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Title: Synthesis of graphene platelets by chemical and electrochemical route

Graphical abstract: A schematic showing the overall reduction process of graphite to reduced graphene platelets by chemical and electrochemical route. - Highlights: • Graphene was prepared by diverse routes viz. chemical and electrochemical methods. • NaBH{sub 4} was effective for removing oxygen functional groups from graphene oxide. • Sodium borohydride reduced graphene oxide (SRGO) showed high specific capacitance. • Electrochemical rendered a cheap route for production of graphene in powder form. - Abstract: Graphene platelets were synthesized from graphene oxide by chemical and electrochemical route. Under the chemical method, sodium borohydride and hydrazine chloride were used as reductants to produce graphene. In this paper, a novel and cost effective electrochemical method, which can simplify the process of reduction on a larger scale, is demonstrated. The electrochemical method proposed in this paper produces graphene in powder form with good yield. The atomic force microscopic images confirmed that the graphene samples prepared by all the routes have multilayers of graphene. The electrochemical process provided a new route to make relatively larger area graphene sheets, which will have interest for further patterning applications. Attempt was made to quantify the quantum of reduction using cyclic voltammetry and choronopotentiometry techniques on reduced graphene samples. Asmore » a measure in reading the specific capacitance values, a maximum specific capacitance value of 265.3 F/g was obtained in sodium borohydride reduced graphene oxide.« less
Authors:
;  [1] ;  [2] ;  [1] ;  [3] ;  [4] ;  [1] ;  [5]
  1. Centre for Nanotechnology Research, VIT University, Vellore 632014, Tamil Nadu (India)
  2. Materials Physics Division, School of Advanced Sciences, VIT University, Vellore 632014, Tamil Nadu (India)
  3. (Materials), Renault Nissan Technology and Business Center India (P) Ltd., Chennai, Tamil Nadu (India)
  4. Climate Change Technology Research Division, Korea Institute of Energy Research, Yuseong-gu, Daejeon 305-343 (Korea, Republic of)
  5. (Korea, Republic of)
Publication Date:
OSTI Identifier:
22285112
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 48; Journal Issue: 10; Other Information: Copyright (c) 2013 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ATOMIC FORCE MICROSCOPY; CAPACITANCE; ELECTROCHEMISTRY; ENERGY STORAGE; GRAPHENE; GRAPHITE; NANOSTRUCTURES; OXIDES; SODIUM; SYNTHESIS; VOLTAMETRY