Synthesis of TiO2 Tubes Via Dissolution of TiOSO4 Rod Using H2O2
نویسندگان
چکیده
We demonstrate here for the first time an original and facile approach to preparing titanium oxide (TiO2) tubes using hydrogen peroxide (H2O2) titanyl (IV) oxysulfate (TiOSO4) as sacrificial templates. The method involves dissolving TiOSO4 powder in H2O2 solution subsequently applying thermal treatment on resulting amorphous precipitate. Prepared samples were characterized by X-ray diffraction, scanning electron microscopy (SEM) images, thermogravimetric (TG) analysis, UV-vis analysis. Experimental results indicated that exhibit tube-like structures with lengths of approximately 1.9 mm diameter 11.5 length. Anatase rutile phases formed after annealing at different temperatures air. crystallite size estimated Rietveld refinement showed increase from 34.69 354.28 nm temperature 600 1000 °C. At same time, band gap values decreased 3.14 2.97 eV. density maps calculated, electronic was observed 497.56 e- Å-2 (600 °C) 533.10e- (740 decrease samples. A possible mechanism formation TiO2 proposed.
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ژورنال
عنوان ژورنال: Materials Research-ibero-american Journal of Materials
سال: 2021
ISSN: ['1980-5373', '1516-1439']
DOI: https://doi.org/10.1590/1980-5373-mr-2020-0377