Top down method for Synthesis of Highly （自顶向下的方法合成的高）.pdf

Supplementary Material (ESI) for Journal of Materials Chemistry This journal is (c) The Royal Society of Chemistry 2011 Electronic Supplementary Information Top down method for Synthesis of Highly Conducting Graphene by Exfoliation of Graphite Oxide using Focused Solar Radiation Varrla Eswaraiah, Sasidharannair Sasikaladevi Jyothirmayee Aravind and Sundara Ramaprabhu *   Alternative Energy and Nanotechnology Laboratory (AENL), Nanofunctional Materials Technology Center (NFMTC), Department of Physics, Indian Institute of Technology Madras, Chennai 600036 (India) *Email: ramp@iitm.ac.in Table of Contents Synthesis of Graphite Oxide Reduction and exfoliation of Graphite Oxide Figure S1: Power and Temperature profile of the focused solar radiation with respect to time during exfoliation of Graphite oxide. Figure S2: FTIR spectra of (a) G (b) GO and (c) sG. Figure S3: a) FESEM image of sG and (b c) elemental mapping of Carbon (Red dots) and Oxygen (Green dots) Figure S4: Energy dispersive spectra (EDX) of solar graphene (Reduced area scan) Figure S5: Energy dispersive spectra (EDX) of solar graphene (Full area scan) Figure S6: Quantification of atomic carbon and oxygen content analyzed using EDX spectra of sG. Table S1: Power of focused EM radiation at different wavelengths using 90 mm converging lens Table S2: Comparison table of various synthesis methods for the reduction of graphite oxide. Table S3: I /I comparison of graphene prepared by different methods. D G 1    Supplementary Material (ESI) for Journal of Materials Chemistry This journal is (c) The Royal Society of Chemistry 2011 Experimental section 1. Preparation of Graphite Oxide GO was prepared according to Modified Hummers method. SP-1 (Bay Carbon) graphite was used as the starting material. Briefly, graphite was grounded w