Facile Synthesis and Characterization of Graphene Nanosheets

Wang, Guoxiu; Yang, Juan; Park, Jinsoo; Gou, Xinglong; Wang, Bei; Liu, Hao; Yao, Jane

doi:10.1021/jp710931h

Cited by 1,987 publications

(1,126 citation statements)

References 23 publications

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“…To date, many reduction reagents, such as sodium hydride 10 , hydrogen sulphide 11 , hydrazine 12 , NaBH 4 (ref. 13), dimethylhydrazine 14 , hydroquinone 15 , the sequential use of NaBH 4 and H 2 SO 4 (ref. 16), and aluminium powder 17 , have been used to reduce GO to produce RGO in the solution phase.…”

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confidence: 99%

A low-temperature method to produce highly reduced graphene oxide

et al. 2013

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Chemical reduction of graphene oxide can be used to produce large quantities of reduced graphene oxide for potential application in electronics, optoelectronics, composite materials and energy-storage devices. Here we report a highly efficient one-pot reduction of graphene oxide using a sodium-ammonia solution as the reducing agent. The solvated electrons in sodium-ammonia solution can effectively facilitate the de-oxygenation of graphene oxide and the restoration of p-conjugation to produce reduced graphene oxide samples with an oxygen content of 5.6 wt%. Electrical characterization of single reduced graphene oxide flakes demonstrates a high hole mobility of 123 cm 2 Vs À 1 . In addition, we show that the pre-formed graphene oxide thin film can be directly reduced to form reduced graphene oxide film with a combined low sheet resistance (B350 O per square with B80% transmittance). Our study demonstrates a new, low-temperature solution processing approach to high-quality graphene materials with lowest sheet resistance and highest carrier mobility.

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confidence: 99%

A low-temperature method to produce highly reduced graphene oxide

et al. 2013

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“…The preparation of graphene from graphene oxide has been achieved via the Hummers method [4] with a reducing agent such as hydrazine [5,6], hydroquinone [7], sodium borohydride (NaBH 4 ) [8], or ascorbic acid (LAA) [9]. Alternatively reduction has been induced thermally [6], or through the use of sulphur-containing compounds [10] or bacteria [11].…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of reduced graphene oxide/MWNTs nanocomposite supercapacitor materials tested as electrophoretically deposited films on glassy carbon electrodes

et al. 2013

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. (2013). Facile synthesis of reduced graphene oxide/MWNTs nanocomposite supercapacitor materials tested as electrophoretically deposited films on glassy carbon electrodes. Journal of Applied Electrochemistry, 43 (9), 865-877.Facile synthesis of reduced graphene oxide/MWNTs nanocomposite supercapacitor materials tested as electrophoretically deposited films on glassy carbon electrodes AbstractThis paper reports on a facile synthesis method for reduced graphene oxide (rGO)/multi-walled carbon nanotubes (MWNTs) nanocomposites. The initial step involves the use of graphene oxide to disperse the MWNTs, with subsequent reduction of the resultant graphene oxide/MWNTs composites using l-ascorbic acid (LAA) as a mild reductant. Reduction by LAA preserves the interaction between the rGO sheets and MWNTs. The dispersion-containing rGO/MWNTs composites was characterized and electrophoretically deposited anodically onto glassy carbon electrodes to form high surface area films for capacitance testing. Pseudo capacitance peaks were observed in the rGO/MWNTs composite electrodes, resulting in superior performance with capacitance values up to 134.3 F g-1 recorded. This capacitance value is higher than those observed for LAA-reduced GO (LAA-rGO) (63.5 F g-1), electrochemically reduced GO (EC-rGO) (27.6 F g-1), or electrochemically reduced GO/MWNTs (EC-rGO/MWNTs) (98.4 F g-1)-based electrodes. AbstractThis paper reports on a facile synthesis method for reduced graphene oxide (rGO)/multi-

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“…Moreover, a low-temperature process below the glass transition temperature is essential for flexible device fabrication on plastic substrates. Until now, the chemical reduction of G-O has entailed the use of hydrogen sulphide 1 , hydrazine 2 , NaBH 4 3 , dimethylhydrazine 4 , hydroquinone 5 , the sequential use of NaBH 4 and H 2 SO 4 6 , and aluminium powder 7 . Such reduction reagents have been reported to achieve a high degree of G-O reduction in the solution phase.…”

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confidence: 99%

Reduced graphene oxide by chemical graphitization

et al. 2010

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Reduced graphene oxides (RG-os) have attracted considerable interest, given their potential applications in electronic and optoelectronic devices and circuits. However, very little is known regarding the chemically induced reduction method of graphene oxide (G-o) in both solution and gas phases, with the exception of the hydrazine-reducing agent, even though it is essential to use the vapour phase for the patterning of hydrophilic G-os on prepatterned substrates and in situ reduction to hydrophobic RG-os. In this paper, we report a novel reducing agent system (hydriodic acid with acetic acid (HI-AcoH)) that allows for an efficient, one-pot reduction of a solution-phased RG-o powder and vapour-phased RG-o (VRG-o) paper and thin film. The reducing agent system provided highly qualified RG-os by mass production, resulting in highly conducting RG-o HI − AcoH . moreover, VRG-o HI − AcoH paper and thin films were prepared at low temperatures (40 °C) and were found to be applicable to flexible devices. This one-pot method is expected to advance research on highly conducting graphene platelets.

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Facile Synthesis and Characterization of Graphene Nanosheets

Cited by 1,987 publications

References 23 publications

A low-temperature method to produce highly reduced graphene oxide

A low-temperature method to produce highly reduced graphene oxide

Facile synthesis of reduced graphene oxide/MWNTs nanocomposite supercapacitor materials tested as electrophoretically deposited films on glassy carbon electrodes

Reduced graphene oxide by chemical graphitization

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