N-Doped SiO2/TiO2 mesoporous nanoparticles with enhanced photocatalytic activity under visible-light irradiation - Details

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Abstract：

Mesoporous　nanocrystalline　N-doped　SiO2/TiO2　visible-light　photocatalysts　were　prepared　by　treating　SiO2/TiO2　xerogels　in　a　flow　of　nitrogen　gas　bubbled　through　concentrated　ammonia　solution.　Structural　characterization　and　performance　analysis　results　revealed　that　the　addition　of　SiO2　remarkably　altered　the　phase　composition,　specific　surface　area,　microstructure,　as　well　as　the　photocatalytic　activity　of　N-doped　TiO2.　The　presence　of　SiO2　in　N-doped　TiO2　particles　suppressed　the　formation　of　rutile　phase　and　the　crystal　growth　of　N-doped　TiO2　particles　during　thermal　calcinations.　When　weight　ratio　of　SiO2/TiO2　was　in　0.05-0.20,　the　N-doped　SiO2/TiO2　exhibited　higher　photocatalytic　activity　than　the　N-doped　TiO2,　and　optimum　ratio　was　found　to　be　0.05.　The　enhanced　photocatalytic　activity　could　be　attributed　to　the　higher　specific　area,　larger　pore　volume,　and　more　surface　hydroxyl　groups　in　the　catalyst.　©　2008　Elsevier　Ltd.　All　rights　reserved.

Keyword：

N-Doping; Photocatalysis; Silica; Titania; Visible light

Community：

[ 1 ] [Hou, Y.D.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou, 350002, China
[ 2 ] [Wang, X.C.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou, 350002, China
[ 3 ] [Wu, L.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou, 350002, China
[ 4 ] [Chen, X.F.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou, 350002, China
[ 5 ] [Ding, Z.X.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou, 350002, China
[ 6 ] [Wang, X.X.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou, 350002, China
[ 7 ] [Fu, X.Z.]Research Institute of Photocatalysis, State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou, 350002, China

Reprint 's Address：

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

Email：

xzfu@fzu.edu.cn

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Source ：

Chemosphere

ISSN： 0045-6535

Year： 2008

Issue： 3

Volume： 72

Page： 414-421

3 . 0 5 4

JCR@2008

8 . 1 0 0

JCR@2023

JCR Journal Grade：1

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ESI Highly Cited Papers on the List： 0 Unfold All

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30 Days PV： 1

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