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Preparation and characterization of anatase N–F-codoped TiO2 sol and its photocatalytic degradation for formaldehyde

Published online by Cambridge University Press:  31 January 2011

Donggen Huang ,
Shijun Liao ,
Shuiqing Quan ,
Lei Liu ,
Zongjian He ,
Jinbao Wan  and
Wenbin Zhou
Donggen Huang*
Affiliation:
College of Environmental Science and Engineering, Nanchang University, Nanchang 330031, China; and College of Chemistry, South China University of Science and Technology, Guangzhou 510640, China
Shijun Liao
Affiliation:
College of Chemistry, South China University of Science and Technology, Guangzhou 510640, China
Shuiqing Quan
Affiliation:
College of Environmental Science and Engineering, Nanchang University, Nanchang 330031, China
Lei Liu
Affiliation:
College of Environmental Science and Engineering, Nanchang University, Nanchang 330031, China
Zongjian He
Affiliation:
College of Environmental Science and Engineering, Nanchang University, Nanchang 330031, China
Jinbao Wan
Affiliation:
College of Environmental Science and Engineering, Nanchang University, Nanchang 330031, China
Wenbin Zhou
Affiliation:
College of Environmental Science and Engineering, Nanchang University, Nanchang 330031, China
*
a)Address all correspondence to this author. e-mail: dghuang1017@163.com
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Abstract

Anatase nitrogen and fluoride codoped TiO2 sol (N–F–TiO2) catalysts were fabricated by a modified sol-gel hydrothermal method, using tetrabutyl titanate as precursor. The microstructure and morphology of sol sample were characterized by x-ray diffraction (XRD), transmission electron microscopy (TEM), ultraviolet-visible dielectric relaxation spectroscopy (UV-VIS-DRS), x-ray photoelectron spectroscopy (XPS), etc. It was shown that N–F–TiO2 particles in sol were partly crystallized to anatase structure and dispersed in the aqueous medium homogeneously. The average particle size was ∼12.0 nm calculated from XRD patterns, and the particle size distribution was narrow. It was noteworthy that the N–F-codoped TiO2 sol particles showed strong visible-light response and high photocatalytic activity for formaldehyde degradation under irradiation by visible light (400–500 nm); we suggested that it may result from the generation of additional band of N 2p in the forbidden band and the synergetic effect of codoping nitrogen and fluorine.

Keywords

DopantPhotochemicalHydrothermal

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Type
Articles
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Journal of Materials Research , Volume 22 , Issue 9 , September 2007 , pp. 2389 - 2397
Copyright
Copyright © Materials Research Society 2007

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References

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