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Inorganic Photocatalytic Enhancement: Activated RhB Photodegradation by Surface Modification of SnO2 Nanocrystals with V2O5-like species
Istituto per la Microelettronica e i Microsistemi, IMM-CNR.
Istituto per lo Studio dei Materiali Nanostrutturati, ISMN-CNR.
Istituto per lo Studio dei Materiali Nanostrutturati, ISMN-CNR.
Istituto di Cristallografia, IC-CNR.
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Number of Authors: 12
2017 (English)In: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 7, 44763Article in journal (Refereed) Published
Abstract [en]

SnO2 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 SnO2 nanocrystals with a surface modified by isolated V(IV) oxide species. After heat-treatment at 400 °C, the SnO2 nanocrystals were wrapped by layers composed of vanadium oxide (IV-V mixed oxidation state) and carbon residuals. After heating at 500 °C, only SnO2 cassiterite nanocrystals were obtained, with a mean size of 2.8 nm and wrapped by only V2O5-like species. The samples heat-treated at 500 °C were tested as RhB photodegradation catalysts. At 10-7 M concentration, all RhB was degraded within 1 h of reaction, at a much faster rate than all pure SnO2 materials reported until now.

Place, publisher, year, edition, pages
2017. Vol. 7, 44763
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Experimental physics
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URN: urn:nbn:se:ltu:diva-62573DOI: 10.1038/srep44763ISI: 000396534800001PubMedID: 28300185Scopus ID: 2-s2.0-85015710811OAI: oai:DiVA.org:ltu-62573DiVA: diva2:1083130
Note

Validerad; 2017; Nivå 2; 2017-03-20 (andbra)

Available from: 2017-03-20 Created: 2017-03-20 Last updated: 2017-04-18Bibliographically approved

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