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

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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.

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Acknowledgment

We gratefully acknowledge the financial support of Guangdong Natural Science Foundation (020863 and 036555).

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Authors and Affiliations

  1. College of Environmental Science and Engineering, Nanchang University, Nanchang, 330031, China

    Donggen Huang, Shuiqing Quan, Lei Liu, Zongjian He, Jinbao Wan & Wenbin Zhou

  2. College of Chemistry, South China University of Science and Technology, Guangzhou, 510640, China

    Donggen Huang & Shijun Liao

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  1. Donggen Huang
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  2. Shijun Liao
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  3. Shuiqing Quan
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  4. Lei Liu
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  7. Wenbin Zhou
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Correspondence to Donggen Huang.

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Huang, D., Liao, S., Quan, S. et al. Preparation and characterization of anatase N–F-codoped TiO2 sol and its photocatalytic degradation for formaldehyde. Journal of Materials Research 22, 2389–2397 (2007). https://doi.org/10.1557/jmr.2007.0319

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  • DOI: https://doi.org/10.1557/jmr.2007.0319

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