Sun Jing, Cai Hemeiling, Ma Zhichang, Di Junwei
College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, 215123, PR China.
College of Chemistry, Chemical Engineering and Material Science, Soochow University, Suzhou, 215123, PR China.
Talanta. 2024 Jan 15;267:125228. doi: 10.1016/j.talanta.2023.125228. Epub 2023 Sep 21.
In this work, a photoelectrochemical sensor for Cu trace detection was prepared based on the excellent semiconductor material BiVO modified ITO electrode. It was found that Cu formed a doping effect by adsorption on the surface of ITO/BiVO electrode, which inhibited the photogenerated electron complex and thus caused an increase in photocurrent. In addition, due to the complexation effect of EDTA on Cu, the Cu adsorbed on the electrode surface is desorbed and the photocurrent returns to the blank value, making it possible to reuse electrodes. Under optimal conditions, the linearity range was measured between 0.1 pM and 0.1 μM and the detection limit was 0.063 pM. The PEC sensor exhibits the advantages of high sensitivity and reusability for Cu detection. This provides a novel PEC detection platform for Cu monitoring in environmental water samples.
在这项工作中，基于优异的半导体材料BiVO修饰的ITO电极制备了一种用于痕量铜检测的光电化学传感器。研究发现，铜通过吸附在ITO/BiVO电极表面形成掺杂效应，抑制了光生电子复合，从而导致光电流增加。此外，由于EDTA对铜的络合作用，吸附在电极表面的铜被解吸，光电流恢复到空白值，使得电极能够重复使用。在最佳条件下，测量得到线性范围为0.1 pM至0.1 μM，检测限为0.063 pM。该PEC传感器在铜检测方面具有高灵敏度和可重复使用性的优点。这为环境水样中铜的监测提供了一种新型的PEC检测平台。
