College of Health Science and Engineering, Hubei University, Wuhan, Hubei, 430062, China; Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, Hubei, 430062, China.
Ministry of Education Key Laboratory for the Green Preparation and Application of Functional Materials, School of Materials Science and Engineering, Hubei University, Wuhan, Hubei, 430062, China.
Anal Chim Acta. 2023 Aug 15;1269:341341. doi: 10.1016/j.aca.2023.341341. Epub 2023 May 9.
It is a great challenge to develop an effective super-sensitive capture method for multiplex heavy metal ions (HMIs), because HMIs is extremely toxic to public health and the environment, what's more their contamination is usually multiplex ions pollution. In this work, a 3D high-porous conductive polymer hydrogel was designed and prepared with high-stable and easy mass production, which is very favorable for the industrialization. The polymer hydrogel (g-CN-P(Ani-Py)-PAAM) was formed from the mixture of aniline pyrrole copolymer and acrylamide cross-linked with phytic acid as dopant and cross-linker and integrated with g-CN. The 3D networked high-porous hydrogel not only exhibits excellent electrical conductivity, but also provides a large surface area for increasing the number of immobilized ions. Importantly, the 3D high-porous conductive polymer hydrogel was applied successfully in electrochemical multiplex sensing of HIMs. The prepared sensor used differential pulse anodic stripping voltammetry exhibited high sensitivities, low detection limit and wide detection ranges for Cd, Pb, Hg and Cu, respectively. Moreover, the sensor showed a high accuracy in lake water test. The preparation and application of the hydrogel in electrochemical sensor provided an availability strategy to capture and detect the various HMIs by electrochemistry in solution and has great commercial application prospect.
开发一种有效的多重重金属离子（HMIs）超灵敏捕获方法是一项巨大的挑战，因为 HMIs 对公众健康和环境具有极强的毒性，而且它们的污染通常是多重离子污染。在这项工作中，设计并制备了一种具有高稳定性和易于大规模生产的 3D 高多孔导电聚合物水凝胶，这非常有利于工业化。聚合物水凝胶（g-CN-P（Ani-Py）-PAAM）由苯胺吡咯共聚物和丙烯酰胺混合而成，以植酸作为掺杂剂和交联剂，并与 g-CN 结合。3D 网络状高多孔水凝胶不仅具有优异的导电性，而且为增加固定化离子数量提供了更大的表面积。重要的是，3D 高多孔导电聚合物水凝胶成功应用于电化学多重 HMIs 传感。所制备的传感器使用差分脉冲阳极溶出伏安法分别对 Cd、Pb、Hg 和 Cu 表现出高灵敏度、低检测限和宽检测范围。此外，该传感器在湖水测试中表现出很高的准确性。该水凝胶在电化学传感器中的制备和应用为通过电化学在溶液中捕获和检测各种 HMIs 提供了一种可行的策略，具有巨大的商业应用前景。
