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  • Visible light activated photocatalytic behaviour of rare earth modified commercial TiO2
    Tobaldi, David Maria ...
    The photocatalytic activity (PCA) of the samples was assessed in gas-solid phase-monitoring the degradation of isopropanol (IPA)-under visible-light irradiation. Results showed that the addition of ... the REs lanthanum, europium and yttrium to TiO2 greatly improved its photocatalytic activity, despite the thermal treatment, because of the presence of more surface hydroxyl groups attached to the photocatalyst's surface, together with a higher specific surface area (SSA) of the modified and thermally treated samples, with regard to the unmodified and thermally treated Degussa P25. The samples doped with La, Eu and Y all had excellent PCA under visible-light irradiation, even higher than the untreated Degussa P25 reference sample, despite their thermal treatment at 900 °C, with lanthanum producing the best results (i.e. the La-, Eu- and Y-TiO2 samples, thermally treated at 900 °C, had, respectively, a PCA equal to 26, 27 and 18 ppm h-1-in terms of acetone formation-versus 15 ppm hŽ1for the 900 °C thermally treated Degussa P25). On the other hand, Ce-TiO2s had no significant photocatalytic activity.
    Vir: Materials research bulletin. - ISSN 0025-5408 (Vol. 50, 2014, str. 183-190)
    Vrsta gradiva - članek, sestavni del ; neleposlovje za odrasle
    Leto - 2014
    Jezik - angleški
    COBISS.SI-ID - 1979495

    Povezava(-e):

    http://dx.doi.org/10.1016/j.materresbull.2013.10.033
    DOI

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