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WO3 Coupled P-TiO2 Photocatalysts with Mesoporous Structure

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Abstract

A series of WO3 coupled P-doped TiO2 photocatalysts with mesoporous structure were synthesized by the decomposition of the doped H3PW12O40 precursor in the framework of TiO2. The effects of P doping and WO3 coupling on the structures, surface acidity, and optical properties of TiO2 were investigated by TGA, DSC, FT-IR, XRD, NH3-TPD, SEM, TEM, XPS, UV–Vis DRS, PL, and BET surface areas. Results show that the presence of phosphorus adds thermal stability to the mesoporous TiO2 framework and addition of WO3 greatly increases the Lewis acidity of the catalyst, which leads to a higher affinity for the reaction molecules. Moreover, WO3 coupling and P doping extent light response to the visible region due the formation of extra energy levels within the band gap. The samples show high visible light photocatalytic efficiency for the degradation of methylene blue. This is mainly attributed to good visible light absorption, high adsorption affinity toward organic molecules and the low recombination rate of photogenerated electron/hole pairs.

Graphical abstract

A new visible light active mesoporous photocatalyst was designed by coupling WO3 to P-doped TiO2. The doping extents the wavelength response ranges to the visible region. Moreover, the presence of phosphorus adds stability to the mesoporous TiO2 framework and WO3 increases the Lewis acidity of the catalyst, which leads to a higher affinity for the reaction molecules.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (No.21067004), the Young Science Foundation of Jiangxi Province Education Office (No.GJJ10150), and the Open Foundation of State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University (No.200906).

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Authors and Affiliations

  1. School of Materials and Chemical Engineering, Jiangxi University of Science and Technology, 86 Hongqi Road, Ganzhou, 341000, Jiangxi, China

    Changlin Yu & Kai Yang

  2. Department of Chemistry, The Center of Novel Functional Molecules and Environmental Science Programme, The Chinese University of Hong Kong, Shatin, New Territories, Hong Kong, China

    Jimmy C. Yu

  3. School of Information Engineering, Jiangxi University of Science and Technology, 86 Hongqi Road, Ganzhou, 341000, Jiangxi, China

    Wanqin Zhou

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  1. Changlin Yu
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  2. Jimmy C. Yu
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  3. Wanqin Zhou
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  4. Kai Yang
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Correspondence to Changlin Yu.

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Yu, C., Yu, J.C., Zhou, W. et al. WO3 Coupled P-TiO2 Photocatalysts with Mesoporous Structure. Catal Lett 140, 172–183 (2010). https://doi.org/10.1007/s10562-010-0434-9

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  • DOI: https://doi.org/10.1007/s10562-010-0434-9

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