Photoreduction deposition and characterization of heterostructure Pt/ZnO nanocomposites used for UV-light-driven photocatalysis
- Division of Physical Science, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand
- Department of Industrial Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
- Faculty of Science, Energy and Environment, King Mongkut’s University of Technology North Bangkok, Rayong Campus, Rayong 21120, Thailand
- Advanced Scientific Instruments Unit, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
- Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
- Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
- Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
Received: 2025-01-27
Revised: 2025-04-21
Accepted: 2025-05-05
Published in Issue 2025-09-30
Published Online: 2025-05-13
Copyright (c) -1 Anukorn Phuruangrat, Yothin Chimupala, Asanee Somdee, Budsabong Kuntalue, Titipun Thongtem, Somchai Thongtem (Author)

This work is licensed under a Creative Commons Attribution 4.0 International License.
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Abstract
0.5%, 1.0%, and 3.0% Pt/ZnO nanocomposites synthesized by the photoreduction deposition method were used for studying UV-light-driven photodegradation of methylene blue (MB). Phase and composition of heterostructure 3.0% Pt/ZnO nanocomposites were indexed to a hexagonal ZnO phase doped with face-centered cubic (FCC) Pt structure characterized by XRD. According to FTIR and Raman analyses of Pt/ZnO nanocomposites, the vibration of ZnO was influenced by the strong interaction of metallic Pt nanoparticles. SEM images of heterostructure Pt/ZnO nanocomposites show that they were composed of flower-like ZnO structures with spherical Pt nanoparticles decorated on the surface of nanoplate petals. The photocatalytic performance of the as-prepared samples was evaluated by deleting methylene blue (MB) as a toxic dye model under UV light irradiation. The loaded Pt nanoparticles played the role in preventing the recombination of photo-excited electrons and photo-induced holes and enhancing the photocatalytic reaction of ZnO. In this research, 0.5% Pt/ZnO nanocomposites were the best UV-light-driven photocatalyst with % degradation efficiency of 97.37% within 180 min and with ●O2− and h+ as main active species.
Research Highlights
- Pt/ZnO nanocomposites are UV-light-driven photocatalyst.
- They were successfully prepared by photoreduction deposition method.
- The promising material used for wastewater treatment.
Keywords
- Main active radicals,
- Pt/ZnO nanocomposites,
- Scavenger agents,
- UV-light-driven photocatalyst
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