TiOxNy/TiO2 Photocatalyst for Hydrogen Evolution under Visible-Light Irradiation. I: Characterization of N in TiOxNy/TiO2 Photocatalyst | Zendy

Akiyo Ozawa | Zendy; Muneaki Yamamoto | Zendy; T. Tanabe | Zendy; Tomoko Yoshida | Zendy

Open Access

TiO_xN_y/TiO₂ Photocatalyst for Hydrogen Evolution under Visible-Light Irradiation. I: Characterization of N in TiO_xN_y/TiO₂ Photocatalyst

Author(s) -

Akiyo Ozawa,

Muneaki Yamamoto,

T. Tanabe,

Tomoko Yoshida

Publication year - 2019

Publication title -

acs omega

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.779

H-Index - 40

ISSN - 2470-1343

DOI - 10.1021/acsomega.9b02977

Subject(s) - photocatalysis , x ray photoelectron spectroscopy , visible spectrum , materials science , irradiation , hydrogen production , xanes , water splitting , aqueous solution , hydrogen , nuclear chemistry , analytical chemistry (journal) , catalysis , chemistry , chemical engineering , spectroscopy , physics , quantum mechanics , engineering , biochemistry , optoelectronics , organic chemistry , chromatography , nuclear physics

TiO x N y /TiO 2 was synthesized by nitriding of TiO 2 in NH 3 gas. TiO x N y /TiO 2 generated hydrogen from methanol aqueous solution under visible-light irradiation. It was revealed by N K-edge XANES and N 1s XPS measurements that the N species contributing to visible-light responsiveness was the O-Ti-N species. The structure of TiO x N y /TiO 2 showing the photocatalytic activity was a double shell type with thin layers of TiO x N y that covers the TiO 2 core. Although N content on the surface decreased during the photocatalytic reaction, N was supplied from the deeper side to keep the TiO x N y phase at the surface and the activity as well.

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