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<p>As a typical endocrine disrupter, bisphenol A (BPA) could damage the reproductive and endocrine systems of humans and mammals. Therefore, the precise removal of BPA from the environment becomes increasing urgent. In this work, we employ Pickering emulsion polymerization to prepare the molecularly imprinted polymers (MIPs) microspheres through the non-covalent molecular imprinting strategy, which contain specific binding sites for the precise recognition of BPA. Graphite-carbon nitride (g-C<sub>3</sub>N<sub>4</sub>) possesses a unique interfacial characteristic and is expected to develop potential application in the field of Pickering emulsion polymerization. In the process of polymerization, g-C<sub>3</sub>N<sub>4</sub> nanosheets are used as the sole emulsifier to build the Pickering oil/water emulsion system followed by the thermal-induced radical polymerization. The template molecules of BPA could be eluted from the polymer microspheres by continuous soxhlet extraction. The obtained MIPs microspheres were characterized with the help of optical microscope and field emission scanning electron microscope, respectively. The MIPs microspheres present regularly spherical structure with a relative broad size distribution. The formation of imprinted sites on the MIPs was validated through a batch of rebinding experiments, including the binding kinetics, binding isotherm, selective experiment and competitive experiment. The MIPs microspheres would have broad application prospect in environmental and analytical fields.</p> Graphical abstract <p></p>

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Fabrication of bisphenol a imprinted polymers microspheres as an adsorbent via pickering emulsion polymerization stabilized with g-C3N4 nanosheets

  • 期刊论文

  • 发表日期：

    2026年6月26日

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  • Zehu Wang,
  • Xiaoliang Zhang,
  • Yanming Wang,
  • Xuan Yue

摘要

As a typical endocrine disrupter, bisphenol A (BPA) could damage the reproductive and endocrine systems of humans and mammals. Therefore, the precise removal of BPA from the environment becomes increasing urgent. In this work, we employ Pickering emulsion polymerization to prepare the molecularly imprinted polymers (MIPs) microspheres through the non-covalent molecular imprinting strategy, which contain specific binding sites for the precise recognition of BPA. Graphite-carbon nitride (g-C3N4) possesses a unique interfacial characteristic and is expected to develop potential application in the field of Pickering emulsion polymerization. In the process of polymerization, g-C3N4 nanosheets are used as the sole emulsifier to build the Pickering oil/water emulsion system followed by the thermal-induced radical polymerization. The template molecules of BPA could be eluted from the polymer microspheres by continuous soxhlet extraction. The obtained MIPs microspheres were characterized with the help of optical microscope and field emission scanning electron microscope, respectively. The MIPs microspheres present regularly spherical structure with a relative broad size distribution. The formation of imprinted sites on the MIPs was validated through a batch of rebinding experiments, including the binding kinetics, binding isotherm, selective experiment and competitive experiment. The MIPs microspheres would have broad application prospect in environmental and analytical fields.

Graphical abstract