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Synthesis of High-Quality Graphene through Electrochemical Exfoliation of Graphite in Alkaline Electrolyte Prashant Tripathi, Ch. Ravi Prakash Patel, M. A. Shaz*and O. N. Srivastava* Nanoscience Centre, Department of Physics (Centre of Advanced Studies), Banaras Hindu University, Varanasi-220005, INDIA Abstract Owing to wide variety of applications of graphene, high-quality and economical way of synthesizing graphene is highly desirable. In this study, we report a cost effective and simple approach to production of high-quality graphene. Here, the synthesis route is based on electrochemical exfoliation of graphite. Instead of using strong acids (which oxidise and damage the geometrical topology of graphene), we have used alkaline solution (KOH dissolved in water) as electrolyte. TEM analysis shows that as prepared graphene has 1-4 layers and large lateral size (up to ~18μm). Raman analysis shows a unique feature. The D peak which is invariably present in graphene is absent here. This suggests that disorder in the graphene sheets synthesized by the present method, is nearly absent. A tentative mechanism of electrochemical exfoliation in alkaline electrolyte is discussed and described. *Corresponding authors: email- heponsphy@gmail.com, shaz2001in@yahoo.com Telephone: 0542-2368468PDF Image | Synthesis Graphene Electrochemical Exfoliation of Graphite
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