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Highly efficient removal of malachite green from water by ZnO/NiO/CeO2 nanocomposite

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Abstract

In this study, a kind of ZnO/NiO/CeO2 nanocomposite constructed by solution method was adopted to remove malachite green (MG) dye from water. The nanocomposite was characterized by Zeta potential, SEM, TEM, FTIR, XRD, XPS and BET analysis. The results indicate that ZnO/NiO/CeO2 has hierarchical porous structure containing micropores, mesopores and macropores. Through the study of the adsorption process, the adsorption performance of ZnO/NiO/CeO2 was evaluated systematically. The adsorption conditions such as initial concentration of dye, pH value and adsorption time were considered, and the equilibrium adsorption and kinetic were described by different isotherm and kinetics models. We demonstrate that ZnO/NiO/CeO2 composite displays preferential adsorption performance to cationic dye MG with great adsorption capacity of 7600 mg g−1. The ZnO/NiO/CeO2 nanocomposite displays highest removal rate when pH is 7, with adsorption time of 60 min at room temperature. The pseudo-second-order kinetic and Langmuir isothermal models are well applied to the adsorption process of MG on ZnO/NiO/CeO2. The adsorbent can be recycled for four times and maintain good adsorption performance all the time.

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Acknowledgements

This work was financially supported the National Natural Science Foundation of China (Grant 21201160) and Jilin Province Science and Technology Development Program (Grants 20170101180JC).

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Correspondence to Yuqin Ma or Lang Zhao.

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Lu, S., Xiang, D., Fan, Y. et al. Highly efficient removal of malachite green from water by ZnO/NiO/CeO2 nanocomposite. Appl Nanosci 12, 2241–2254 (2022). https://doi.org/10.1007/s13204-022-02491-w

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  • DOI: https://doi.org/10.1007/s13204-022-02491-w

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