Azo dyes decomposition on new nitrogen-modified anatase TiO2 with high adsorptivity.

New vis active photocatalyst was obtained by the modification of commercial anatase TiO2 (Police, Poland) in pressure reactor in an ammonia water atmosphere at 100 degrees C for 4h. The photocatalytic activity of new material was tested during three azo dyes decomposition: monoazo (Reactive Read), diazo (Reactive Black) and poliazodye (Direct Green). Obtained photocatalyst had new bands at 1430-1440 cm(-1) attributed to the bending vibrations of NH(4)(+) and at 1535 cm(-1) associated with NH(2) groups or NO(2) and NO.