Self-powered sensing platforms have received widespread attention in areas such as portable, wearable and point-of-care devices. Here we reported visible light mediated self-powered electrochemical sensing based on target induced recombination of photogenerated carriers, which has highly sensitive to detect copper ions concentration. We utilized the recombination of photogenerated carriers mechanism to design visible light-responsive Fe₂O₃-CdS n-n heterojunction as photoanode material, which greatly improved the problem of output energy in photocatalytic self-powered sensors. Expectedly, our proposed visible light mediated self-powered electrochemical system has high separation efficiency of photogenerated carriers, which is 8.4 times that in presence of Cu²⁺. Furthermore, this self-powered electrochemical sensing platform used Cu²⁺ induced recombination of photogenerated carriers, showed a clear linear relationship from 1 nM to 5000 nM with an acceptable detection limit of 0.4 nM. This self-powered electrochemical sensing platform with excellent selectivity, accredited reproducibility and believable stability exhibited promising prospects in developing portable sensing devices and detection chip for real-time and rapid monitoring of Cu²⁺.

自供电的感应平台在便携式，可穿戴和即时医疗设备等领域受到广泛关注。在这里，我们报告了基于光诱导的载流子的目标诱导复合的可见光介导的自供电电化学传感，该传感对检测铜离子浓度高度敏感。我们利用光生载流子的复合机理，设计了可见光响应的Fe ₂ O ₃ -CdS nn异质结作为光阳极材料，大大改善了光催化自供电传感器的输出能量问题。可以预期，我们提出的可见光介导的自供电电化学系统具有高的光生载流子分离效率，是存在Cu ^2+时的8.4倍。此外，该自供电的电化学传感平台使用Cu ²⁺诱导的光生载流子重组，显示出从1 nM到5000 nM的清晰线性关系，可接受的检测限为0.4 nM。这种具有出色的选择性，经认可的重现性和令人信服的稳定性的自供电式电化学传感平台，在开发便携式传感设备和用于实时，快速监测Cu ^2+的检测芯片方面，具有广阔的前景。