In:
PJCT, Walter de Gruyter GmbH, Vol. 10, No. 2 ( 2008-1-1), p. 11-16
Abstract:
The preparation method and the activity of the TiO 2 -P25/N doped photocatalyst based on commercial titanium dioxide (TiO 2 Aeroxide® P-25 Degussa, Germany) are presented. For the TiO 2 -P25/N preparation TiO 2 -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 TiO 2 surface. The formation of NH 4 + groups was confirmed by the FTIR measurements. Two bands in the range of ca. 1430 - 1440 cm -1 attributed to bending vibrations of NH 4 + 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 TiO 2 thus prepared samples were more active than TiO 2 -P25 for the decomposition of dyes under visible light irradiation.
Type of Medium:
Online Resource
ISSN:
1899-4741
,
1509-8117
DOI:
10.2478/v10026-008-0021-7
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2008
detail.hit.zdb_id:
2402116-7
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