Liu Jiawei, Zou Jin, Deng Linbo, Peng Guanwei, Liu Shuwu, Rui Peixin, Wang Xiaoqiang, Wang Linyu, Gao Yansha, Lu Limin
Key Laboratory of Chemical Utilization of Plant Resources of Nanchang, College of Chemistry and Materials, Jiangxi Agricultural University, Nanchang 330045, People's Republic of China.
College National Engineering Research Center for Carbohydrate Synthesis, Jiangxi Normal University, Nanchang 330022, People's Republic of China.
Nanotechnology. 2023 Oct 6;34(50). doi: 10.1088/1361-6528/acfb0d.
In this work, an electrochemical sensor based on ion-imprinted polymer/Au nanoparticles/porous biochar (IIP/AuNPs/PBC) composite was proposed for the highly selective and sensitive detection of Pb. In this work, poly (thionine) (pTHI) served simultaneously as imprinted polymer and reference probe. It could not only realize the specific detection of Pb, but also provide an internal reference signal to eliminate the influence of human and environmental factors on the detection signal and further improve the stability of the sensor. In addition, the AuNPs/PBC composite with large specific surface area, excellent electron transport and electrocatalytic performance could effectively enhance the detection signal as a carrier material. At the same time, the AuNPs on the PBC surface would promote the formation of uniform and stable IIP through Au-S bonds. The synergistic effect between IIP, AuNPs/PBC and ratiometric signal mode gave the Pbsensor excellent performance, including a wide linear range (0.1-1000g l), low detection limit (0.03g l, S/N = 3), excellent selectivity and stability. All these results indicate that the proposed sensor could provide a meaningful reference for highly selective detection of heavy metal ions (HMIs).
在本工作中，提出了一种基于离子印迹聚合物/金纳米粒子/多孔生物炭（IIP/AuNPs/PBC）复合材料的电化学传感器，用于高选择性和灵敏地检测铅。在本工作中，聚硫堇（pTHI）同时作为印迹聚合物和参比探针。它不仅能实现对铅的特异性检测，还能提供一个内部参比信号，以消除人为和环境因素对检测信号的影响，并进一步提高传感器的稳定性。此外，具有大比表面积、优异电子传输和电催化性能的AuNPs/PBC复合材料作为载体材料能有效增强检测信号。同时，PBC表面的AuNPs会通过Au-S键促进均匀且稳定的IIP的形成。IIP与AuNPs/PBC以及比率信号模式之间的协同效应赋予了铅传感器优异的性能，包括宽线性范围（0.1 - 1000 μg L⁻¹）、低检测限（0.03 μg L⁻¹，S/N = 3）、优异的选择性和稳定性。所有这些结果表明，所提出的传感器可为重金属离子（HMIs）的高选择性检测提供有意义的参考。
