Fe2O3/ZnO/ZnFe2O4 composites for the efficient photocatalytic degradation of organic dyes under visible light |
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| Affiliation: | 1. School of Chemistry and Chemical Engineering, Jiangsu University, Zhenjiang 212013, PR China;2. Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China;1. Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Viet Nam;2. Faculty of Electrical & Electronics Engineering, Ton Duc Thang University, Ho Chi Minh City, Viet Nam;3. Physics Department (I3N), University of Aveiro, Campus Universitario de Santiago, Aveiro, Portugal;4. Department of Chemistry, Faculty of Sciences, Najafabad Branch, Islamic Azad University, Najafabad, Iran;5. Department of Materials and Ceramic Engineering (DEMaC), University of Aveiro, Campus Santiago, Aveiro, 3810-193, Portugal;1. Department of Chemistry, Science and Research Branch, Islamic Azad University, Tehran, Iran;2. Faculty of Chemistry, Islamic Azad University Tehran North Branch, Hakimieh, Tehran, Iran;3. Department of Chemistry, Iran University of Science and Technology, Narmak, Tehran, 16846-13114, Iran;1. College of Materials Science and Engineering, Nanjing Tech University, NO.5 Xinmofan Road, Nanjing 210009, PR China;2. Bengbu Design & Research Institute for Glass Industry, Bengbu 233000, Anhui, PR China |
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| Abstract: | In this study, novel ternary Fe2O3/ZnO/ZnFe2O4 (ZFO) composites were successfully prepared through a simple hydrothermal reaction with subsequent thermal treatment. The as-prepared products were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Brunauer-Emmett-Teller (BET) analysis, Barrett-Joyner-Halenda (BJH) measurement, and UV–vis diffuse reflectance spectroscopy (UV–vis DRS). The photocatalytic degradation of rhodamine B (Rh B) under visible light irradiation indicated that the ZFO composites calcined at 500 °C has the best photocatalytic activity (the photocatalytic degradation efficiency can reach up to 95.7% within 60 min) and can maintain a stable photocatalytic degradation efficiency for at least three cycles. In addition, the photocatalytic activity of ZFO composites toward dye decomposition follows the order cationic Rh B > anionic methyl orange. Finally, using different scavengers, superoxide and hydroxyl radicals were identified as the primary active species during the degradation reaction of Rh B. |
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| Keywords: | Calcination Visible light photocatalytic Organic dyes removal |
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