Graphene oxide was prepared by a modified Hummers method in a Teflon-lined autoclave and then reduced by two different approaches. Alkaline reduction by sodium hydroxide as the control and synergetic reduction which combined sodium hydroxide and microwave irritation were conducted. The products were characterised by transmission electron microscopy, X-ray diffraction, thermo-gravimetric analysis, Fourier transform infrared spectroscopy and by atomic force microscopy. Results showed that the synergetic method possessed higher efficiency. Moreover, the as-prepared samples were monolayers (about 0.8 nm) and could decrease the solubility of ethyl cellulose in ethanol.

References

1. 1)
  - 8. Chen, H.Q., Muller, M.B., Gilmore, K.J., Wallace, G.G., Li, D.: ‘Mechanically strong, electrically conductive, and biocompatible graphene paper’, Adv. Mater., 2008, 20, pp. 3557–3561 (doi: 10.1002/adma.200800757).
2. 2)
  - 9. Stankovich, S., Dikin, D.A., Piner, R.D., et al: ‘Synthesis of graphene-based nanosheets via chemical reduction of exfoliated graphite oxide’, Carbon, 2007, 45, pp. 1558–1565 (doi: 10.1016/j.carbon.2007.02.034).
3. 3)
  - 11. Wu, Z.S., Pei, S., Ren, W., Tang, D., Gao, L., Liu, B.: ‘Field emission of single-layer graphene films prepared by electrophoretic deposition’, Adv. Mater., 2009, 21, pp. 1756–1760 (doi: 10.1002/adma.200802560).
4. 4)
  - 4. Dmitry, V., Kosynkin, K.S., Higginbotham, A.L., et al: ‘Longitudinal unzipping of carbon nanotubes to form graphene nanoribbons’, Nature, 2009, 458, pp. 872–876 (doi: 10.1038/nature07872).
5. 5)
  - 2. Loh, K.P., Bao, Q.L.: ‘The chemistry of graphene’, J. Mater. Chem., 2010, 20, pp. 2277–2289 (doi: 10.1039/b920539j).
6. 6)
  - 6. Zhao, J., Pei, S., Ren, W., Gao, L., Cheng, H.M.: ‘Efficient preparation of large-area graphene oxide sheets for transparent conductive films’, ACS Nano, 2010, 4, pp. 5245–5252 (doi: 10.1021/nn1015506).
7. 7)
  - 9. Bao, C.L., Song, L., Xing, W.Y., Yuan, B.H., Wilkie, C.A., Huang, J.L.: ‘Preparation of graphene by pressurized oxidation and multiplex reduction and its polymer nanocomposites by masterbatch-based melt blending’, J. Mater. Chem., 2012, 22, pp. 6088–6096 (doi: 10.1039/c2jm16203b).
8. 8)
  - K.S. Novoselov , A.K. Geim , S.V. Morozov , D. Jiang , Y. Zhang , S.V. Dubonos , I.V. Grigorieva , A.A. Firsov . Electric field effect in atomically thin carbon films. Science , 666 - 669
9. 9)
  - 17. Hernandez, Y., Nicolosi, V., Lotya, M., et al: ‘High-yield production of graphene by liquid-phase exfoliation of graphite’, Nat. Nanotechnol., 2008, 3, pp. 563–568 (doi: 10.1038/nnano.2008.215).
10. 10)
  - 7. Shin, H.J., Kim, K.K., Benayad, A., Yoon, S.M., Park, H.K., Jung, I.S.: ‘Efficient reduction of graphite oxide by sodium borohydride and its effect on electrical conductance’, Adv. Funct. Mater., 2009, 19, pp. 1987–1992 (doi: 10.1002/adfm.200900167).
11. 11)
  - L.Y. Jiao , L. Zhang , X.R. Wang , G. Diankov , H.J. Dai . Narrow graphene nanoribbons from carbon nanotubes. Nature , 877 - 880

Synergetic reduction of graphene oxide by sodium hydroxide and microwave irritation

References

Related content