Provincial Key Laboratory of Oil & Gas Chemical Technology, College of Chemistry & Chemical Engineering, Northeast Petroleum University, Daqing, 163318, P. R. China.
Anal Methods. 2023 Feb 16;15(7):969-978. doi: 10.1039/d2ay01615j.
A ternary nanocomposite photoelectrode composed of cadmium sulfide (CdS), polyaniline (PANI), and bismuth vanadate (BiVO) was successfully designed by combining cyclic voltammetry (CV) with electrochemical deposition and high-temperature calcination. The first synthesized CdS/PANI/BiVO composite was used as a photoelectrochemical (PEC) monitoring platform for glutathione (GSH). The ternary CdS/PANI/BiVO nanocomposites exhibited higher PEC activity, which was attributed to the accelerated electron transfer by the loading of CdS and PANI, which enables the material surface to better adsorb the electrons separated by GSH, thereby oxidizing it into GSSH. The photoanodes were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), UV-vis diffuse reflectance spectroscopy, and photoelectrochemical experiments. Under the optimal experimental conditions, the BiVO electrode modified with CdS and PANI exhibited a linear response in the concentration range of 0.1-20 μM with a sensitivity of 0.669 μA mM cm and a detection limit of 40 nM. Moreover, the PEC sensor exhibits good reproducibility and long-term stability. In summary, the designed materials have excellent electrochemical properties, which make them ideal candidates for PEC detection of GSH.
一种由硫化镉 (CdS)、聚苯胺 (PANI) 和钒酸铋 (BiVO) 组成的三元纳米复合光电极，通过循环伏安法 (CV) 与电化学沉积和高温煅烧相结合成功设计。首次合成的 CdS/PANI/BiVO 复合材料被用作谷胱甘肽 (GSH) 的光电化学 (PEC) 监测平台。三元 CdS/PANI/BiVO 纳米复合材料表现出更高的 PEC 活性，这归因于加载 CdS 和 PANI 加速了电子转移，使材料表面更好地吸附 GSH 分离的电子，从而将其氧化成 GSSH。通过 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、紫外可见漫反射光谱和光电化学实验对光阳极进行了表征。在最佳实验条件下，修饰有 CdS 和 PANI 的 BiVO 电极在 0.1-20 μM 的浓度范围内呈现线性响应，灵敏度为 0.669 μA mM cm，检测限为 40 nM。此外，PEC 传感器还表现出良好的重现性和长期稳定性。总之，设计的材料具有优异的电化学性能，使其成为 GSH 的 PEC 检测的理想候选材料。
