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| Description
| - The current scientific interest and fervour in graphene research is fuelled by their potential uses in a variety of fields such as energy storage, electrochemical and biomolecule sensing applications. In particular, many of these require the bulk production of graphene materials, using approaches such as the oxidation of graphite to graphite oxide with chlorate or manganate oxidants in the presence of strong acids. This is followed by its reduction via thermal exfoliation, or through chemical and electrochemical reduction methods. Elemental potassium is a very strong reducing agent with a chemical potential of ca. E = -2.93 V versus the standard hydrogen electrode. Therefore, in this paper we evaluate the effects of the presence of elemental potassium as a strong reductant during the thermal exfoliation of graphite oxides. We employ both the Hofmann and Hummers methods of graphite oxidation, followed by their thermal reduction at 500 degrees C both in the absence and presence of elemental potassium. Collectively, these treatments invariably result in differences in morphologies, defect densities and the quantities of oxygen-containing groups within these materials, thus affecting their heterogeneous electron transfer rates and electrochemistry. Extensive analyses with SEM, Raman spectroscopy, high resolution XPS, energy-dispersive X-ray spectroscopy, powder XRD, BET surface area analysis, combustible elemental analysis and cyclic voltammetry (CV) are performed to elucidate the different properties and characteristics of our materials. Obtained results would therefore have important implications in our understanding of oxygen-containing groups in graphene materials and their influence on their inherent electrochemistry
- The current scientific interest and fervour in graphene research is fuelled by their potential uses in a variety of fields such as energy storage, electrochemical and biomolecule sensing applications. In particular, many of these require the bulk production of graphene materials, using approaches such as the oxidation of graphite to graphite oxide with chlorate or manganate oxidants in the presence of strong acids. This is followed by its reduction via thermal exfoliation, or through chemical and electrochemical reduction methods. Elemental potassium is a very strong reducing agent with a chemical potential of ca. E = -2.93 V versus the standard hydrogen electrode. Therefore, in this paper we evaluate the effects of the presence of elemental potassium as a strong reductant during the thermal exfoliation of graphite oxides. We employ both the Hofmann and Hummers methods of graphite oxidation, followed by their thermal reduction at 500 degrees C both in the absence and presence of elemental potassium. Collectively, these treatments invariably result in differences in morphologies, defect densities and the quantities of oxygen-containing groups within these materials, thus affecting their heterogeneous electron transfer rates and electrochemistry. Extensive analyses with SEM, Raman spectroscopy, high resolution XPS, energy-dispersive X-ray spectroscopy, powder XRD, BET surface area analysis, combustible elemental analysis and cyclic voltammetry (CV) are performed to elucidate the different properties and characteristics of our materials. Obtained results would therefore have important implications in our understanding of oxygen-containing groups in graphene materials and their influence on their inherent electrochemistry (en)
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| Title
| - Potassium assisted reduction and doping of graphene oxides: towards faster electron transfer kinetics
- Potassium assisted reduction and doping of graphene oxides: towards faster electron transfer kinetics (en)
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| skos:prefLabel
| - Potassium assisted reduction and doping of graphene oxides: towards faster electron transfer kinetics
- Potassium assisted reduction and doping of graphene oxides: towards faster electron transfer kinetics (en)
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| skos:notation
| - RIV/60461373:22310/13:43895415!RIV14-MSM-22310___
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| http://linked.open...avai/predkladatel
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/60461373:22310/13:43895415
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - SITES; OXIDATION; BIOSENSOR; NANOSHEETS; FUNCTIONALIZATION; AQUEOUS-MEDIA; CARBON NANOTUBES; RAMAN-SPECTROSCOPY; GRAPHITE-ELECTRODES; ELECTROCHEMICAL PROPERTIES (en)
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| http://linked.open.../riv/klicoveSlovo
| |
| http://linked.open...odStatuVydavatele
| - GB - Spojené království Velké Británie a Severního Irska
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Pumera, Martin
- Sofer, Zdeněk
- Poh, Hwee Ling
- Eng, Alex Yong Sheng
- Luxa, Jan
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| http://linked.open...ain/vavai/riv/wos
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| http://linked.open...n/vavai/riv/zamer
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| issn
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| number of pages
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| http://bibframe.org/vocab/doi
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| http://localhost/t...ganizacniJednotka
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