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6. Microwave-assisted synthesis of heterostructure Pd/ZnO flowers used for photocatalytic reaction of dyes illuminated by UV radiation

Author

Areerat Nunpradit, Titipun Thongtem, Nuengruethai Ekthammathat, Somchai Thongtem, Phattranit Dumrongrojthanath, Thawatchai Sakhon, and Anukorn Phuruangrat

Subjects
chemistry.chemical_compound, Materials science, X-ray photoelectron spectroscopy, chemistry, Specific surface area, Photocatalysis, Methyl orange, Heterojunction, Fourier transform infrared spectroscopy, Photodegradation, Spectroscopy, Nuclear chemistry
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.

Published
2021
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