WEI Wei, LU Wei, YANG Quan-hong. High-concentration graphene aqueous suspension and a membrane self-assembled at the liquid-air interface. New Carbon Mater., 2011, 26(01): 36-40.
Citation:
WEI Wei, LU Wei, YANG Quan-hong. High-concentration graphene aqueous suspension and a membrane self-assembled at the liquid-air interface. New Carbon Mater., 2011, 26(01): 36-40.
WEI Wei, LU Wei, YANG Quan-hong. High-concentration graphene aqueous suspension and a membrane self-assembled at the liquid-air interface. New Carbon Mater., 2011, 26(01): 36-40.
Citation:
WEI Wei, LU Wei, YANG Quan-hong. High-concentration graphene aqueous suspension and a membrane self-assembled at the liquid-air interface. New Carbon Mater., 2011, 26(01): 36-40.
School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China
Funds:
National Nature Science Foundation of China (50972101), Guangdong-Hong Kong Public Bidding Program Special program for Dongguan (2009205119), Program for the integration of production, teaching and research (2009B090300011) Ministry of Education, Guangdong, Guangdong-CAS strategic cooperation Program (2009B091300007), Foundation of State Key Laboratory of Coal Conversion (Grant NO. 10-11-913) and Program for New Century Excellent Talents in University (NCET-07-0607), Ministry of Education, China.
Graphene dispersion in different surfactant aqueous solutions was investigated by absorbance measurements. Polyvinylpyrrolidone (PVP) is an excellent low cost and "green" dispersion agent. By increasing the concentration of the PVP solution, the graphene suspension concentration can reach ~1.3mg/mL, which is higher than those reported previously. This high-concentration graphene dispersion will play an important role in the application of graphene-based materials. A graphene-based membrane was assembled by the evaporation of a PVP-stabilized graphene suspension at the liquid-air interface. The free-standing, self-assembled membrane with a flat surface and ordered structure could find great practical value in a wide range of applications.
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