A novel molecularly imprinted polymer (MIP) photoelectrochemical sensor was fabricated for the highly sensitive and selective detection of triclosan. The MIP photoelectrochemical sensor was fabricated using graphite‐like carbon nitride (g‐C₃N₄) and gold nanoparticles (AuNPs) as photoelectric materials. The MIP/g‐C₃N₄‐AuNPs sensor used photocurrent as the detection signal and was triggered by ultraviolet light (UV‐Light 365 nm). g‐C₃N₄‐AuNPs was immobilized on indium tin oxide electrodes to produce the photoelectrochemically responsive electrode of the MIP/g‐C₃N₄‐AuNPs sensor. A MIP layer of poly‐o‐phenylenediamine was electropolymerized on the g‐C₃N₄‐AuNPs‐modified electrode to act as the recognition element of the MIP/g‐C₃N₄‐AuNPs sensor and to enable the selective adsorption of triclosan to the sensor through specific binding. Under optimal experimental conditions, the designed MIP/g‐C₃N₄‐AuNPs sensor presented high sensitivity for triclosan with a linear range of 2×10⁻¹² to 8×10⁻¹⁰ M and a limit of detection of 6.01×10⁻¹³ M. Moreover, the MIP/g‐C₃N₄‐AuNPs sensor showed excellent selectivity. The sensor had been successfully applied in the analysis of toothpaste samples.

中文翻译：

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基于g-C3N4-AuNPs的新型分子印迹光电化学传感器用于三氯生的高灵敏度和选择性检测

新型分子印迹聚合物（MIP）光电传感器是为三氯生的高灵敏度和选择性检测制作的。MIP光电化学传感器是使用类石墨氮化碳（g-C ₃ N ₄）和金纳米颗粒（AuNPs）作为光电材料制造的。MIP / g-C ₃ N ₄ -AuNPs传感器使用光电流作为检测信号，并被紫外线（365 nm紫外线）触发。将g‐C ₃ N ₄ ‐ AuNPs固定在氧化铟锡电极上以产生MIP / g‐C ₃ N ₄ ‐ AuNPs传感器的光电化学响应电极。聚的MIP层ö苯二胺在g-C ₃ N ₄ -AuNPs修饰电极上电聚合，充当MIP / g-C ₃ N ₄ -AuNPs传感器的识别元件，并通过特异性结合使三氯生选择性吸附到传感器上。在最佳实验条件下，所设计的MIP / G-C ₃ Ñ _4个-AuNPs传感器呈现高灵敏度对三氯生与2×10的线性范围^-12〜8×10 ^-10 M和检测的6.01×10的极限^{- 13M}  。此外，MIP / g-C ₃ N ₄‐AuNPs传感器显示出极好的选择性。该传感器已成功应用于牙膏样品的分析中。