Naslov
Conducting Polymer Polypyrrole and Titanium Dioxide Nanocomposites for Photocatalysis of RR45 Dye under Visible Light

Autori
Kratofil Krehula, Ljerka ; Stjepanović, Jasmina ; Perlog, Martina ; Krehula, Stjepko ; Gilja, Vanja ; Hrnjak-Murgić, Zlata ; Travas-Sejdic, Jadranka

Izvornik
Polymer bulletin (0170-0839) 76 (2019), 4; 1697-1715

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
polypyrrole ; titanium dioxide ; nanocomposite ; photocatalysis ; visible light

Sažetak
The interest is given on the preparation of nanocomposites of titanium dioxide (TiO2) with conducting polymer polypyrrole (PPy) because the resulting composites possess enhanced photocatalytic activity under visible light in comparison to pure TiO2 photocatalyst. In such composite there is a synergistic activity of the components. It is very important to optimize the synthesis conditions in order to obtain PPy/TiO2 composites with the optimal thickness of conductive polymer layer on TiO2 and minimal possible aggregation of particles. PPy/TiO2 composites were characterized by Fourier transform infrared spectroscopy (FTIR), X-ray powder diffraction (XRD), UV-Vis spectroscopy, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The photocatalytic efficiency of the samples was determined by following the decomposition of Reactive Red 45 (RR 45) dye under UV and visible light, which was monitored by UV-Vis spectroscopy (as a change in absorbance of wavelength at 542 nm). The results show enhanced photocatalytic efficiency of the samples under visible light.

Izvorni jezik
Engleski

Znanstvena područja
Kemija, Kemijsko inženjerstvo, Interdisciplinarne tehničke znanosti

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