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Rapid Anodic Formation of High Aspect Ratio WO3 Layers with Self-Ordered Nanochannel Geometry and Use in Photocatalysis

Authors

  • Dr. Wei Wei,

    1. Department of Materials Science, WW4-LKO, University of Erlangen–Nuremberg, Martensstrasse 7, 91058 Erlangen (Germany), Fax: (+49) 9131-852-7582
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  • Santosh Shaw,

    1. Department of Materials Science, WW4-LKO, University of Erlangen–Nuremberg, Martensstrasse 7, 91058 Erlangen (Germany), Fax: (+49) 9131-852-7582
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  • Kiyoung Lee,

    1. Department of Materials Science, WW4-LKO, University of Erlangen–Nuremberg, Martensstrasse 7, 91058 Erlangen (Germany), Fax: (+49) 9131-852-7582
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  • Prof. Dr. Patrik Schmuki

    Corresponding author
    1. Department of Materials Science, WW4-LKO, University of Erlangen–Nuremberg, Martensstrasse 7, 91058 Erlangen (Germany), Fax: (+49) 9131-852-7582
    • Department of Materials Science, WW4-LKO, University of Erlangen–Nuremberg, Martensstrasse 7, 91058 Erlangen (Germany), Fax: (+49) 9131-852-7582
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Abstract

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Channel hopping: The formation of WO3 layers with an aligned nanochannel morphology by using self-organizing anodization of a tungsten metal substrate is demonstrated. The nanochannel layers with diameters of approximately 9 nm can be grown to about 10 μm thickness. Layers optimized for length and structure are promising for visible-light photocatalytic applications, such as water-splitting photoanodes (see figure).

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