01393nas a2200241   4500008004100000022001400041245012700055210006900182260011000251300001400361490000700375520044900382100002400831700002000855700001700875700002000892700001700912700002500929700001800954700002300972700002500995856013101020       2011                        eng d  a1463-926200aFrom graphite oxide to highly water dispersible functionalized graphene by single step plant extract-induced deoxygenation0 aFrom graphite oxide to highly water dispersible functionalized g  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcJUL  a1990-19960 v133 a<p>We report a single step facile synthesis of highly water dispersible functionalized graphene nanosheets by plant extract-induced deoxygenation of graphite oxide (GO). The results of various characterizations reveal that the properties of such plant extract-converted graphene nanosheets (PCGN) are comparable to chemically converted graphene nanosheets (CCG). These results open a green route to the emerging graphene-based technologies.</p>1 aMhamane, Dattakumar1 aRamadan, Wegdan1 aFawzy, Manal1 aRana, Abhimanyu1 aDubey, Megha1 aRode, Chandrashekhar1 aLefez, Benoit1 aHannoyer, Beatrice1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/graphite-oxide-highly-water-dispersible-functionalized-graphene-single-step-plant-extract-001896nas a2200265   4500008004100000022001400041245012500055210006900180260010600249300001200355490000800367520090000375653001001275653002201285653001601307653001901323100002201342700002401364700002101388700001901409700002701428700002501455700002401480856012601504       2014                        eng d  a0013-468600aIndanthrone derived disordered graphitic carbon as promising insertion anode for sodium ion battery with long cycle life0 aIndanthrone derived disordered graphitic carbon as promising ins  aTHE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLANDbPERGAMON-ELSEVIER SCIENCE LTDcNOV  a218-2230 v1463 a<p>We report facile, one step synthesis of disordered graphitic carbon by high temperature (1000 degrees C) pyrolysis of indanthrone dye (ID). The pyrolysed carbon is disordered in nature and the same is clearly evidenced by various analytical techniques like X-ray diffraction, Raman spectroscopy and high resolution transmission electron microscopy. Na-insertion properties of such indanthrone dye derived disordered graphitic carbon (IDDGC) is evaluated in half-cell assembly (Na/IDDGC). The test cell delivered a reversible capacity of similar to 160 mAh g(-1) at current density of 25 mAg 1. In addition, excellent cycling profiles are noted for such IDDGC, which retains 67% of initial reversible capacity after 500 cycles. The present study clearly highlights the importance of disorder in the graphitic carbon for efficient Na-ion storage. (C) 2014 Elsevier Ltd. All rights reserved.</p>10aanode10adisordered carbon10aindanthrone10aNa-ion battery1 aSuryawanshi, Anil1 aMhamane, Dattakumar1 aNagane, Satyawan1 aPatil, Shankar1 aAravindan, Vanchiappan1 aOgale, Satishchandra1 aSrinivasan, Madhavi  uhttps://library.ncl.res.in/content/indanthrone-derived-disordered-graphitic-carbon-promising-insertion-anode-sodium-ion-001250nas a2200217   4500008004100000022001400041245016800055210006900223260000800292300001600300490000600316520043000322100002200752700002200774700002400796700001900820700001900839700001900858700002500877856013000902       2014                        eng d  a2040-336400aLarge scale synthesis of graphene quantum dots (GQDs) from waste biomass and their use as an efficient and selective photoluminescence on-off-on probe for Ag+ ions0 aLarge scale synthesis of graphene quantum dots GQDs from waste b  cMAR  a11664-116700 v63 a<p>Graphene quantum dots (GQDs) are synthesized from bio-waste and are further modified to produce amine-terminated GQDs (Am-GQDs) which have higher dispersibility and photoluminescence intensity than those of GQDs. A strong fluorescence quenching of Am-GQDs (switch-off) is observed for a number of metal ions, but only for the Ag+ ions is the original fluorescence regenerated (switch-on) upon addition of L-cysteine.</p>
1 aSuryawanshi, Anil1 aBiswal, Mandakini1 aMhamane, Dattakumar1 aGokhale, Rohan1 aPatil, Shankar1 aGuin, Debanjan1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/large-scale-synthesis-graphene-quantum-dots-gqds-waste-biomass-and-their-use-efficient-and01433nas a2200205   4500008004100000022001400041245012600055210006900181260011000250300001600360490000600376520058500382100001900967700002000986700002401006700002201030700002601052700002501078856012401103       2014                        eng d  a2046-206900aSurfactant free gram scale synthesis of mesoporous Ni(OH)(2)-r-GO nanocomposite for high rate pseudocapacitor application0 aSurfactant free gram scale synthesis of mesoporous NiOH2rGO nano  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcAUG  a39875-398830 v43 a<p>We report a single-step surfactant-free gram scale hydrothermal synthesis of mesoporous Ni(OH)(2) nanoparticles and the Ni(OH)(2)-reduced graphene oxide (Ni(OH)(2)-r-GO) nanocomposite. Interesting morphological features are noted. These nanomaterials are examined and compared as cathode materials for pseudo-capacitor application through detailed characterizations. A high specific capacitance (C-s) of 1538 F g(-1) is observed for Ni(OH)(2)-r-GO even at a high current density of 40 A g(-1), whereas at the same current rate, bare Ni(OH)(2) shows C-s of only 936 F g(-1).</p>1 aSingh, Upendra1 aBanerjee, Abhik1 aMhamane, Dattakumar1 aSuryawanshi, Anil1 aUpadhyay, Kush, Kumar1 aOgale, Satishchandra  uhttps://library.ncl.res.in/content/surfactant-free-gram-scale-synthesis-mesoporous-nioh2-r-go-nanocomposite-high-rate-002258nas a2200229   4500008004100000022001400041245010600055210006900161260011000230300001400340490000600354520135600360100001401716700002401730700002201754700002201776700001901798700002501817700002501842700002901867856013201896       2014                        eng d  a2044-475300aTriple nanocomposites of CoMn2O4, Co3O4 and reduced graphene oxide for oxidation of aromatic alcohols0 aTriple nanocomposites of CoMn2O4 Co3O4 and reduced graphene oxid  aTHOMAS GRAHAM HOUSE, SCIENCE PARK, MILTON RD, CAMBRIDGE CB4 0WF, CAMBS, ENGLANDbROYAL SOC CHEMISTRYcMAY  a1771-17780 v43 a<p>A composite of reduced graphene oxide (RGO) with oxides of manganese and cobalt together was prepared by a solvothermal method. During synthesis, both the reduction of graphene oxide as well as the growth of nanorod shaped CoMn2O4 and Co3O4 occurred simultaneously having a crystallite size of similar to 8 nm calculated from X-ray diffraction (XRD). The as-obtained triple nanocomposite material designated as RGO-MnCoO exhibited excellent activity for the liquid phase aerobic oxidation of aromatic alcohols under base-free conditions selectively giving the corresponding aldehydes (&gt;85%). RGO loading was varied in the range of 1-10%, among which 1% RGO-MnCoO showed maximum catalytic activity enhancement of 24% as compared to the bare mixed oxide (MnCo-MO) for the oxidation of vanillyl alcohol. HR-TEM of RGO-MnCoO revealed that it was a composite material having uniform nanotubes of similar to 25 nm length and 6 nm diameter with a fringe pattern showing the (103) and (004) planes and lattice spaces of 0.26 nm and 0.22 nm, respectively, for the spinel CoMn2O4. The detailed studies on the morphology, size and composition of the as-prepared RGO-MnCoO nanocomposite by XRD, XPS, N-2-adsorption/desorption and O-2-TPD techniques were used to understand the role of RGO in the enhancement of catalytic activity for oxidation reaction.</p>1 aJha, Ajay1 aMhamane, Dattakumar1 aSuryawanshi, Anil1 aJoshi, Sameer, M.1 aShaikh, Parvez1 aBiradar, Narayan, S.1 aOgale, Satishchandra1 aRode, Chandrashekhar, V.  uhttps://library.ncl.res.in/content/triple-nanocomposites-comn2o4-co3o4-and-reduced-graphene-oxide-oxidation-aromatic-alcohols-001644nas a2200205   4500008004100000245012900041210006900170260000800239300001000247490000800257520088300265100002401148700002701172700001801199700002201217700001601239700002401255700002901279856013001308       2016                        eng d00aGraphene based nanocomposites for alloy (SnO2), and conversion (Fe3O4) type efficient anodes for Li-ion battery applications0 aGraphene based nanocomposites for alloy SnO2 and conversion Fe3O  cJUN  a88-950 v1303 aTwo types of trigol reduced one pot synthesized graphene (TRG) based nanocomposites (SnO2-TRG, and Fe3O4-TRG) are examined as potential anodes for Lithium ion battery (LIB) applications. The two specific systems represent different electrode reaction mechanisms, namely alloying, and conversion respectively. The high resolution transmission electron microscopy (HR-TEM) analysis confirms the uniform distribution of SnO2 (similar to 2 nm), and Fe3O4 (similar to 8 nm) particulates on ultrathin TRG nanosheets and highlights the importance of surfactant free synthesis. The SnO2-TRG, and Fe3O4-TRG exhibited the maximum reversible capacity of similar to 947, and similar to 1024 mA h g(-1), respectively. The results show that such graphene based composite materials can be effectively used as prospective anodes for LIB applications. (C) 2016 Elsevier Ltd. All rights reserved.1 aMhamane, Dattakumar1 aAravindan, Vanchiappan1 aTaneja, Divya1 aSuryawanshi, Anil1 aGame, Onkar1 aSrinivasan, Madhavi1 aOgale, Satishchandra, B.  uhttps://library.ncl.res.in/content/graphene-based-nanocomposites-alloy-sno2-and-conversion-fe3o4-type-efficient-anodes-li-ion