**4. Conclusions**

In this study, a novel approach for the preparation FeOx/ZnS@MIPs has been successfully developed. The fabricated core-shell nanocomposites integrated selective magnetic separation and fluorescence analysis, therefore, they can be used for direct magnetic separation and the selective detection of trace BPA in complex environmental or biological matrices. A series of rebinding experiments showed that the proposed FeOx/ZnS@MIP-based sensor has better selectivity and sensitivity for target BPA than its analogues. The FeOx/ZnS@MIPs also showed good reusability and stability in practical applications. Moreover, by changing the template molecule, this novel approach to multifunctional sensor preparation can be expanded to other organic molecules or protein biomolecules. Such superior optical and physical merits endow the FeOx/ZnS@MIPs with promising potential in food, environmental, clinical diagnostic, and biomedical research.

**Supplementary Materials:** The supplementary materials are available online at http://www.mdpi.com/2073-4360/ 11/7/1210/s1.

**Author Contributions:** X.Z. designed the experiments; data processing, analysis, and interpretation were performed by X.Z., S.Y., W.C., and X.Z., W.C. performed the experiments. Some tests and suggestions were provided by A.L., Y.W. and X.Z., Y.L. wrote the paper. All authors agree on the order of contribution and have given approval to the final version of the manuscript.

**Funding:** We would like to acknowledge the financial support from the scientific research projects of Nanyang Normal University.

**Acknowledgments:** We are very grateful to the research groups of the biological analysis laboratory at the Beijing Institute of Technology. We would also like to show our gratitude to Aiqin Luo.

**Conflicts of Interest:** The authors declare no conflict of interest.
