Inorganic photocatalytic enhancement : Activated RhB Photodegradation by surface modification of SnO2 Nanocrystals with V2 O5-like species
Epifani, Mauro (Istituto per la Microelettronica e i Microsistemi (Lecce, Itàlia))
Kaciulis, Saulius (Istituto per Lo Studio Dei Materiali Nanostrutturati (Roma, Itàlia))
Mezzi, Alessio (Istituto per Lo Studio Dei Materiali Nanostrutturati (Roma, Itàlia))
Altamura, Davide (Istituto di Cristallografia (Bari, Itàlia))
Giannini, Cinzia (Istituto di Cristallografia (Bari, Itàlia))
Díaz, Raül (Instituto IMDEA Energía (Móstoles, Madrid))
Force, Carmen (Universidad Rey Juan Carlos)
Genç, Aziz (Institut Català de Nanociència i Nanotecnologia)
Arbiol i Cobos, Jordi (Institut Català de Nanociència i Nanotecnologia)
Siciliano, Pietro (Istituto per la Microelettronica e i Microsistemi (Lecce, Itàlia))
Comini, Elisabetta (University of Brescia (Itàlia))
Concina, Isabella (Luleå University of Technology (Suècia))

Data:	2017
Resum:	SnO nanocrystals were prepared by precipitation in dodecylamine at 100 °C, then they were reacted with vanadium chloromethoxide in oleic acid at 250 °C. The resulting materials were heat-treated at various temperatures up to 650 °C for thermal stabilization, chemical purification and for studying the overall structural transformations. From the crossed use of various characterization techniques, it emerged that the as-prepared materials were constituted by cassiterite SnO nanocrystals with a surface modified by isolated V(IV) oxide species. After heat-treatment at 400 °C, the SnO nanocrystals were wrapped by layers composed of vanadium oxide (IV-V mixed oxidation state) and carbon residuals. After heating at 500 °C, only SnO cassiterite nanocrystals were obtained, with a mean size of 2. 8 nm and wrapped by only V O-like species. The samples heat-treated at 500 °C were tested as RhB photodegradation catalysts. At 10 M concentration, all RhB was degraded within 1 h of reaction, at a much faster rate than all pure SnO materials reported until now.
Nota:	Ajuts: CSIC/CNR project 2010IT0001 (SYNCAMON), SOLAR project DM19447, VINNOVA Marie Curie Incoming Grant under "Light Energy" project.
Drets:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Publicat a:	Scientific reports, Vol. 7 (2017) , article 44763, ISSN 2045-2322

DOI: 10.1038/srep44763
PMID: 28300185

13 p, 2.0 MB

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