Please use this identifier to cite or link to this item: https://doi.org/10.1039/c2jm30552f
Title: Ultrafast reduction of graphene oxide with Zn powder in neutral and alkaline solutions at room temperature promoted by the formation of metal complexes
Authors: Mei, X.
Zheng, H.
Ouyang, J. 
Issue Date: 14-May-2012
Citation: Mei, X., Zheng, H., Ouyang, J. (2012-05-14). Ultrafast reduction of graphene oxide with Zn powder in neutral and alkaline solutions at room temperature promoted by the formation of metal complexes. Journal of Materials Chemistry 22 (18) : 9109-9116. ScholarBank@NUS Repository. https://doi.org/10.1039/c2jm30552f
Abstract: Graphene has been attracting strong attention due to its interesting structure and properties and important applications in many areas. The process of the oxidation of graphite into graphene oxide (GO) and the subsequent reduction of GO into graphene is regarded as an effective process to produce graphene on a large scale. The quality of the reduced GO is strongly dependent on the reduction method. This paper reports the reduction of GO with Zn powder in neutral and alkaline aqueous solutions at room temperature. The reducing capability of Zn powder can be significantly improved through the complex formation of Zn 2+ with other species in solution, which greatly lowers the Zn 2+ concentration. Ethylenediaminetetraacetic acid (EDTA) can form an Zn-EDTA 2- complex with Zn 2+ and it is used for the reduction of GO by Zn in a neutral solution. The complex formation gives rise to quite low Zn 2+ concentrations in solution. This effectively lowers the reduction potential of Zn/Zn 2+ and enables the reduction of GO in neutral solutions. GO can be effectively reduced by Zn powder in alkaline solutions without EDTA as well. This is attributed to the complex formation of Zn 2+ with OH -, where Zn 2+ + 4OH -→ Zn(OH) 4 2-. The reduced GO produced by these methods has high quality. Their C/O ratios for products obtained through GO reductions in neutral and alkaline solutions are 33.0 and 31.2 and their conductivities are 142 and 135 S cm -1, respectively. © 2012 The Royal Society of Chemistry.
Source Title: Journal of Materials Chemistry
URI: http://scholarbank.nus.edu.sg/handle/10635/86827
ISSN: 09599428
DOI: 10.1039/c2jm30552f
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

36
checked on Jun 20, 2018

WEB OF SCIENCETM
Citations

33
checked on Jun 13, 2018

Page view(s)

23
checked on Apr 20, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.