<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml">The preparation method and the activity of the TiO2-P25/N doped photocatalyst based on commercial titanium dioxide (TiO2 Aeroxide® P-25 Degussa, Germany) are presented. For the TiO2-P25/N preparation TiO2-P25 and gaseous ammonia were kept in a pressure reactor (10 bars) for 4 hours at the temperature of 200°C. This modification process changed the chemical structure of the TiO2 surface. The formation of NH4+ groups was confirmed by the FTIR measurements. Two bands in the range of ca. 1430 - 1440 cm-1 attributed to bending vibrations of NH4+ could be observed on the FTIR spectra of the catalysts modified with ammonia and the band attributed to the hydroxyl groups at 3300 - 3500 cm-1, which were not reduced after N-doping. The photocatalytic activity of the photocatalysts was checked through the decomposition of two dyes under visible light irradiation. The modified TiO2 thus prepared samples were more active than TiO2-P25 for the decomposition of dyes under visible light irradiation.</abstract>

The preparation method and the activity of the TiO2-P25/N doped photocatalyst based on commercial titanium dioxide (TiO2 Aeroxide® P-25 Degussa, Germany) are presented. For the TiO2-P25/N preparation TiO2-P25 and gaseous ammonia were kept in a pressure reactor (10 bars) for 4 hours at the temperature of 200°C. This modification process changed the chemical structure of the TiO2 surface. The formation of NH4+ groups was confirmed by the FTIR measurements. Two bands in the range of ca. 1430 - 1440 cm-1 attributed to bending vibrations of NH4+ could be observed on the FTIR spectra of the catalysts modified with ammonia and the band attributed to the hydroxyl groups at 3300 - 3500 cm-1, which were not reduced after N-doping. The photocatalytic activity of the photocatalysts was checked through the decomposition of two dyes under visible light irradiation. The modified TiO2 thus prepared samples were more active than TiO2-P25 for the decomposition of dyes under visible light irradiation.

Dye decomposition on P25 with enhanced adsorptivity

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

Polish Journal of Chemical Technology

{"article-title":"Dye decomposition on P25 with enhanced adsorptivity"}

The preparation method and the activity of the TiO2-P25/N doped photocatalyst based on commercial titanium dioxide (TiO2 Aeroxide® P-25 Degussa, Germany) are...

Dye decomposition on P25 with enhanced adsorptivity

Online veröffentlicht: 02. Juli 2008

Seitenbereich: 11 - 16

DOI: https://doi.org/10.2478/v10026-008-0021-7

Schlüsselwörter
visible-light active photocatalyst, N-doped, titanium dioxide, azo dye

This content is open access.

Dye decomposition on P25 with enhanced adsorptivity

Online veröffentlicht: 02. Juli 2008

Seitenbereich: 11 - 16

DOI: https://doi.org/10.2478/v10026-008-0021-7

Schlüsselwörtervisible-light active photocatalyst, N-doped, titanium dioxide, azo dye

This content is open access.

Schlüsselwörter
visible-light active photocatalyst, N-doped, titanium dioxide, azo dye