A self-powered cathodic molecular imprinting ultrasensitive photoelectrochemical tetracycline sensor via ZnO/C photoanode signal amplification

IF 9.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Chinese Chemical Letters Pub Date : 2024-06-22 DOI:10.1016/j.cclet.2024.110169

Qinghong Pan , Huafang Zhang , Qiaoling Liu , Donghong Huang , Da-Peng Yang , Tianjia Jiang , Shuyang Sun , Xiangrong Chen

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Abstract

Quantitative determination of tetracycline (TC) in environment and foods is of great importance, as excessive residues might have negative effects on human health and environmental risks. Herein, a self-powered molecularly imprinted photoelectrochemical (PEC) sensor based on the ZnO/C photoanode and the Fe-doped CuBi₂O₄ (CBFO) photocathode is developed for the sensitive detection of TC. The photocathodic current can be amplified by the efficient electron transfer caused by the Fermi energy level gap between the photoanode and photocathode. Furthermore, molecularly imprinted polymers (MIPs) at photocathode can selectivity identify the TC templates and thus improve the specificity. Under the optimal conditions, the sensor has a linear range of 10^‒2–1.0 × 10⁵ nmol/L, and a limit of detection (LOD) of 0.007 nmol/L (S/N = 3). More crucially, the milk sample detection is carried out using the as-prepared sensor, and the outcome is satisfactory. The research gives us a novel sensing platform for quick and accurate antibiotic (like TC) in environment and food monitoring.

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通过 ZnO/C 光阳极信号放大实现自供电阴极分子印迹超灵敏光电化学四环素传感器

定量检测环境和食品中的四环素（TC）具有重要意义，因为过量的残留可能会对人类健康产生负面影响，并带来环境风险。本文开发了一种基于 ZnO/C 光阳极和铁掺杂 CuBi2O4（CBFO）光阴极的自供电分子印迹光电化学（PEC）传感器，用于灵敏检测四环素。光阳极和光阴极之间的费米能级间隙所产生的高效电子转移可以放大光阴极电流。此外，光阴极上的分子印迹聚合物（MIPs）可以选择性地识别 TC 模板，从而提高特异性。在最佳条件下，传感器的线性范围为 10-2-1.0 × 105 nmol/L，检测限（LOD）为 0.007 nmol/L（信噪比为 3）。更重要的是，我们使用制备的传感器对牛奶样品进行了检测，结果令人满意。这项研究为我们提供了一个新颖的传感平台，用于快速准确地监测环境和食品中的抗生素（如 TC）。

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来源期刊

Chinese Chemical Letters 化学-化学综合

CiteScore

14.10

自引率

15.40%

发文量

8969

审稿时长

1.6 months

期刊介绍： Chinese Chemical Letters (CCL) (ISSN 1001-8417) was founded in July 1990. The journal publishes preliminary accounts in the whole field of chemistry, including inorganic chemistry, organic chemistry, analytical chemistry, physical chemistry, polymer chemistry, applied chemistry, etc.Chinese Chemical Letters does not accept articles previously published or scheduled to be published. To verify originality, your article may be checked by the originality detection service CrossCheck.