Controlling the synergistic effect of oxygen vacancies and N dopants to enhance photocatalytic activity of N-doped TiO 2 by H 2 reduction - Details

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Abstract：

This　paper　focuses　on　improving　photocatalytic　activity　of　N-doped　TiO　2　photocatalyst　for　efficiently　utilizing　solar　energy.　A　simple　H　2　reduction　is　found　to　remarkably　enhance　the　photocatalytic　activity　of　N-doped　TiO　2　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　H　2-reduced　N-doped　TiO　2.　The　results　reveal　that　H　2　reduction　facilitates　the　creation　of　oxygen　vacancies　and　Ti　3+　species　in　N-doped　TiO　2　but　without　removal　of　nitrogen　species　from　catalyst　surface.　The　formed　oxygen　vacancies　and　Ti　3+　species　seriously　influence　electron　excitation　from　doped　nitrogen　species　and　subsequently　tune　the　generation　of　active　oxygen　species　O　2　-　radicals　on　N-doped　TiO　2.　The　synergistic　effect　of　oxygen　vacancies　and　doped　nitrogen　species　contributes　to　the　enhancement　of　photocatalytic　activity　of　N-doped　TiO　2　samples,　but　the　formed　Ti　3+　ions　largely　suppress　the　photocatalytic　activity.　©　2012　Elsevier　B.V.

Keyword：

Ethylene photooxidation; H 2 reduction; N-doped TiO 2; Oxygen vacancies; Synergistic effect

Community：

[ 1 ] [Zhang, Z.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 2 ] [Long, J.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 3 ] [Xie, X.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 4 ] [Zhuang, H.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 5 ] [Zhou, Y.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 6 ] [Lin, H.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 7 ] [Yuan, R.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 8 ] [Dai, W.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 9 ] [Ding, Z.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 10 ] [Wang, X.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 11 ] [Fu, X.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China

Reprint 's Address：

[Zhang, Z.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China

Email：

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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ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 0

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