Journal
SYNTHETIC METALS
Volume 194, Issue -, Pages 52-58Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.synthmet.2014.04.012
Keywords
Co3O4; Reduced graphene oxide; Nanocubes; Electromagnetic absorption
Funding
- China Postdoctoral Science Foundation [2013M531233]
- National Science and Technology Major Project [2011ZX02707]
- National Natural Science Foundation of China [11104303, 11274333, 11204339, 61136005, 51002069]
- Chinese Academy of Sciences [KGZD-EW-303, XDA02040000, XDB04010500]
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The Co3O4 nanocube/reduced graphene oxide (Co3O4/RGO) composite paper has been firstly fabricated via a simple process. Several analytical techniques including X-ray diffraction (XRD), Raman spectroscopy, thermogravimetric analysis (TGA), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) have been employed to characterize the Co3O4/RGO composite. The results indicated that the Co3O4 nanocubes attached to the RGO sheets, and that the average edge length of Co3O4 nanocubes is about 200 nm. The obtained composite exhibited a maximum reflection loss of -32.3 dB at 12A GHz with a coating layer thickness of 2.5 mm, and the effective absorption bandwidth with reflection loss less than -10 dB is up to 10.5 GHz (from 5.5 to 16.0 GHz) when an appropriate absorber thickness between 2 and 5 mm is chosen. Such high microwave absorption composite can be used as promising candidate for the new type of electromagnetic wave absorptive material. (C) 2014 Elsevier B.V. All rights reserved.
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