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|Title:||Facile and single step synthesis of three dimensional reduced graphene oxide-NiCoO 2 composite using microwave for enhanced electron field emission properties|
Mixed transition metal oxide
Reduced graphene oxide nanosheets
|Abstract:||We report the enhanced field emission properties of three-dimensional (3D) mixed transition metal oxide with reduced graphene oxide nanosheets (rGO-NSs) using a simple and fast synthesis route. The rGO-NSs with different/mixed transition metal oxide (rGO-M x O y ) (M x O y �=�CoO, NiO and NiCoO 2 ) composite has been synthesized for comparative studies for the electron field emission properties. The various rGO-M x O y composite materials were synthesized by microwave irradiation using soild precursor powder. The electron field emission properties were studied for all the samples as rGO-NSs, rGO-CoO, rGO-NiO and 3D rGO-NiCoO 2 composite. It was found that specially, rGO-NiCoO 2 composite shows the enhanced field emission performance due to synergic effect of mixed transition metal oxide as NiCoO 2 nanoparticles with rGO-NSs and also the proper anchoring of NiCoO 2 nanoparticles on rGO-NSs. The attachment of NiCoO 2 mixed transition metal oxide with rGO-NSs exhibited lower turn-on field, lower threshold field, larger field enhancement factor and stable emission current stability as compared with those of the rGO-NSs, rGO-CoO and rGO-NiO composite. The surface microstructural analysis and morphology were probed by XRD, scanning and Raman. We suggest that anchoring of binary metal oxide nanoparticles on rGO-NSs could be exploited for the development of efficient field emitters. � 2017 Elsevier B.V.|
|Appears in Collections:||Research Publications|
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