Abstract
This study focuses on the synthesis and characterization of recyclable nano-adsorbents of magnetic nanocomposites (Fe3O4@ZnO-RGO). The Fe3O4 nanoparticles were used as magnetic responders, ZnO coated on the surface of Fe3O4 not only captured Cu2+ but also prevented the oxidation of Fe3O4, and reduced graphene oxide (RGO) acted as Fe3O4@ZnO carrying platform could effectively adsorb Cu2+. The physical and chemical performance characterization suggested that the nano-adsorbents had stable structure, good hydrophilicity, and magnetic properties. Furthermore, the research results on adsorption performance indicated that the Fe3O4@ZnO-RGO had high adsorption properties for Cu2+, and the adsorption rate could reach more than 98%. The adsorption process conformed to the Langmuir model and second-order adsorption kinetics, and the adsorption of Cu2+ was mainly chemisorption, accompanied by physical adsorption. In addition, because of the special magnetic response performance, Fe3O4@ZnO-RGO could be quickly separated from the solutions for cyclic adsorption so as to avoid secondary pollution. This provided a valuable idea for the effective development of clean and efficient Cu2+ adsorbents, and the Fe3O4@ZnO-RGO had great application potential in the field of Cu2+ wastewater treatment.
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Acknowledgements
The authors are grateful to the National Nature Science Foundation of China (No. 51902141), the Natural Science Foundation of Jiangsu Province (No. BK20191038), and the “Qinglan Project of Jiangsu Universities” of Jiangsu Province.
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Guohao Sun and Juan Wu wrote the main manuscript text. Peixin Hu, Hechao Lu, Qinting He, and Fang Ren participated in the experiments and organized data to draw figures and tables. Wei Jiang provided guidance for the experiment and revised and polished the manuscript. All authors reviewed the manuscript.
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Sun, G., Hu, P., Lu, H. et al. Facile synthesis of magnetic high-efficiency renewable nanosorbent for recyclable adsorption of Cu2+. J Nanopart Res 26, 102 (2024). https://doi.org/10.1007/s11051-024-06017-z
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DOI: https://doi.org/10.1007/s11051-024-06017-z