UV- and visible light active photocatalysts in solar heterogeneous photocatalysis = UV és látható fénnyel gerjeszthető fotokatalizátorok a napfényt hasznosító heterogén fotokatalízisben

Veréb, Gábor and Gyulavári, Tamás and Virág, Orsolya and Vajda, Krisztina and Pap, Zsolt and Alapi, Tünde and László, Zsuzsanna and Dombi, András and Hernádi, Klára: UV- and visible light active photocatalysts in solar heterogeneous photocatalysis = UV és látható fénnyel gerjeszthető fotokatalizátorok a napfényt hasznosító heterogén fotokatalízisben. Proceedings of the International Symposium on Analytical and Environmental Problems, (23). pp. 56-61. (2017)

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Abstract

In the present study, the photocatalytic efficiencies of 2 doped and 4 non-doped TiO2 photocatalysts were investigated in detail, applying solar- and different artificial irradiations. On one hand, in case of visible light irradiation, doped TiO2-s and rutile TiO2 showed much higher activity compared to Aeroxide P25. On the other hand, non-doped TiO2-s’ activity was much higher in the UV range than the investigated doped TiO2-s’. Since the calculated apparent quantum yields were 1-2 order of magnitudes lower in the visible range, than in the UV range, therefore non-doped titanium-dioxides had higher performance in case of solar light utilization despite the 1 order of magnitude lower quantity of UV photons in the solar light. Consequently, higher visible light activity not necessarily leads to higher performance in case of solar light irradiation. If higher solar light utilization efficiency is the aim during the development of a novel photocatalyst, UV excitability is also a crucial property, and needs to be investigated besides the red-shifted light absorbance and the high visible light activity.

Item Type: Article
Journal or Publication Title: Proceedings of the International Symposium on Analytical and Environmental Problems
Date: 2017
Volume: 23
Page Range: pp. 56-61
ISBN: 978-963-306-563-1
Uncontrolled Keywords: Fotokatalízis és napenergia, Napenergia felhasználása - fotokémia és fotokatalízis
Additional Information: Bibliogr.: 61. p. ; ill. ; összefoglalás angol nyelven
Date Deposited: 2018. Dec. 14. 08:20
Last Modified: 2018. Dec. 14. 08:20
URI: http://acta.bibl.u-szeged.hu/id/eprint/56155

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