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Photo-fenton refreshable Fe3O4@HCS adsorbent for the elimination of tetracycline hydrochloride

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Abstract

A yolk–shell-structured sphere composed of a superparamagnetic Fe3O4 core and a carbon shell (Fe3O4@HCS) was etched from Fe3O4@SiO2@carbon by NaOH, which was synthesized through the layer-by-layer coating of Fe3O4. This yolk–shell composite has a shell thickness of ca. 27 nm and a high specific surface area of 213.2 m2 g−1. Its performance for the magnetic removal of tetracycline hydrochloride from water was systematically examined. A high equilibrium adsorption capacity of ca. 49.0 mg g−1 was determined. Moreover, the adsorbent can be regenerated within 10 min through a photo-Fenton reaction. A stable adsorption capacity of 44.3 mg g−1 with a fluctuation <10% is preserved after 5 consecutive adsorption–degradation cycles, demonstrating its promising application potential in the decontamination of sewage water polluted by antibiotics.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (21673073, 21677048, U1407102 and 21377038), the National Basic Research Program of China (973 Program, 2013CB632403), the Science and Technology Commission of Shanghai Municipality (14230710500, 14ZR1440500 and 16JC1401400), PetroChina Innovation Foundation (2015D-5006-0402) and the Fundamental Research Funds for the Central Universities (222201717003).

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Yan, X., Gan, K., Tian, B. et al. Photo-fenton refreshable Fe3O4@HCS adsorbent for the elimination of tetracycline hydrochloride. Res Chem Intermed 44, 1–11 (2018). https://doi.org/10.1007/s11164-017-3028-y

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