Preparation and visible-light photocatalysis of hollow rock-salt TiO 1-xNx nanoparticles

Seul Gi Seo; Cheol Hee Park; Ha Yeong Kim; Woo Hyun Nam; Mahn Jeong; Yong Nam Choi; Young Soo Lim; Won Seon Seo; Sung Jin Kim; Jeong Yong Lee; Yong Soo Cho

doi:10.1039/c3ta00936j

Preparation and visible-light photocatalysis of hollow rock-salt TiO _1-xN_x nanoparticles

Seul Gi Seo, Cheol Hee Park, Ha Yeong Kim, Woo Hyun Nam, Mahn Jeong, Yong Nam Choi, Young Soo Lim, Won Seon Seo, Sung Jin Kim, Jeong Yong Lee, Yong Soo Cho

Department of Chemistry & Nanoscience

Research output: Contribution to journal › Article › peer-review

19 Scopus citations

Abstract

A simple method for the preparation of hollow rock-salt TiO _1-xN_x 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 Ti_0.7(O_0.67N_0.33)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 TiO_1-xN_x nanoparticles presented efficient visible-light photocatalytic activity, and their origins were discussed.

Original language	English
Pages (from-to)	3639-3644
Number of pages	6
Journal	Journal of Materials Chemistry A
Volume	1
Issue number	11
DOIs	https://doi.org/10.1039/c3ta00936j
State	Published - 21 Mar 2013

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10.1039/c3ta00936j

Cite this

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title = "Preparation and visible-light photocatalysis of hollow rock-salt TiO 1-xNx nanoparticles",

abstract = "A simple method for the preparation of hollow rock-salt TiO 1-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.",

author = "Seo, {Seul Gi} and Park, {Cheol Hee} and Kim, {Ha Yeong} and Nam, {Woo Hyun} and Mahn Jeong and Choi, {Yong Nam} and Lim, {Young Soo} and Seo, {Won Seon} and Kim, {Sung Jin} and Lee, {Jeong Yong} and Cho, {Yong Soo}",

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TY - JOUR

T1 - Preparation and visible-light photocatalysis of hollow rock-salt TiO 1-xNx nanoparticles

AU - Seo, Seul Gi

AU - Park, Cheol Hee

AU - Kim, Ha Yeong

AU - Nam, Woo Hyun

AU - Jeong, Mahn

AU - Choi, Yong Nam

AU - Lim, Young Soo

AU - Seo, Won Seon

AU - Kim, Sung Jin

AU - Lee, Jeong Yong

AU - Cho, Yong Soo

PY - 2013/3/21

Y1 - 2013/3/21

N2 - A simple method for the preparation of hollow rock-salt TiO 1-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.

AB - A simple method for the preparation of hollow rock-salt TiO 1-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.

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