协同信号放大启动的创新自供电光电化学自适应传感：一种由高光捕获光电阳极激活的巧妙光电阴极,Analytical Chemistry

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协同信号放大启动的创新自供电光电化学自适应传感：一种由高光捕获光电阳极激活的巧妙光电阴极
Analytical Chemistry ( IF 6.7 ) Pub Date : 2023-04-25 , DOI: 10.1021/acs.analchem.3c00337
Peilin Yang ₁ , Huihui Jiang ₁ , Hang Zhang ₁ , Xiuli Hou ₁ , Xin Gao ₁ , Qian Liu ₁

Affiliation

利用巧妙的光电极和创新的信号放大策略有可能在自供电阴极光电化学 (PEC) 分析中实现高灵敏度。在这项工作中，通过将巧妙的光电阴极与高光捕获光电阳极的协同信号放大相结合，构建了一种新型的自供电 PEC 传感平台。在基于双光电极的 PEC 系统中，放大的光电流信号是通过协同增强引起的：（1）掺入氮掺杂石墨烯提高了 BiOBr 光电阴极的光电流；(2) 自供电传感器的光电流被高光收集 Bi ₂ S ₃ –C ₃ N _4激活光电阳极。随后，研究了协同信号放大的合理机制。对于传感界面的构建，引入适体作为识别元件以特异性捕获链霉素（STR）靶标。在最佳条件下，构建的自供电适体传感器具有良好的线性范围（1 × 10 ^–11至 5 × 10 ^–7 M），可接受的检测限（1.18 × 10 ^–12M)，以及出色的 STR 检测稳定性和选择性。此外，所提出的自供电适体传感器在检测水中的 STR 方面表现出可接受的准确性。希望这会激发人们对设计和构建用于对环境中各种污染物进行精密光电阴极监测的新型平台的更多兴趣。

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Synergistic Signal Amplification-Initiated Innovative Self-Powered Photoelectrochemical Aptasensing: An Ingenious Photocathode Activated by the High-Light-Harvesting Photoanode

Exploiting ingenious photoelectrodes and innovative signal amplification strategies has the potential to achieve high sensitivity in self-powered cathodic photoelectrochemical (PEC) analysis. In this work, a novel self-powered PEC sensing platform was constructed by integrating a synergistic signal amplification of an ingenious photocathode with a high light-harvesting photoanode. In the dual photoelectrode-based PEC system, the amplified photocurrent signals were induced by a synergistic enhancement: (1) the photocurrent of the BiOBr photocathode was improved by the incorporation of nitrogen-doped graphene; (2) the photocurrent of the self-powered sensor was activated by the high-light-harvesting Bi₂S₃–C₃N₄ photoanode. Subsequently, the rational mechanism for synergistic signal amplification was investigated. For the construction of the sensing interface, an aptamer was introduced as the recognition element to specifically capture the streptomycin (STR) target. Under optimal conditions, the constructed self-powered aptasensor has the merits of good linear range (1 × 10^–11 to 5 × 10^–7 M), acceptable limit of detection (1.18 × 10^–12 M), and excellent stability and selectivity for STR detection. Additionally, the proposed self-powered aptasensor showed acceptable accuracy for the detection of STR in water. Hopefully, this might stimulate more interest in designing and constructing novel platforms for exquisite photocathodic monitoring of various contaminants in the environment.

更新日期：2023-04-25

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