Kereskedelmi TIO2 fotokatalizátorok, arany nanoketrecekkel való módosítása és aktivitására való hatása

Tóth, Zsejke Réka and Pap, Zsolt and Hernádi, Klára and Baia, Lucian and Kovács, Gábor: Kereskedelmi TIO2 fotokatalizátorok, arany nanoketrecekkel való módosítása és aktivitására való hatása. Proceedings of the International Symposium on Analytical and Environmental Problems, (22). pp. 430-434. (2016)

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Abstract

Modified TiO2-based composite photocatalysts were applied in order to degrade phenol and oxalic acid model pollutants. As co-catalysts noble metal nanoparticles (Ag nanoparticles and Au nanocages) were deposited onto the base photocatalysts. The Au nanocages were obtained by both a direct and an indirect synthesis approach, while the composites were fabricated by using either in-situ or impregnation techniques for noble metal deposition. The obtained Au/TiO2 and Ag/TiO2 composites were characterized by different methods, such as XRD (X-ray Diffraction), TEM (Transmission Electron Microscopy), DRS (Diffuse Reflectance Spectroscopy) and XRF (X-ray fluorescence). The result of our research is that the amount of oxalic acid was lower in case of silver nanoparticles, similarly in the case of phenol degradation to the silver nanoparticles/TiO2 composites were more active. The gold nanocages composites low conversion value is due to the intermediates adsorption on the surface of TiO2.

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