Graphene Synthesis via Exfoliation of Graphite by Ultrasonication

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2015 by IJETT Journal
Volume-26 Number-1
Year of Publication : 2015
Authors : Vandana Sharma, Avesh Garg, Suresh Chander Sood
  10.14445/22315381/IJETT-V26P208

MLA 

Vandana Sharma, Avesh Garg, Suresh Chander Sood"Graphene Synthesis via Exfoliation of Graphite by Ultrasonication", International Journal of Engineering Trends and Technology (IJETT), V26(1),37-42 August 2015. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract
Graphene has newly grabbed the attention of many researchers and scholars for it’s huge range of properties, mainly high surface area is the most innovative field of research. High surface area property has a great significance for its demand in almost all applications in addition to supercapacitors. Accordingly, an attempt here is accomplished to create the graphene by sonication method using ODCB solvent. Different characterization techniques are mentioned in support of the work accomplished and it is found that the interlayer distance between graphite layers increases with increasing duration of sonication process. In XRD result, it can be found that first peak at 2θ of 26.4 degree disappears and a distinguishable peak at 11.3 degree with inter graphite layer spacing in close value with 0.78 nm in association with some other diffraction peaks appear. SEM images very nicely represent homogeneous graphene film with particle size varying from 42 to 150 nm. UV-VIS absorption spectra suggests that the peak absorption in graphene decreases with high wavelengths. At 210 nm, a peak can be noticed and one more peak around 226 nm with a little bit less intensity of absorption peak can be observed in UVVIS spectra. The details offered by SEM, XRD and UV-VIS throughputs are also mentioned. It is quoted that upon sonication the distance between graphite layers increases, thereby originating graphene. Thus it can be concluded that the graphene with enormous extraordinary properties (including Super capacitor) can be synthesized following the sonication method using organic solvents. Long hour processing via sonicator leads to formation of homogenous dispersion of graphene in case of ODCB. For thorough exfoliation of graphite, the sonication should be maintained with a very dilute system in order to reduce the importance of the graphene sheets recombination process.

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Keywords
Graphene, ODCB, XRD, UV-VIS and SEM.