Abstract
Heterostructure Pd/Bi2WO6 nanocomposites as visible-light-driven photocatalyst used for degradation of rhodamine B (RhB) were prepared by a sonochemical-assisted deposition method. Phase, morphology, atomic vibration mode, oxidation state of element and optical properties of pure Bi2WO6 and heterostructure Pd/Bi2WO6 nanocomposites were characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, transmission electron microscopy, Fast-Fourier-Transform electron diffraction and X-ray photoelectron spectroscopy. The analyses showed a mixed phase of face-centered cubic Pd structure as a minor phase and orthorhombic Bi2WO6 structure as a major phase with Pd nanoparticles supported on top of Bi2WO6 nanoplates. The photocatalytic performance of Bi2WO6 and Pd/Bi2WO6 was tested through photodegradation of rhodamine B (RhB) under visible light irradiation. In this research, the loaded Pd nanoparticles greatly increased the photodegradation of RhB under visible light irradiation. Heterostructure 10% Pd/Bi2WO6 nanocomposites showed the highest photocatalytic activity for RhB degradation under visible light irradiation because of the formation of Schottky barriers and promotion of interfacial charge-transfer kinetics between metallic nanoparticles and semiconducting nanoplates.
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Acknowledgements
We are extremely grateful to the Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand, Contact No. SCI6202009S and Faculty of Science Research Fund, Faulty of Science, Prince of Songkla University, Thailand, Contract No. 1-2563-02-002 and Center of Excellence in Materials Science and Technology, Chiang Mai University, Thailand for providing financial research.
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Bunluesak, T., Phuruangrat, A., Teppetcharat, J. et al. Enhanced visible-light-driven Pd/Bi2WO6 heterojunctions used for photodegradation of rhodamine B. J IRAN CHEM SOC 18, 1103–1111 (2021). https://doi.org/10.1007/s13738-020-02095-7
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DOI: https://doi.org/10.1007/s13738-020-02095-7