Efficient visible-light-induced photocatalytic reduction of 4-nitroaniline to p-phenylenediamine over nanocrystalline PbBi2Nb2O 9 - Details

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Abstract：

Nanocrystalline　PbBi2Nb2O9　was　successfully　prepared　by　a　modified　sol-gel　method.　The　as-prepared　nanocrystalline　PbBi2Nb2O9　was　an　active　visible-light-driven　photocatalyst　for　the　photoreduction　of　4-nitroaniline　to　p-phenylenediamine　in　aqueous　solution　upon　purging　with　N2.　Its　photocatalytic　activity　was　determined　by　the　balance　between　the　surface　area　and　crystallinity.　The　best　sample　was　obtained　after　calcination　at　650　°C,　giving　4-nitroaniline　conversion　of　∼100%　and　p-phenylenediamine　selectivity　of　∼99%　after　irradiation　for　150　min,　which　was　much　higher　than　those　of　bulk　PbBi2Nb2O9　and　TiO　2-xNx　photocatalysts.　Further　experiments　revealed　that　oxalate　anion　(as　a　hole　scavenger)　was　indispensable　for　the　photocatalytic　reduction　of　4-nitroaniline.　Moreover,　on　the　basis　of　the　electron　spin　resonance　analysis　result,　a　mechanism　was　proposed　to　explain　the　photoreduction　of　4-nitroaniline　over　nanocrystalline　PbBi2Nb　2O9.　©　2012　Elsevier　Inc.　All　rights　reserved.

Keyword：

Aromatic compounds Bismuth compounds Crystallinity Lead compounds Light Magnetic moments Nanocrystals Niobium compounds Photocatalysis Photocatalytic activity Sol-gel process Sol-gels Titanium dioxide

Community：

[ 1 ] [Wu, Weiming]State Key Laboratory Breeding Base of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 2 ] [Liu, Guodong]State Key Laboratory Breeding Base of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 3 ] [Liang, Shijing]State Key Laboratory Breeding Base of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 4 ] [Chen, Yan]State Key Laboratory Breeding Base of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 5 ] [Shen, Lijuan]State Key Laboratory Breeding Base of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 6 ] [Zheng, Huarong]State Key Laboratory Breeding Base of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 7 ] [Yuan, Rusheng]State Key Laboratory Breeding Base of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 8 ] [Hou, Yidong]State Key Laboratory Breeding Base of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China
[ 9 ] [Wu, Ling]State Key Laboratory Breeding Base of Photocatalysis, Research Institute of Photocatalysis, Fuzhou University, Fuzhou 350002, China

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wuling@fzu.edu.cn

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Source ：

Journal of Catalysis

ISSN： 0021-9517

Year： 2012

Volume： 290

Page： 13-17

5 . 7 8 7

JCR@2012

6 . 5 0 0

JCR@2023

JCR Journal Grade：1

CAS Journal Grade：1

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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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