Paramagnetic and Photocatalytic Properties of C-S co-Doped TiO2 Nanocatalysts

Authors M.V. Bondarenko1, T.A. Khalyavka1, A.K. Melnyk1, S.V. Camyshan1, Ya.V. Panasuk2

1Institute for Sorption and Problems of Endoecology NAS of Ukraine, 13, General Naumov Str., 03164 Kyiv, Ukraine

2L.V. Pisarzhevskii Institute of Physical Chemistry NAS of Ukraine, 31, Nauky Prosp., 03028 Kyiv, Ukraine

Issue Volume 10, Year 2018, Number 6
Dates Received 28 July 2018; revised manuscript received 07 December 2018; published online 18 December 2018
Citation M.V. Bondarenko, T.A. Khalyavka, A.K. Melnyk, et al. J. Nano- Electron. Phys. 10 No 6, 06039 (2018)
PACS Number(s) 82.50.Hp, 76.30.Da
Keywords Titanium dioxide (4) , Carbon (56) , Sulphur, Nanocomposites (9) , ESR spectroscopy, Photocatalysis (4) .

The paramagnetic and photocatalytic properties of C-S co-doped TiO2 nanocatalysts were investigated. It was established, that the carbon-doped catalysts with different sulfur content show the presence of paramagnetic centers, referred to the dangling bonds in graphitized structures, intensities of this lines were drastically lowered after photocatalytic reaction. The ESR signals from Ti3+ centers were not detected. It was showed, that the light excitation of samples, regardless of doping (type and quantity), in the absorption band did not lead to the appearance of luminescence, so the recombination of charges occurs only in a non-radiation way, part of which reveals in photocatalysis, while the other part of the charges is captured/deactivated by defects/traps. Composite samples showed enhancement of the photocatalytic activity in the destruction of safranine T under UV irradiation as compared to pure TiO2.

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