Controlling the synergistic effect of oxygen vacancies and N dopants to enhance photocatalytic activity of N-doped TiO2 by H2 reduction - Details

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This　paper　focuses　on　improving　photocatalytic　activity　of　N-doped　TiO　2　photocatalyst　for　efficiently　utilizing　solar　energy.　A　simple　H2　reduction　is　found　to　remarkably　enhance　the　photocatalytic　activity　of　N-doped　TiO2　for　ethylene　oxidation　under　visible　light　or　simulated　solar　light　irradiation.　Ultraviolet/visible　diffuse　reflectance　spectra　(UV/vis　DRS),　X-ray　photoelectron　spectra　(XPS)　and　electron　paramagnetic　resonance　(EPR)　spectra　were　employed　to　characterize　the　surface　properties　and　chemical　states　of　nitrogen　dopants　in　H2-reduced　N-doped　TiO2.　The　results　reveal　that　H2　reduction　facilitates　the　creation　of　oxygen　vacancies　and　Ti3+　species　in　N-doped　TiO2　but　without　removal　of　nitrogen　species　from　catalyst　surface.　The　formed　oxygen　vacancies　and　Ti3+　species　seriously　influence　electron　excitation　from　doped　nitrogen　species　and　subsequently　tune　the　generation　of　active　oxygen　species　O2-　radicals　on　N-doped　TiO2.　The　synergistic　effect　of　oxygen　vacancies　and　doped　nitrogen　species　contributes　to　the　enhancement　of　photocatalytic　activity　of　N-doped　TiO2　samples,　but　the　formed　Ti3+　ions　largely　suppress　the　photocatalytic　activity.　©　2012　Elsevier　B.V.

Keyword：

Doping (additives) Electron spin resonance spectroscopy Ethylene Ionization of gases Light Nitrogen Nitrogen removal Oxygen vacancies Paramagnetic resonance Photocatalytic activity Photoelectron spectroscopy Photooxidation Solar energy Titanium dioxide

Community：

[ 1 ] [Zhang, Zizhong]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 2 ] [Long, Jinlin]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 3 ] [Xie, Xiuqiang]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 4 ] [Zhuang, Huaqiang]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 5 ] [Zhou, Yangen]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 6 ] [Lin, Huan]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 7 ] [Yuan, Rusheng]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 8 ] [Dai, Wenxin]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 9 ] [Ding, Zhengxin]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 10 ] [Wang, Xuxu]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 11 ] [Fu, Xianzhi]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China

Reprint 's Address：

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z.zhang@fzu.edu.cn

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Source ：

Applied Catalysis A: General

ISSN： 0926-860X

Year： 2012

Volume： 425-426

Page： 117-124

3 . 4 1

JCR@2012

4 . 7 0 0

JCR@2023

JCR Journal Grade：1

CAS Journal Grade：2

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SCOPUS Cited Count：

ESI Highly Cited Papers on the List： 0 Unfold All

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Chinese Cited Count：

30 Days PV： 2

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