Characterization of perovskite LaFeO3 synthesized by microwave plasma method for photocatalytic applications |
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| Authors: | Orawan Wiranwetchayan Surin Promnopas Surachet Phadungdhitidhada Anukorn Phuruangrat Titipun Thongtem Pisith Singjai Somchai Thongtem |
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| Affiliation: | 1. Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;2. Department of Chemistry, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;3. Research Center in Physics and Astronomy, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;4. Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;5. Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand;6. The Graduate School, Chiang Mai University, Chiang Mai 50200, Thailand |
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| Abstract: | Perovskite LaFeO3 nanoparticles were successfully synthesized by microwave plasma method combined with high temperature calcination at 700–1000?°C. The influences of calcination temperature on morphology, crystalline structure, purity and the atomic compositions of samples were studied. The photocatalytic performance of LaFeO3 was evaluated though the photodegradation of Rhodamine B (RhB) under visible light. In this research, the orthorhombic LaFeO3 nanoparticles showed band gaps in the range of 2.15–2.30?eV. The particle size increased with increasing in the calcination temperature, leading to the decreasing in the surface area. The LaFeO3 sample calcined at 900?°C showed the highest photodegradation of 77.8% and the apparent rate constant of 0.0077?min?1 within 180?min because of the narrower of band gap and the higher crystalline degree and oxygen adsorption. |
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| Keywords: | Microwave plasma Photocatalysis |
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