Synthesis and formation mechanism of TiO2/Al2O3 nanobelts by electrospinning |
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Authors: | Chao Song Xiangting Dong |
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Affiliation: | 1. School of Chemistry and Environmental Engineering, Changchun University of Science and Technology, Changchun, 130022, P.R. of China
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Abstract: | Poly(vinyl pyrrolidone) (PVP)/[Ti(SO4)2 + Al(NO3)3] composite nanobelts were prepared via electrospinning technology, and TiO2/Al2O3 nanobelts were fabricated by calcination of the prepared composite nanobelts. The samples were characterized by thermogravimetric-differential thermal analysis (TG-DTA), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and Scanning electron microscopy (SEM). XRD results show that the composite nanobelts were amorphous in structure, and pure phase TiO2/Al2O3 nanobelts were obtained by calcination of the relevant composite nanobelts at 950°C for 8 h. SEM analysis indicates that the surface of as-prepared composite nanobelts was smooth, the widths of the composite fibers were in narrow range, and the mean width was ca. 8.9 ± 2.1 μm, thickness was about 255 nm, and there is no cross-linking among nanobelts. The width of TiO2/Al2O3 nanobelts was ca. 1.3 ± 0.1 μm and the thickness was about 105 nm. TG-DTA analysis reveals that the N,N-dimethylformamide (DMF), organic compounds and inorganic salts in the composite nanobelts were decomposed and volatilized totally, and the weight of the sample kept constant when sintering temperature was above 900°C, and the total weight loss percentage was 81%. FTIR analysis manifests that crystalline TiO2/Al2O3 nanobelts were formed at 950°C. The possible formation mechanism of the TiO2/Al2O3 nanobelts was preliminarily discussed. |
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