6533b7cffe1ef96bd1258cbb
RESEARCH PRODUCT
High activity of brookite TiO2 nanoparticles in the photocatalytic abatement of ammonia in water
Leonardo PalmisanoGian Luca ChiarelloAgatino Di PaolaMaria Vittoria DozziElena SelliMarco Altomaresubject
ChemistryBrookiteInorganic chemistryGeneral ChemistryCrystal structureCatalysisCatalysisColloidAmmoniachemistry.chemical_compoundvisual_artvisual_art.visual_art_mediumPhotocatalysisSurface modificationSelectivitydescription
Abstract The effects of the TiO 2 crystal structure and its surface modification with Pt nanoparticles on the photocatalytic oxidation of NH 3 in the aqueous phase were studied with home-made TiO 2 photocatalyst powders synthesized by a thermo-hydrolysis approach that allowed a fine control of the crystallographic phase composition. Ammonia conversion and the selectivity toward mildly oxidized N 2 and highly oxidized nitrite and nitrate anions were monitored during the runs. Pure brookite powders modified by Pt nanoparticles, deposited either from a colloidal suspension or by deposition–precipitation, were found to be the most efficient photocatalysts in NH 3 degradation, with a desired good selectivity toward innocuous N 2 . The photo-activity in NH 3 oxidation was correlated to the crystallographic features of the investigated TiO 2 -based materials, also taking into account the effects induced on the reaction paths by the presence of Pt nanoparticles on TiO 2 .
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2015-09-01 | Catalysis Today |