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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 33, Number 4
BKCSDE 33(4)
April 20, 2012 

 
Title
Spectroscopic and Morphological Investigation of Co3O4 Microfibers Produced by Electrospinning Process
Author
J. H. Baek, J. Y. Park, A. R. Hwang, Y. C. Kang*
Keywords
Co oxide microfibers, XPS, Electrospinning, XRD
Abstract
The Co oxide microfibers were synthesized using the electrospinning process and formed Co3O4 microfibers after being calcined at high temperatures. The calcination temperature influenced the diameters, morphology, crystalline phase, and chemical environment of the fibers. The surface morphology of the obtained fibers was examined by using the scanning electron microscope (SEM). As the calcination temperatures increased from room temperature to 873 and 1173 K, the diameters of the cobalt oxide fibers decreased from 1.79 to 0.82 and 0.32 mm, respectively. The structure of the fibers was investigated with X-ray diffraction (XRD) and transmission electron microscopy (TEM). The calcined Co3O4 fibers had crystalline face-centered cubic (fcc) structure. The X-ray photoelectron spectroscopy (XPS) results revealed that increasing the calcination temperature promoted the formation of Co2+ and Co3+ species.
Page
1242 - 1246
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