<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">Ammonia-modified TiO2 (TiO2/N), prepared in a pressure reactor was used as the well- active and longlife photocatalyst for the azo dye (Reactive Red 198) decomposition. The effect of aeration and the different value of the pH of the reaction medium on the photocatalytic degradation of Reactive Red 198 in water has been investigated. It has been reported that the degradation is greatly influenced by the reaction pH and the faster decomposition of azo dye took place at pH 3.5. When the solution was acidic, a larger amount of azo dye on the positively charged surface of TiO2 photocatalysts was adsorbed. From the obtained results it can be seen that the effectiveness of the decolourisation of the solution was faster by using the nitrogen-modified TiO2.</abstract>

Ammonia-modified TiO2 (TiO2/N), prepared in a pressure reactor was used as the well- active and longlife photocatalyst for the azo dye (Reactive Red 198) decomposition. The effect of aeration and the different value of the pH of the reaction medium on the photocatalytic degradation of Reactive Red 198 in water has been investigated. It has been reported that the degradation is greatly influenced by the reaction pH and the faster decomposition of azo dye took place at pH 3.5. When the solution was acidic, a larger amount of azo dye on the positively charged surface of TiO2 photocatalysts was adsorbed. From the obtained results it can be seen that the effectiveness of the decolourisation of the solution was faster by using the nitrogen-modified TiO2.

TiO2 modified by ammonia as a long lifetime photocatalyst for dyes decomposition

Institute of Chemical and Environment Engineering, Department of Water Technology and Environment Engineering, West Pomeranian University of Technology, ul. Pułaskiego 10, 70-322 Szczecin, Poland

Department of Sanitary Engineering, West Pomeranian University of Technology, al. Piastów 50, 70-310 Szczecin, Poland

Polish Journal of Chemical Technology

TiO modified by ammonia as a long lifetime photocatalyst for dyes decomposition

Ammonia-modified TiO2 (TiO2/N), prepared in a pressure reactor was used as the well- active and longlife photocatalyst for the azo dye (Reactive Red 198)...

TiO₂ modified by ammonia as a long lifetime photocatalyst for dyes decomposition

Published Online: Jan 08, 2010

Page range: 1 - 6

DOI: https://doi.org/10.2478/v10026-009-0035-9

Keywords
photocatalysis, nitrogen-modified TiO, lifetime

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