Black and white anatase, rutile and mixed forms: Band-edges and photocatalytic activity

Zhou X, Wierzbicka E, Liu N, Schmuki P (2019)

Publication Type: Journal article

Publication year: 2019

Journal

Chemical Communications Royal Society of Chemistry

Book Volume: 55

Pages Range: 533-536

Journal Issue: 4

DOI: 10.1039/c8cc07665k

Abstract

Here we investigate the band-level energetics of "black" hydrogenated titania in different polymorphs using in situ photoelectrochemical measurements and XPS valence band measurements. We find that the conduction band of black rutile is higher in energy than in black anatase by 0.4 eV. For photocatalytic hydrogen generation, in a polymorph hetero-junction such as in black Degussa P25, thus black rutile can act as a photosensitizer while black anatase provides charge-mediation catalysis onto H 2 O to generate H 2 . By optimizing the thermal reduction conditions of black anatase/rutile junctions the H 2 production can be significantly increased.

Authors with CRIS profile

Xuemei Zhou Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Ewa Wierzbicka Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Ning Liu Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik) Patrik Schmuki Lehrstuhl für Werkstoffwissenschaften (Korrosion und Oberflächentechnik)

How to cite

APA:

Zhou, X., Wierzbicka, E., Liu, N., & Schmuki, P. (2019). Black and white anatase, rutile and mixed forms: Band-edges and photocatalytic activity. Chemical Communications, 55(4), 533-536. https://dx.doi.org/10.1039/c8cc07665k

MLA:

Zhou, Xuemei, et al. "Black and white anatase, rutile and mixed forms: Band-edges and photocatalytic activity." Chemical Communications 55.4 (2019): 533-536.

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