Experimental visualization of covalent bonds and structural disorder in a gallium zinc oxynitride photocatalyst (Ga1−xZnx)(N1−xOx): origin of visible light absorption

Masatomo Yashima; Hiroki Yamada; Kazuhiko Maeda; Kazunari Domen

doi:10.1039/B922008A

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Experimental visualization of covalent bonds and structural disorder in a gallium zinc oxynitride photocatalyst (Ga_1−xZn_x)(N_1−xO_x): origin of visible light absorption†

Masatomo Yashima,*^a Hiroki Yamada,^a Kazuhiko Maeda^b and Kazunari Domen^b

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* Corresponding authors

^a Department of Materials Science and Engineering, Interdisciplinary Graduate School of Science and Engineering, Tokyo Institute of Technology, Nagatsuta-cho 4259-J2-61, Midori-ku, Yokohama-shi, Japan
E-mail: yashima@materia.titech.ac.jp

^b Department of Chemical System Engineering, School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo, Japan

Abstract

We present the experimental visualization of covalent bonding, positional disorders and split anion sites in visible-light responsive photocatalyst (Ga_0.885Zn_0.115)(N_0.885O_0.115). ZnO alloying into GaN reduces the band gap, leading to the visible-light response. DFT calculations indicated no significant difference in band gap between structural models with and without split sites.

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Article information

DOI: https://doi.org/10.1039/B922008A
Article type: Communication
Submitted: 21 Oct 2009
Accepted: 16 Feb 2010
First published: 05 Mar 2010

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Chem. Commun., 2010,46, 2379-2381

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Experimental visualization of covalent bonds and structural disorder in a gallium zinc oxynitride photocatalyst (Ga_1−xZn_x)(N_1−xO_x): origin of visible light absorption

M. Yashima, H. Yamada, K. Maeda and K. Domen, Chem. Commun., 2010, 46, 2379 DOI: 10.1039/B922008A

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