Simultaneous bio-functionalization and reduction of graphene oxide by baker's yeast

Simultaneous reduction and functionalization of graphene oxide was carried out in presence of baker's yeast at room temperature. [Display omitted] ► Environmentally friendly reduction of GO by using Baker's yeast has been described. ► Nicotinamide adenine dinucleotide phosphate of yeast co...

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Bibliographic Details
Published in:Chemical engineering journal (Lausanne, Switzerland : 1996) Switzerland : 1996), 2012-02, Vol.183, p.526-533
Main Authors: Khanra, Partha, Kuila, Tapas, Kim, Nam Hoon, Bae, Seon Hyeong, Yu, Dong-sheng, Lee, Joong Hee
Format: Article
Language:English
Subjects:
Amines
bakers yeast
Bio-functionalization
chemical engineering
cost effectiveness
epoxides
Fourier transform infrared spectroscopy
Graphene
NADP (coenzyme)
Reduction
Saccharomyces cerevisiae
Ultraviolet–visible spectroscopy
X-ray photoelectron spectroscopy
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Summary:Simultaneous reduction and functionalization of graphene oxide was carried out in presence of baker's yeast at room temperature. [Display omitted] ► Environmentally friendly reduction of GO by using Baker's yeast has been described. ► Nicotinamide adenine dinucleotide phosphate of yeast couples with graphene. ► The yeast reduced graphene forms stable water dispersion. ► Reduction of GO can be inhibited by chloramphenicol and cycloheximide inhibitors. An environmentally friendly, cost effective, and simple methodology for the preparation of surface modified graphene has been described in this paper. Baker's yeast containing nicotinamide adenine dinucleotide phosphate (NADPH) has been used as a reducing and functionalizing agent. The amine functional groups of NADPH can easily couple with the epoxy functionalities of graphene oxide (GO) and forms stable water dispersion of yeast-reduced graphene oxide (YR-GO). Ultraviolet–visible spectroscopy, Fourier transform infrared spectroscopy (FT-IR), and X-ray photoelectron spectroscopy (XPS) analysis confirm the successful reduction of GO to graphene. FT-IR and XPS analysis also indicate the doping of amine (NH2) functionalities of NADPH molecules on the surface of graphene. The formation of defects further supports the bio-functionalization of graphene as indicated in the Raman spectrum of YR-GO. All these findings clearly indicate that GO can be reduced and functionalized by simple eco-friendly method by using Baker's yeast to produce water dispersible graphene.
ISSN:1385-8947
1873-3212
DOI:10.1016/j.cej.2011.12.075