A new strategy for enhancing the photoelectric activity of poly(5-formylindole) (P5FIn) was developed by introducing the inorganic semiconductor material (NiO) to form organic-inorganic heterojunctions. P5FIn/NiO heterojunctions were firstly prepared by combining hydrothermal synthesis and electrochemical polymerization. Due to the synergistic effect between P5FIn and NiO, the photoelectrochemical (PEC) performance of this heterojunction was significantly enhanced compared to pure P5FIn and NiO. The reason for the enhanced PEC performance is mainly attributed to the increased visible light utilization and the bandgap matching effect of the P5FIn/NiO heterojunctions. Based on the prepared P5FIn/NiO heterojunctions, a novel PEC sensor for aflatoxin B1 (AFB1) detection was also constructed with a wide linear range of 0.005–50 ng mL−1 and a limit of detection (LOD) of 0.0015 ng mL−1. Moreover, this constructed PEC sensor also had good stability, reproducibility, selectivity, and satisfactory actual sample detection ability. This strategy may inspire more design and application of high-performance photoelectric active material based on inorganic semiconductor and organic conducting polymer heterojunctions. Graphical abstract Graphical abstract

中文翻译：

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基于有机-无机异质结纳米材料的增强型黄曲霉毒素B1检测光电化学传感器：聚（5-甲酰基吲哚）/NiO

通过引入无机半导体材料（NiO）形成有机-无机异质结，开发了一种增强聚（5-甲酰基吲哚）（P5FIn）光电活性的新策略。P5FIn/NiO异质结首次采用水热合成和电化学聚合相结合的方法制备。由于 P5FIn 和 NiO 之间的协同作用，与纯 P5FIn 和 NiO 相比，该异质结的光电化学 (PEC) 性能显着增强。PEC 性能增强的原因主要归因于可见光利用率的增加和 P5FIn/NiO 异质结的带隙匹配效应。基于制备的 P5FIn/NiO 异质结，还构建了一种用于黄曲霉毒素 B1 (AFB1) 检测的新型 PEC 传感器，其线性范围为 0。005–50 ng mL-1，检测限 (LOD) 为 0.0015 ng mL-1。此外，这种构建的PEC传感器还具有良好的稳定性、重现性、选择性和令人满意的实际样品检测能力。这一策略可能会激发更多基于无机半导体和有机导电聚合物异质结的高性能光电活性材料的设计和应用。图形摘要图形摘要