Inorganic photocatalytic enhancement: Activated RhB Photodegradation by surface modification of SnO<inf>2</inf> Nanocrystals with V<inf>2</inf> O<inf>5</inf>-like species

Mauro Epifani, Saulius Kaciulis, Alessio Mezzi, Davide Altamura, Cinzia Giannini, Raül Díaz, Carmen Force, Aziz Genç, Jordi Arbiol, Pietro Siciliano, Elisabetta Comini, Isabella Concina

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    11 Citations (Scopus)

    Abstract

    © The Author(s) 2017. 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 V2 O5-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.
    Original languageEnglish
    Article number44763
    JournalScientific Reports
    Volume7
    DOIs
    Publication statusPublished - 16 Mar 2017

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