Analysis of the formation process and performance of magnetic Fe₃O₄@Poly（4-vinylpyridine） absorbent prepared by in-situ synthesis

Birong Zeng，Li Yang，Wei Zheng，Jihong Zhu，Xiaojun Ma，Xinyu Liu，Conghui Yuan，Yiting Xu，Lizong Dai

College of Materials, Fujian Provincial Key Laboratory of Fire Retardant Materials, Xiamen University

摘 要：The morphology evolution of the mesoporous magnetic composite nanospheres Fe₃O₄@Poly（4-vinylpyridine） during the formation process and its absorption property of Congo red were studied in this study. A simple solvothermal method was applied for the fabrication of Fe₃O₄@Poly（4-vinylpyridine）composites with regular structure and uniform size distribution in the presence of 4-vinylpyridine as the structure inducer. The morphology, structure and magnetism performance were characterized and the adsorption model and mechanism were discussed. The results showed that the Fe₃O₄@Poly（4-vinylpyridine） composites were efficient adsorbent for the removal of Congo red from water and it could be reused by a magnetic separation. The adsorption isotherm of Congo red on Fe₃O₄@Poly（4-vinylpyridine） composites was fitted well with the Langmuir adsorption model.

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