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Issue 9, 2012
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Efficient reduction of graphene oxide catalyzed by copper

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Abstract

We report that copper thin films deposited on top of graphene oxide (GO) serve as an effective catalyst to reduce GO sheets in a diluted hydrogen environment at high temperature. The reduced GO (rGO) sheets exhibit higher effective field-effect hole mobility, up to 80 cm2 V−1 s−1, and lower sheet resistance (13 kΩ □−1) compared with those reduced by reported methods such as hydrazine and thermal annealing. Raman and XPS characterizations are addressed to study the reduction mechanism on graphene oxide underneath copper thin films. The level of reduction in rGO sheets is examined by Raman spectroscopy and it is well correlated with hole mobility values. The conductivity enhancement is attributed to the growth of the graphitic domain size. This method is not only suitable for reduction of single GO sheets but also applicable to lower the sheet resistance of Langmuir–Blodgett assembled GO films.

Graphical abstract: Efficient reduction of graphene oxide catalyzed by copper

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Article information


Submitted
09 Oct 2011
Accepted
20 Dec 2011
First published
21 Dec 2011

Phys. Chem. Chem. Phys., 2012,14, 3083-3088
Article type
Paper

Efficient reduction of graphene oxide catalyzed by copper

Y. Lin, K. Liu, C. Wu, C. Chu, J. T. Wang, C. Liang and L. Li, Phys. Chem. Chem. Phys., 2012, 14, 3083
DOI: 10.1039/C2CP23187E

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