Preparation and photocatalytic activity of Fe3O4@SiO2@ZnO:La |
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| Affiliation: | 1. Guangxi Key Laboratory of Green Processing of Sugar Resources, College of Biological and Chemical Engineering, Guangxi University of Science and Technology, Liuzhou 545006, China;2. Zhejiang Runtu Co., Ltd., Shangyu 312300, China;1. College of Material Science and Chemical Engineering, Harbin Engineering University, Harbin 150001, China;2. College of Chemistry and Chemical Engineering, Qiqihar University, Qiqihar 161006, China;3. Faculty of Engineering and Applied Science, Memorial University of Newfoundland, St.John''s, A1C 5S7, Canada;1. Pharmaceutical Sciences Research Center, Hemoglobinopathy Institute and Department of Medicinal Chemistry, School of Pharmacy, Mazandaran University of Medical Science, Sari, P.O. Box 48471-93698, Iran;2. Department of Environmental Health Engineering, Health Science Research Center, Faculty of Health, Mazandaran University of Medical Science, Sari, P.O. Box 48471-16548, Iran |
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| Abstract: | In this study, Fe3O4@SiO2@ZnO:La microspheres were successfully prepared. The microspheres have the advantages of both ZnO doped with La and the Fe3O4@SiO2 structure such that the former improves the photocatalytic activity of ZnO and the latter can be reused. The X-ray diffraction (XRD), a field emission scanning electron microscope (SEM), a field emission transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS), and a vibrating sample magnetometer (VSM) were used to characterize Fe3O4@SiO2@ZnO:La microspheres. Methyl orange was used as the model molecule to study the effect of the Zn2+ concentration and the doping amount of La on the photocatalytic activity of Fe3O4@SiO2@ZnO:La microspheres. Results show that in the synthesis of Fe3O4@SiO2@ZnO:La microspheres, photocatalytic activity of the microspheres is enhanced first and weakened later with the increase of Zn2+ concentration. In the La doping process, the photocatalytic activity of Fe3O4@SiO2@ZnO:La microspheres is enhanced with the increase in the La doping amount. The magnetic photocatalysts not only have high photocatalytic activity, but also can be reused. After being reused five times, the photocatalyst's degradation rate of methyl orange is still as high as 81%, which shows that magnetic photocatalysts have prospective wider applications in photocatalytic degradation of dye wastewater. |
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| Keywords: | ZnO:La Photocatalysis Reuse Rare earths |
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