Journal
MATERIALS & DESIGN
Volume 122, Issue -, Pages 110-117Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.matdes.2017.02.089
Keywords
Reduced graphene oxide; Pd nanoparticles; Pd-CNTs-rGO composites; Microwave treatment; Field emission properties
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Funding
- CNPq (Brazil)
- FAPESP (Brazil)
- Conicyt (Fondecyt) Chile [1151527]
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We report the synthesis of palladium-graphene oxide based (Pd-rGO) composite and its enhanced electron field emission studies. The palladium nanoparticles decorated reduced graphene oxide (Pd-NPs-rGO) and Pd catalyst assisted grown CNTs on reduced graphene oxide (Pd-CNTs-rGO) composite have been synthesized employing microwave. The hierarchical Pd-CNTs-rGO composite shows enhanced field emission performance due to the synergestic effect of Pd catalyst assisted grown CNTs on rGO nanosheets (rGO-NSs) and its proper contact on rGO surfaces. The enhanced field emission behavior of Pd-CNTs-rGO composite is attributed to the easy electron tunneling from the one-dimensional CNTs, which increases the emission sites and hence the field emission current density. The Pd-CNTs-rGO composite exhibits lower turn-on field, lower threshold field, larger field enhancement factor and high emission current stability as compared to Pd-NPs-rGO composite. (C) 2017 Elsevier Ltd. All rights reserved.
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