N-TiO2/Cu-TiO2 double-layer films: Impact of stacking order on photocatalytic properties

[Display omitted] •N-TiO2/Cu-TiO2 and Cu-TiO2/N-TiO2 layers were stacked in a thin film configuration.•Visible and simulated solar radiation were applied in the oxidation of 2-propanol.•Cu-TiO2 on the outer layer resulted in strong oxidation rate and moderate PL.•Cu-driven electrons are responsible...

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Bibliographic Details
Published in:Journal of catalysis 2017-09, Vol.353, p.116-122
Main Authors: Garlisi, Corrado, Szlachetko, Jakub, Aubry, Cyril, Fernandes, Daniel L.A., Hattori, Yocefu, Paun, Cristina, Pavliuk, Mariia V., Rajput, Nitul S., Lewin, Erik, Sá, Jacinto, Palmisano, Giovanni
Format: Article
Language:English
Subjects:
N-TiO2/Cu-TiO2 films
Photocatalytic oxidation
Stacking order
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Summary:[Display omitted] •N-TiO2/Cu-TiO2 and Cu-TiO2/N-TiO2 layers were stacked in a thin film configuration.•Visible and simulated solar radiation were applied in the oxidation of 2-propanol.•Cu-TiO2 on the outer layer resulted in strong oxidation rate and moderate PL.•Cu-driven electrons are responsible for generation of reactive radicals on the surface. In this work, we report for the first time a unique configuration of N-doped and Cu-doped TiO2 bilayer. The activity of TiO2 was improved by combining Cu- and N-doping in a layered thin-film structure. The impact of the stacking order was studied, pointing out how the best arrangement is by far the one with Cu-TiO2 as the top layer. The results reveal a unique and simple way to enhance the photocatalytic response of TiO2 in the visible domain.
ISSN:0021-9517
1090-2694
1090-2694
DOI:10.1016/j.jcat.2017.06.028