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dc.contributor.authorSubrahmanyam, K S-
dc.contributor.authorVivekchand, S R C-
dc.contributor.authorGovindaraj, A-
dc.contributor.authorRao, C N R-
dc.identifier.citationJournal of Materials Chemistry 18(13), 1517-1523 (2008)en_US
dc.description.abstractGraphene has been prepared by different methods: pyrolysis of camphor under reducing conditions (CG), exfoliation of graphitic oxide (EG), conversion of nanodiamond (DG) and arc evaporation of SiC (SG). The samples were examined by X-ray diffraction (XRD), transmission electron microscopy, atomic force microscopy, Raman spectroscopy and magnetic measurements. Raman spectroscopy shows EG and DG to exhibit smaller in-plane crystallite sizes, but in combination with XRD results EG comes out to be better. The CG, EG and DG samples prepared by us have BET surface areas of 46, 925 and 520 m(2) g(-1) respectively and exhibit significant hydrogen uptake up to 3 wt%. EG also exhibits a high CO2 uptake (34.7 wt%). Electrochemical redox properties of the graphene samples have been examined in addition to their use in electrochemical supercapacitors. Functionalization of EG and DG through amidation has been carried out with the purpose of solubilizing them in non-polar solvents. Water-soluble graphene has been produced by extensive acid treatment of EG or treatment with polyethylene glycol.en_US
dc.publisherRoyal Society of Chemistryen_US
dc.rights© 2008 The Royal Society of Chemistryen_US
dc.subjectHydrogen Storageen_US
dc.subjectCarbon Nanotubesen_US
dc.titleA study of graphenes prepared by different methods: characterization, properties and solubilizationen_US
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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