Issue 11, 2013
From the journal:

Journal of Materials Chemistry A

Preparation and visible-light photocatalysis of hollow rock-salt TiO1−xNx nanoparticles†

Seul Gi Seo,‡af   Cheol-Hee Park,‡b   Ha-Yeong Kim,c   Woo Hyun Nam,d   Mahn Jeong,a   Yong-Nam Choi,e   Young Soo Lim,*a   Won-Seon Seo,a   Sung-Jin Kim,c   Jeong Yong Leed  and  Yong Soo Chof  

* Corresponding authors

a Energy and Environmental Division, Korea Institute of Ceramic Engineering and Technology, Seoul 153-801, Republic of Korea
E-mail: yslim@kicet.re.kr

b Corporate R&D, LG Chem/Research Park, Daejeon 305-380, Republic of Korea

c Department of Chemistry and Nano Science, Ewha Womans University, Seoul 120-750, Republic of Korea

d Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology and Center for Nanomaterials and Chemical Reactions, IBS, Daejeon 305-701, Republic of Korea

e Neutron Science Division, Korea Atomic Energy Research Institute, Daejeon 305-353, Republic of Korea

f Department of Materials Science and Engineering, Yonsei University, Seoul 120-749, Republic of Korea

Abstract

A simple method for the preparation of hollow rock-salt TiO1−xNx nanoparticles and their visible-light photocatalytic activities are presented. By thermal annealing of TiO2 nanoparticles under NH3/N2 gas flow at 800 °C, a rock-salt TiO phase was achieved far below its transition temperature to a monoclinic TiO phase (1250 °C). The composition of the nanoparticles was revealed to be Ti0.7(O0.67N0.33)1 by detailed structural and compositional characterizations, and their structural stability was critically determined by the formation of vacancies and the incorporation of N. The hollow rock-salt TiO1−xNx nanoparticles presented efficient visible-light photocatalytic activity, and their origins were discussed.

Graphical abstract: Preparation and visible-light photocatalysis of hollow rock-salt TiO1−xNx nanoparticles

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Article information

DOI
https://doi.org/10.1039/C3TA00936J
Article type
Paper
Submitted
01 Nov 2012
Accepted
14 Jan 2013
First published
17 Jan 2013

J. Mater. Chem. A, 2013,1, 3639-3644

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Preparation and visible-light photocatalysis of hollow rock-salt TiO1−xNx nanoparticles

S. G. Seo, C. Park, H. Kim, W. H. Nam, M. Jeong, Y. Choi, Y. S. Lim, W. Seo, S. Kim, J. Y. Lee and Y. S. Cho, J. Mater. Chem. A, 2013, 1, 3639 DOI: 10.1039/C3TA00936J

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