Sonocatalytic degradation of a textile dye over Gd-doped ZnO nanoparticles synthesized through sonochemical process |
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| Institution: | 1. Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran;2. Department of Environmental Health Engineering, School of Health, Arak University of Medical Sciences, Arak, Iran;3. School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, South Korea;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. Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand;4. Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Hat Yai, Songkhla 90112, Thailand;1. Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran;2. Department of Chemical Engineering, Tabriz Branch, Islamic Azad University, 51579-44533 Tabriz, Iran;3. School of Mechanical Engineering, Yeungnam University, 712-749 Gyeongsan, South Korea;1. Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran;2. Department of Environmental Health Engineering, School of Health, Arak University of Medical Sciences, Arak, Iran;3. School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, South Korea |
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| Abstract: | The present study was performed to sonochemically synthesize GdxZn1 ? xO (x = 0–0.1) nanoparticles for sonocatalysis of Acid Orange 7 (AO7) in an aqueous medium. The results of X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) analysis confirmed proper synthesis of Gd-doped sonocatalyst. 5% Gd-doped ZnO nanoparticles with band gap of 2.8 eV exhibited the highest sonocatalytic decolorization efficiency of 90% at reaction time of 90 min. The effects of initial dye concentration and sonocatalyst dosage on decolorization efficiency were evaluated. In the presence of sodium sulfate, sodium carbonate and sodium chloride the decolorization efficiency decreased from 90 to 78, 65 and 56%, respectively. Among various enhancers, the addition of potassium periodate improved the decolorization efficiency from 90 to 100%. The highest decolorization efficiency was obtained at pH value of 6.34 (90%). The decolorization efficiency decreased only 6% after 4 repeated runs. Therefore, Gd-doped ZnO nanoparticles can be used as a promising catalyst for degradation of organic pollutants with great reusability potential. |
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| Keywords: | Sonocatalysis Nanocatalyst Acid Orange 7 Nano-sonocatalyst Doped ZnO |
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