are grateful to KAUST for its continuous support.
PY - 2017/8/11
Y1 - 2017/8/11
N2 - This paper tackles the challenge of preparation stable, highly concentrated aqueous graphene dispersions. Despite tremendous recent interest, there has been limited success in developing a method that ensures the total dispersion of non-oxidized, defect-free graphene nanosheets in water. This study successfully demonstrates that few-layer graphene nanoplatelets (GNPs) can form highly concentrated aqueous colloidal solutions after they have been pretreated in a low-concentration inorganic sodium-hypochlorite and sodium-bromide salted aqueous solvent. This method retains the graphitic structure as evidenced by nuclear magnetic resonance spectroscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. Vacuum-filtrated freestanding films demonstrate an electrical conductivity as high as 3000 S m−1. This dispersion technique is believed to be applicable not only for GNPs, but also for dispersing other types of graphitic materials, including fullerenes, single/double/multi-walled carbon nanotubes, graphene nanoribbons and etc.
AB - This paper tackles the challenge of preparation stable, highly concentrated aqueous graphene dispersions. Despite tremendous recent interest, there has been limited success in developing a method that ensures the total dispersion of non-oxidized, defect-free graphene nanosheets in water. This study successfully demonstrates that few-layer graphene nanoplatelets (GNPs) can form highly concentrated aqueous colloidal solutions after they have been pretreated in a low-concentration inorganic sodium-hypochlorite and sodium-bromide salted aqueous solvent. This method retains the graphitic structure as evidenced by nuclear magnetic resonance spectroscopy, X-ray photoelectron spectroscopy, and Raman spectroscopy. Vacuum-filtrated freestanding films demonstrate an electrical conductivity as high as 3000 S m−1. This dispersion technique is believed to be applicable not only for GNPs, but also for dispersing other types of graphitic materials, including fullerenes, single/double/multi-walled carbon nanotubes, graphene nanoribbons and etc.
UR - http://hdl.handle.net/10754/625344
UR - http://www.sciencedirect.com/science/article/pii/S0008622317307923
UR - http://www.scopus.com/inward/record.url?scp=85028337883&partnerID=8YFLogxK
U2 - 10.1016/j.carbon.2017.08.007
DO - 10.1016/j.carbon.2017.08.007
M3 - Article
SN - 0008-6223
VL - 124
SP - 133
EP - 141
JO - Carbon
JF - Carbon
ER -