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Nano Research

Article Title

Enhanced photocatalytic activity of TiO2 nanofibers and their flexible composite films: Decomposition of organic dyes and efficient H2 generation from ethanol-water mixtures

Authors

Ming-Chung Wu, Department of Electrical and Information Engineering, University of Oulu, P.O. Box 4500, FI-90014 University of Oulu, Finland Department of Materials Science and Engineering,Taiwan University, Taipei 106-17, Taiwan, China
András Sápi, Department of Applied and Environmental Chemistry, University of Szeged, 6720 Szeged, Rerrich Béla tér 1, Hungary
Anna Avila, Department of Process and Environmental Engineering, P.O. Box 4300, FI-90014 University of Oulu, Finland
Mária Szabó, Department of Applied and Environmental Chemistry, University of Szeged, 6720 Szeged, Rerrich Béla tér 1, Hungary
Jussi Hiltunen, Department of Process and Environmental Engineering, P.O. Box 4300, FI-90014 University of Oulu, Finland
Mika Huuhtanen, Department of Process and Environmental Engineering, P.O. Box 4300, FI-90014 University of Oulu, Finland
Géza Tóth, Department of Electrical and Information Engineering, University of Oulu, P.O. Box 4500, FI-90014 University of Oulu, Finland
kos Kukovecz, Department of Applied and Environmental Chemistry, University of Szeged, 6720 Szeged, Rerrich Béla tér 1, Hungary
Zoltán Kónya, Department of Applied and Environmental Chemistry, University of Szeged, 6720 Szeged, Rerrich Béla tér 1, Hungary
Riitta Keiski, Department of Process and Environmental Engineering, P.O. Box 4300, FI-90014 University of Oulu, Finland
Wei-Fang Su, Department of Materials Science and Engineering,Taiwan University, Taipei 106-17, Taiwan, China
Heli Jantunen, Department of Electrical and Information Engineering, University of Oulu, P.O. Box 4500, FI-90014 University of Oulu, Finland
Krisztián Kordás, Department of Electrical and Information Engineering, University of Oulu, P.O. Box 4500, FI-90014 University of Oulu, Finland

Keywords

TiO2 photocatalyst, metal-decorated TiO2, nanowires, H2 generation, oxidation of organic dyes

Abstract

TiO2 nanofibers decorated with Pt and Pd nanoparticles have been synthesized and studied in various photocatalytic processes. Excellent photocatalytic behavior in the decomposition of organic dyes in water, degradation of organic stains on the surface of flexible freestanding cellulose/catalyst composite films and in generation of hydrogen from ethanol using both suspended and immobilized catalysts are demonstrated. The performance of the nanofiber-based TiO2 materials is competitive with—and in some cases outperforms—their conventional nanoparticle-based counterparts. In all cases, Pd-decorated TiO2 nanoparticles and nanofibers proved to be more efficient than their Pt-based counterparts, which could be explained on the basis of the formation of nano-sized Schottky interfaces at the contacts between TiO2 and metal nanoparticles. The feasibility of forming cellulose/catalyst composites provides a novel way of utilizing photocatalyst materials in large-area coatings and freestanding films.

Graphical Abstract

Publisher

Tsinghua University Press

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