Efficient visible-light-induced photocatalytic reduction of 4-nitroaniline to p-phenylenediamine over nanocrystalline PbBi2Nb2O9

被引：66

作者：

Wu, Weiming ^{[1
]}

Liu, Guodong ^{[1
]}

Liang, Shijing ^{[1
]}

Chen, Yan ^{[1
]}

Shen, Lijuan ^{[1
]}

Zheng, Huarong ^{[1
]}

Yuan, Rusheng ^{[1
]}

Hou, Yidong ^{[1
]}

Wu, Ling ^{[1
]}

机构：

[1] Fuzhou Univ, State Key Lab Breeding Base Photocatalysis, Res Inst Photocatalysis, Fuzhou 350002, Peoples R China

来源：

JOURNAL OF CATALYSIS | 2012年 / 290卷

基金：

中国国家自然科学基金;

关键词：

PbBi2Nb2O9; Nanocrystalline; Nitro reduction; Photocatalysis; Visible light;

D O I：

10.1016/j.jcat.2012.02.005

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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 N-2. Its photocatalytic activity was determined by the balance between the surface area and crystallinity. The best sample was obtained after calcination at 650 degrees C, giving 4-nitroaniline conversion of similar to 100% and p-phenylenediamine selectivity of similar to 99% after irradiation for 150 min, which was much higher than those of bulk PbBi2Nb2O9 and TiO2-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 PbBi2Nb2O9. (c) 2012 Elsevier Inc. All rights reserved.

引用

页码：13 / 17

页数：5

共 25 条

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