N-doped TiO2 powders were prepared by two different sol–gel methods. Samples were characterised by X-ray diffraction (XRD), BET specific surface area measurements (SSA), scanning electron microscopy (SEM), diffuse reflectance spectroscopy (DRS), X-ray photoelectron spectroscopy (XPS) and Electron Paramagnetic Resonance (EPR). XPS measurements revealed a signal at 400 eV assignable to nitrogen in the form of Ti N O. EPR signals are attributed to molecular NO trapped with cavities/defects possibly interacting with oxygen vacancies. The photocatalytic activity under UV and visible light was determined following the abatement of NOx and the photodegradation of 2-propanol in gas–solid systems. N-doped TiO2 showed a higher activity compared with the pristine commercial and home prepared samples under visible light irradiation. A good photoactivity in the abatement of both NOx and 2-propanol is also observed for mechanical dispersions of N-TiO2 in CaCO3 serving as a model in view of perspective application in photocatalytically active construction and architectural materials.
|Data di pubblicazione:||2013|
|Titolo:||N-TiO2 Photocatalysts highly active under visible irradiation for NOX abatement and 2-propanol oxidation|
|Citazione:||Amadelli, R., Samiolo, L., Borsa, M., Bellardita, M., & Palmisano, L. (2013). N-TiO2 Photocatalysts highly active under visible irradiation for NOX abatement and 2-propanol oxidation. CATALYSIS TODAY, 20(206), 19-25.|
|Digital Object Identifier (DOI):||http://dx.doi.org/10.1016/j.cattod.2011.11.031|
|Settore Scientifico Disciplinare:||Settore CHIM/07 - Fondamenti Chimici Delle Tecnologie|
|Appare nelle tipologie:||1.01 Articolo in rivista|