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Ceramics International, vol.38, no.5, pp.4201-4208, 2012 (SCI-Expanded)
Undoped and Mg doped ZnO nanofibers with different doping concentrations were successfully synthesized using the electrospinning technique. The nanofiber structures were calcined at 300°C, 400°C, 500°C, and 600°C respectively. It was observed that the nanofibers turned into a nanoparticular structure at the calcining temperature of 400°C. The nanoceramic mats were characterized by the Fourier transform infrared-attenuated total reflectance spectroscopy and by the scanning electron microscopy. The electronic band transitions of as-deposited and calcined films were identified by the evaluation of the photoluminescence measurements at room temperature. It was observed that the exitonic transition energy of the ZnO nanostructure blue-shifted to a high energy value with an increasing Mg doping ratio. In order to estimate the decomposition temperature of the nanofibers turning into a nanoparticular structure, the nanofiber structure was calcined at temperatures between 300°C and 400°C, the temperature ramp being 20°C. The evaluation of the emission spectra of the calcined structures show that the decomposition of electrospun nanofibers started at 320°C. In addition, band gap energies of the samples were determined by the transmittance measurement of the samples and by the UV-VIS spectrophotometer at the room temperature. © 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved.