Abstract
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 200nm. The obtained composite exhibited a maximum reflection loss of −32.3dB at 12.4GHz with a coating layer thickness of 2.5mm, and the effective absorption bandwidth with reflection loss less than −10dB is up to 10.5GHz (from 5.5 to 16.0GHz) when an appropriate absorber thickness between 2 and 5mm is chosen. Such high microwave absorption composite can be used as promising candidate for the new type of electromagnetic wave absorptive material.
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