Reduced graphene oxide synthesis by high energy ball milling

Mondal, O. ; Mitra, S. ; Pal, M. ; Datta, A. ; Dhara, S. ; Chakravorty, D. (2015) Reduced graphene oxide synthesis by high energy ball milling Materials Chemistry and Physics, 161 . pp. 123-129. ISSN 0254-0584

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Graphene oxide is transformed to reduced graphene oxide by high energy ball milling in inert atmosphere. The process of ball milling introduces defects and removes oxygen functional groups, thereby creating the possibility of fine tuning the band gap of all intermediate stages of the structural evolution. A limit of the backbone sp2 network structure has been found which should be able to accommodate defects, before amorphization sets in. The amorphization of graphene oxide is achieved rather quickly in comparison to that of graphite. From thermogravimetric and differential scanning calorimetric analysis along with Fourier transform infrared (FTIR) and Raman spectroscopic studies, it is found that the number of oxygen-containing groups decreases at a faster rate than that of aromatic double bonds with increasing ball milling time with a maximum limit of 3 h. Several characterization techniques (FTIR, Raman, UV–Visible and X-ray photoelectron spectroscopy) have confirmed that the material synthesized is, indeed, reduced graphene oxide.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Nanostructures; Surfaces; Thermogravimetric Analysis; Fourier Transform Infrared Spectroscopy; Raman Spectroscopy and Scattering
ID Code:99358
Deposited On:06 Apr 2016 04:37
Last Modified:06 Apr 2016 04:37

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