期刊
NANOMATERIALS
卷 8, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/nano8030179
关键词
SiO2 nanowires; TiO2 nanowires; bimodal nanowires; electrospinning; Zol-gel method; optical properties
类别
资金
- National Science Centre, Poland [2014/15/B/ST8/04767]
- Silesian University of Technology [10/00/RGP17/0182]
- National Science Centre, Poland [2014/15/B/ST8/04767]
- Silesian University of Technology [10/00/RGP17/0182]
The purpose of this paper was to produce SiO2 and TiO2 nanowires via the electrospinning process from a polyvinylpyrrolidone (PVP)/Tetraethyl orthosilicate (TEOS)/Titanium (IV) butoxide (TNBT)/dimethylformamide (DMF) and ethanol (EtOH) solution. The as-obtained nanofibers were calcined at temperatures ranging from 400 degrees C to 600 degrees C in order to remove the organic phase. The one-dimensional ceramic nanostructures were studied using a scanning electron microscope (SEM) and a transmission electron microscope (TEM) to analyze the influence of the used temperature on the morphology and structures of the obtained ceramic nanomaterials. In order to examine the chemical structure of the nanowires, energy dispersive spectrometry (EDX) and Fourier-Transform Infrared spectroscopy (FTIR) were used. The optical property analysis was performed on the basis of UV-Vis spectra of absorbance as a function of the wavelength. Using the modified Swanepoel method, which the authors proposed and the recorded absorbance spectra allowed to determine the banded refractive index n, real n' and imaginary k part of the refractive index as a function of the wavelength, complex dielectric permeability epsilon, and real and imaginary part epsilon(r) and epsilon(i) of the dielectric permeability as a function of the radiation energy of the produced ceramic nanowires.
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