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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
materials science
Silicon nanowire arrays-induced graphene oxide reduction under UV irradiation
Nanoscale, Volume 3, No. 11, Year 2011
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Description
This paper reports on efficient UV irradiation-induced reduction of exfoliated graphene oxide. Direct illumination of an aqueous solution of graphene oxide at λ = 312 nm for 6 h resulted in the formation of graphene nanosheets dispersible in water. X-Ray photoelectron spectroscopy (XPS), UV-vis spectroscopy, atomic force microscopy (AFM) and electrochemical measurements (cyclic voltammetry and electrochemical impedance spectroscopy) suggest a restoration of the sp 2 carbon network. The results were compared with graphene nanosheets prepared by photochemical irradiation of a GO aqueous solution in the presence of hydrogenated silicon nanowire (SiNW) arrays or silicon nanowire arrays decorated with silver (SiNW/Ag NPs) or copper nanoparticles (SiNW/Cu NPs). Graphene nanosheets obtained by illumination of the GO aqueous solution at 312 nm for 6 h in the presence of SiNW/Cu NPs exhibited superior electrochemical charge transfer characteristics. This is mainly due to the higher amount of sp 2-hybridized carbon in these graphene sheets found by XPS analysis. The high level of extended conjugated carbon network was also evident by the water insoluble nature of the resulting graphene nanosheets, which precipitated upon photochemical reduction. © 2011 The Royal Society of Chemistry.
Authors & Co-Authors
Fellahi, Ouarda
France, Lille
Université de Lille
France, Villeneuve-d'ascq
Institut D'electronique de Microélectronique et de Nanotechnologie Iemn
Algeria, Algiers
Centre de Recherche en Technologie Des Semi-conducteurs Pour L’energétique
Das, Manash R.
India, Jorbat
North East Institute of Science and Technology, Jorhat
Coffinier, Yannick
France, Lille
Université de Lille
France, Villeneuve-d'ascq
Institut D'electronique de Microélectronique et de Nanotechnologie Iemn
Szunerits, Sabine
France, Lille
Université de Lille
France, Villeneuve-d'ascq
Institut D'electronique de Microélectronique et de Nanotechnologie Iemn
Hadjersi, Toufik
Algeria, Algiers
Centre de Recherche en Technologie Des Semi-conducteurs Pour L’energétique
Maamache, Mustapha
Algeria, Setif
Université Ferhat Abbas Sétif 1
Boukherroub, Rabah
France, Lille
Université de Lille
France, Villeneuve-d'ascq
Institut D'electronique de Microélectronique et de Nanotechnologie Iemn
Statistics
Citations: 71
Authors: 7
Affiliations: 5
Identifiers
Doi:
10.1039/c1nr10970g
ISSN:
20403364
e-ISSN:
20403372
Research Areas
Environmental