6533b7cffe1ef96bd1258e44
RESEARCH PRODUCT
Preparation and photoactivity of nanocrystalline TiO2 powders obtained by thermohydrolysis of TiOSO4
Luca SamioloA. Di PaolaRossano AmadelliLeonardo PalmisanoMarianna Bellarditasubject
ChemistryScanning electron microscopeInorganic chemistryTitanium dioxide TiOSO4Thermohydrolysis Heterogeneous photocatalysisGeneral ChemistryCatalysisNanocrystalline materiallaw.inventionNOHeterogeneous photocatalysischemistry.chemical_compoundX-ray photoelectron spectroscopylawSpecific surface areaTitanium dioxideThermohydrolysisTitanium dioxideCalcinationTitanium dioxide TiOSO4 Thermohydrolysis Heterogeneous photocatalysisSettore CHIM/07 - Fondamenti Chimici Delle TecnologieElectron paramagnetic resonancePhotodegradationTiOSO4Nuclear chemistrydescription
Nanocrystalline TiO2 photocatalysts were synthesized in mild conditions by thermohydrolysis of TiOSO4 in water at 100 °C and post-calcination treatment at various temperatures. The TiO2 powders were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, specific surface area determinations, scanning electron microscopy and electron paramagnetic resonance measurements. The photoactivity of the samples was tested employing the photodegradation of 4-nitrophenol in liquid–solid regimen and the photooxidation of gaseous 2-propanol. The best results were obtained with the powder calcined at 600 °C for 10 h. Surprisingly, the not calcined sample was the most active for the abatement of NOx under irradiation. Time course of 4-nitrophenol degradation: (filled circle) as-prepared TiO2; (filled square) calcined at 600°C for 3 h; (filled triangle) Degussa P25; (filled diamond) calcined at 600°C for 10 h.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2013-04-12 |