铜
电极
光电流
氧化铟锡
光电化学
扫描电子显微镜
氧化铜
铟
化学
无机化学
分析化学(期刊)
电化学
材料科学
光电子学
色谱法
物理化学
复合材料
有机化学
作者
Jiexia Chen,Guang‐Chao Zhao,Yan Wang,Dexiang Feng,Hailong Zhang
标识
DOI:10.1016/j.electacta.2021.137736
摘要
A photoelectrochemical (PEC) sensor for determination of copper (II) ion has been developed. The indium tin oxide (ITO) electrode modified by ZnS quantum dots (QDs) was used as working electrode and dopamine (DA) as detection solution. When different amounts of Cu2+ were added, the polydopamine-copper (II) complex (PDA-Cu (II)) was in suit formed and attached tightly to the surface of ITO electrode based on the interaction between copper (II) and dopamine (DA) under weakly alkaline (pH 8.00) solution. The detection of Cu2+ was achieved by means of the decreasing photocurrent. The linear range of 1 - 1000 pM and sensitivity of 0.45 pM were obtained. In addition, the formation of PDA-Cu (II) was characterized by Scanning Electron Microscopy (SEM) and Energy Dispersive Spectroscopy (EDS). Thus, a PEC sensor based on the change of electrode surface state can realize the sensitive detection of Cu2+.
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