NOx photocatalytic degradation on gypsum plates modified by TiO2-N,C photocatalysts

Janus, Magdalena; Bubacz, Kamila; Zatorska, Justyna; Kusiak-Nejman, Ewelina; Czyżewski, Adam; Morawski, Antoni W.

doi:10.1515/pjct-2015-0042

Abstract

In presented studies the photocatalytic decomposition of NOx on gypsum plates modified by TiO₂-N,Cphotocatalysts were presented. The gypsum plates were obtained by addition of 10 or 20 wt.% of different types of titanium dioxide, such as: pure TiO₂ and carbon and nitrogen co-modified TiO₂ (TiO₂-N,C) to gypsum. TiO₂-N,C photocatalysts were obtained by heating up the starting TiO₂ (Grupa Azoty Zakłady Chemiczne Police S.A) in the atmosphere of ammonia and carbon at the temperature: 100, 300 i 600ºC. Photocatalyst were characterized by FTIR/DRS, UVVis/DR, BET and XRD methods. Moreover the compressive strength tests of modified gypsum were also done. Photocatalytic activity of gypsum plates was done during NOx decomposition. The highest photocatalytic activity has gypsum with 20 wt.% addition of TiO₂-N,C obtained at 300ºC.

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NOx photocatalytic degradation on gypsum plates modified by TiO2-N,C photocatalysts

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