Direct electro-deposition of graphene from aqueous suspensions
Data(s) |
01/01/2011
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Resumo |
We describe the direct electro-chemical reduction of graphene oxide to graphene from aqueous suspension by applying reduction voltages exceeding -1.0 to -1.2 V. The conductivity of the deposition medium is of crucial importance and only values between 4-25 mS cm<sup>-1</sup> result in deposition. Above 25 mS cm<sup>-1</sup> the suspension de-stabilises while conductivities below 4 mS cm<sup><sub>-1</sub></sup> do not show a measurable deposition rate. Furthermore, we show that deposition can be carried out over a wide pH region ranging from 1.5 to 12.5. The electro-deposition process is characterised in terms of electro-chemical methods including cyclic voltammetry, quartz crystal microbalance, impedance spectroscopy, constant amperometry and potentiometric titrations, while the deposits are analysed <i>via</i> Raman spectroscopy, infra-red spectroscopy, X-ray photoelectron spectroscopy and X-ray diffractometry. The determined oxygen contents are similar to those of chemically reduced graphene oxide, and the conductivity of the deposits was found to be ~20 S cm<sup> -1</sup>.<br /> |
Identificador | |
Idioma(s) |
eng |
Publicador |
Royal Society of Chemistry |
Relação |
http://dro.deakin.edu.au/eserv/DU:30040351/forsyth-directelectrodeposition-2011.pdf http://dx.doi.org/10.1039/c1cp20173e |
Direitos |
2011, The Owner Societies |
Tipo |
Journal Article |