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Enhanced photocatalytic decomposition of methylene blue and toluene gas with hydrothermally coated TiO2-supported on Ag–CaAl2O4:Eu2+, Nd3+ long-lasting phosphor

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Abstract

Titanium dioxide was coated by hydrothermal reaction on the surface of CaAl2O4:Eu2+,Nd3+ long-lasting phosphor beads on which a silver noble metal was impregnated to enhance photocatalytic reactivity. The phosphor composite as a TiO2 supporter was fabricated in the form of beads for convenient applications. Silver was impregnated on the CaAl2O4:Eu2+,Nd3+ long-lasting phosphor using a silver nitrate aqueous solution prior to TiO2 coating process. The morphological and compositional characteristics of the TiO2 coated phosphor composite materials were measured using scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), and X-ray photoelectron spectrometer (XPS). The photocatalytic properties of the TiO2 coated phosphor composite materials were analyzed through decompositions of both methylene blue dye solution and toluene gas under ultraviolet and visible light irradiation. Through measuring the variation of photocatalytic reaction with different Ag concentrations, 0.035 M Ag-impregnated TiO2/CaAl2O4:Eu2+,Nd3+ phosphor composite showed the best photocatalysis efficiency under UV and visible light illumination.

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Acknowledgements

This work was supported by the Basic Study and Interdisciplinary R&D Foundation Fund of the University of Seoul (2023).

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Authors and Affiliations

  1. Department of Materials Science and Engineering, The University of Seoul, Seoul, 02504, Korea

    Da-hyun Lee & Jung-Sik kim

  2. Department of Mining Chemical and Metallurgical Engineering, University of Zimbabwe, Harare, Zimbabwe

    Shielah Mavengere

  3. Department of Materials Engineering, Keimyung University, Daegu, 42403, Korea

    Bumrae Cho

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  1. Da-hyun Lee
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Lee, Dh., Mavengere, S., Cho, B. et al. Enhanced photocatalytic decomposition of methylene blue and toluene gas with hydrothermally coated TiO2-supported on Ag–CaAl2O4:Eu2+, Nd3+ long-lasting phosphor. Reac Kinet Mech Cat 137, 571–585 (2024). https://doi.org/10.1007/s11144-023-02550-5

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