Abstract
Pd nanoparticles loaded on ZnO flowers were successfully synthesized by microwave-assisted deposition method. Phase, morphology, vibrational mode, composition, oxidation state, and specific surface area of heterostructure Pd/ZnO composites were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), Brunauer–Emmett–Teller (BET) surface area analysis, field emission scanning electron microscopy (FE-SEM), and energy-dispersive X-ray spectroscopy (EDS). Effect of weight content of the loaded Pd on photodegradation of methylene blue (MB) and methyl orange (MO) illuminated by UV radiation was evaluated. Heterostructure Pd/ZnO composites have photocatalytic efficiency higher than hexagonal ZnO flowers. Schottky Pd/ZnO interface played the role in the charge separation process. In this research, heterostructure 5% Pd/ZnO composites have the highest photodegradation of MB and MO under UV radiation. Main active species of the degradation process and stability of the photocatalyst were investigated. A proposed mechanism for photodegradation of MB and MO was also explained.
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Funding
The research was supported by the Prince of Songkla University, and the Program Management Unit for Human Resources & Institutional Development, Research and Innovation, Office of National Higher Education Science Research, and Innovation Policy Council (NXPO) [Grant Number B16F640001].
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Phuruangrat, A., Nunpradit, A., Sakhon, T. et al. Microwave-assisted synthesis of heterostructure Pd/ZnO flowers used for photocatalytic reaction of dyes illuminated by UV radiation. J Aust Ceram Soc 57, 1521–1530 (2021). https://doi.org/10.1007/s41779-021-00642-w
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DOI: https://doi.org/10.1007/s41779-021-00642-w