Improving visible-light photocatalytic activity of N-doped TiO2 nanoparticles via sensitization by Zn porphyrin

被引：87

作者：

Chen, Daimei ^{[1
]}

Yang, Dong ^{[1
]}

Geng, Jiaqing ^{[1
]}

Zhu, Juhong ^{[1
]}

Jiang, Zhongyi ^{[1
]}

机构：

[1] Tianjin Univ, Key Lab Green Chem Technol, Sch Chem Engn & Technol, Tianjin 300072, Peoples R China

来源：

APPLIED SURFACE SCIENCE | 2008年 / 255卷 / 05期

关键词：

TiO2; Nanoparticles; Nitrogen doping; Zn porphyrin; Visible-light photocatalysis;

D O I：

10.1016/j.apsusc.2008.08.032

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：

In order to utilize visible light more efficiently in the photocatalytic reaction, N-doped TiO2 (N-TiO2) nanoparticles sensitized by Zn porphyrin including [tetrakis(4-carboxyphenyl) porphyrinato]zinc(II) (ZnTCPP) and [tetraphenyl-porphyrinato] zinc(II) (ZnTPP) were prepared, and characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), atomic absorption spectrometry (AAS), Fourier transform infrared spectroscopy (FT-IR) and UV-vis spectroscopy, etc. The characterization results show that the ZnTCPP is chemisorbed on the surface of TiO2 through an O=C-O-Ti bond; while the ZnTPP is physically adsorbed. N-TiO2 sensitized by Zn porphyrin exhibits higher absorption in the visible-light region and photocatalytic degradation efficiency of methylene blue under visible-light irradiation than N-TiO2 and TiO2 sensitized by ZnTCPP. Moreover, their visible-light photocatalytic mechanism was discussed. (C) 2008 Elsevier B.V. All rights reserved.

引用

页码：2879 / 2884

页数：6

共 29 条

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