Chinese Journal of Applied Chemistry ›› 2020, Vol. 37 ›› Issue (11): 1316-1323.DOI: 10.11944/j.issn.1000-0518.2020.11.200119

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Synthesis of Magnetic CuS Composite Nanomaterial and Its Specific Adsorption of Hg(II) in Water

WANG Qiushia,b, HE Junhuia*   

  1. aFunctional Nanomaterials Laboratory, Center for Micro/Nanomaterials and Technology, Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;
    bUniversity of Chinese Academy of Sciences,Beijing 100049,China
  • Received:2020-04-24 Revised:2020-05-19 Accepted:2020-06-12 Online:2020-11-01 Published:2020-11-04
  • Contact: HE Junhui, professor; Tel/Fax:010-82543535;; Research interests:functional nanomaterials and devices
  • Supported by:
    Supported by the National Key Research and Development Program of China(No.2017YFA0207102), and the National Natural Science Foundation of China(No.91963104)

Abstract: Design and synthesis of adsorption/enrichment materials with rapid adsorption rate and good adsorption selectivity are significant for high-efficiency uptake and precise detection of Hg2+ ions. In this work, a magnetic CuS composite nanomaterial (Fe3O4@SiO2@CuS) was successfully synthesized by a facile and economic strategy, and a series of adsorption experiments was carried out to investigate the adsorption performance of core-shell structured Fe3O4@SiO2@CuS towards Hg2+ ions in aqueous solution. The results show that Fe3O4@SiO2@CuS exhibits fast adsorption kinetics and excellent adsorption capacity. It also displays a superior selective capture of Hg2+ in the presence of other co-existing metal ions, and the removal efficiency of Hg2+ is as high as 99.9%. In addition, Fe3O4@SiO2@CuS can be separated easily and fastly from samples under an external magnetic field, which is attributed to its magnetic property. These results demonstrate that magnetic metal sulfide composite nanomaterials have great application prospects in the areas of adsorption, enrichment and detection.

Key words: magnetic composite nanomaterials, CuS, mercury ion, adsorption, enrichment

CLC Number: