Abstract：
The incidence of esophageal cancer is positively associated with fumonisin contamination. It is necessary to develop methods for the rapid detection of fumonisins. In this work, a self-powered photoelectrochemical aptamer sensor based on ZnIn2S4/WO3 photoanode and Au@W-Co3O4 photocathode is proposed for the sensitive detection of fumonisin B1 (FB1). Among them, under visible light irradiation, the Z-type heterostructure of ZnIn2S4/WO3 acts as a photoanode to improve the electron transfer rate, which contributes to the enhancement of the photocathode signal and lays the foundation for a wider detection range. The Au@W-Co3O4 photocathode as a sensing interface reduces the probability of false positives (comparison of anode sensing platforms). The PEC sensor has a good working performance in the detection range (10 pg/mL-1000 ng/mL) with a detection limit of 2.7 pg/mL (S/N = 3). In addition, the sensor offers good selectivity, stability and excellent recoveries in real sample analysis. This work is expected to play a role in the field of analyzing environmental toxins.
摘要：
食管癌的病发率与伏马菌素沾染呈正相干。有必要开发快速检测伏马菌素的方法。在这项工作中,提出了一种基于ZnIn2S4/WO3光电阳极和Au@W-Co3O4光电阴极的自供电光电化学适配体传感器，用于灵敏检测伏马菌素B1（FB1）。其中,在可见光照射下，ZnIn2S4/WO3的Z型异质结构充当光电阳极，以提高电子转移速率，这有助于光电阴极信号的增强,为更宽的检测范围奠定了基础。Au@W-Co3O4光电阴极作为传感界面降低了假阳性的可能性(阳极传感平台的比较)。PEC传感器在检测范围（10pg/mL-1000ng/mL）内具有良好的工作性能，检测限为2.7pg/mL（S/N=3）。此外,传感器提供了良好的选择性，在实际样品分析中的稳定性和优异的回收率。这项工作有望在分析环境毒素领域发挥作用。
