6533b824fe1ef96bd1280afb

RESEARCH PRODUCT

SrTiO 3 -based perovskites: Preparation, characterization and photocatalytic activity in gas–solid regime under simulated solar irradiation

Marta BoaroBartolomeo MegnaLidia ArmelaoElisa I. García-lópezGiuseppe MarcìLeonardo PalmisanoAlessandro TrovarelliFilippo Parisi

subject

Propene partial oxidationInorganic chemistrychemistry.chemical_elementPerovskiteCatalysis2-PropanolPropenechemistry.chemical_compoundsymbols.namesakeX-ray photoelectron spectroscopyPartial oxidationPhotocatalysisPhysical and Theoretical ChemistryPhotodegradationSettore CHIM/02 - Chimica Fisicaintegumentary systemPerovskite Strontium titanate Photocatalysis Propene partial oxidation 2-PropanolSettore ING-IND/22 - Scienza E Tecnologia Dei MaterialichemistryPhotocatalysisStrontium titanatesymbolsStrontium titanateSettore CHIM/07 - Fondamenti Chimici Delle Tecnologie2-Propanol; Perovskite; Photocatalysis; Propene partial oxidation; Strontium titanate; Catalysis; Physical and Theoretical ChemistryRaman spectroscopyCobalt

description

Strontium titanate-based perovskites have been prepared in the presence of Y and Co with the aim to substitute Sr and Ti, respectively, in the ST crystalline structure. The obtained samples have been characterized by XRD, Raman spectroscopy, FE-SEM, XPS and tested as photocatalysts in two gas-solid regime reactions: (i) 2-propanol complete mineralization and (ii) propene partial oxidation, using a system simulating solar irradiation. All the tested samples resulted active as photocatalysts but with significant differences. The lattice substitution of Sr by Y displays a beneficial effect on the 2-propanol photodegradation. Conversely, the partial presence of cobalt on the ST surface, as Co-oxide nanodispersed clusters with a dominant Co(II) phase, plays a substantial detrimental effect on the photo-degradation process of 2-propanol, but favours the photocatalytic partial oxidation of propene to propene oxide. (c) 2014 Elsevier Inc. All rights reserved.

yearjournalcountryeditionlanguage
2015-01-01Journal of Catalysis
https://doi.org/10.1016/j.jcat.2014.10.014