Abstract
Effect of W doping as well as a thermal treatment on the structural and photocatalytic properties of TiO2 produced by flame spray synthesis (FSS) were the subject of investigation. Structural properties were studied by means of X-ray diffraction (XRD), BET adsorption isotherm and transmission electron microscopy (TEM). The surface condition was investigated by X-ray photoelectron spectroscopy (XPS) and differential scanning calorimetry (DSC) and differential thermal and thermogravimetric analysis (DTA-TGA). The photocatalytic properties were studied by optical measurements and photodecomposition of methylene blue under visible irradiation. It was found that the photoactivity in the visible region was enhanced significantly by the W-doping as well as by additional thermal treatment of those nanopowders. The obtained TiO2-W nanopowders exhibited higher performance under visible light than P25.
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Acknowledgements
The authors thank the Polish Ministry of Science and Higher Education for the financial support, project no. R15 019 02 and N N508 1845 33 as well as D. Ferri and K.K. Akurati for the helpful discussions.
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Michalow, K.A., Heel, A., Vital, A. et al. Effect of Thermal Treatment on the Photocatalytic Activity in Visible Light of TiO2-W Flame Spray Synthesised Nanopowders. Top Catal 52, 1051–1059 (2009). https://doi.org/10.1007/s11244-009-9256-7
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DOI: https://doi.org/10.1007/s11244-009-9256-7