College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Key Laboratory of Molecular and Nano Probes, Ministry of Education, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Shandong Normal University, Jinan, 250014, People's Republic of China.
Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, 264003, People's Republic of China.
Mikrochim Acta. 2018 Apr 21;185(5):258. doi: 10.1007/s00604-018-2799-1.
Anodic stripping voltammetric determination of copper ions was accomplished at a glassy carbon disk electrode modified with core-shell microspheres of the gold@manganese dioxide (Au@MnO) type. These were synthesized via electrochemical deposition. The gold nanoparticles (AuNPs) were electrochemically deposited and employed as an active support material for the growth of MnO to yield Au@MnO core-shell particles with unique and regular spherical morphology. The microspheres have a diameter of 200-250 nm and scrolled edges like a cactus. Due to the absorption capacity of MnO and the electrocatalytic ability of the AuNPs, an excellent anodic signal is obtained for copper ions. Response is linear in the 20 nM to 1 μM copper ion concentration range, with a 4.9 ± 0.2 nM (n = 3) detection limit under optimized conditions. The electrode is stable and excellently reproducible. It was successfully applied to the analysis of copper ions in spiked seawater samples. Graphical abstract Gold nanoparticles were employed as a coupling medium for the bridging of MnO on a glassy carbon disk electrode to transfer electrons that enhanced electrochemical detection of copper ions.
采用金@二氧化锰（Au@MnO）核壳微球修饰玻碳圆盘电极，实现了对铜离子的溶出伏安测定。这些微球是通过电化学沉积合成的。金纳米粒子（AuNPs）通过电化学沉积并用作 MnO 生长的活性支撑材料，从而得到具有独特且规则球形形态的 Au@MnO 核壳颗粒。这些微球的直径为 200-250nm，边缘卷曲，像仙人掌。由于 MnO 的吸附能力和 AuNPs 的电催化能力，铜离子得到了极好的阳极信号。在优化条件下，响应在 20 nM 至 1 μM 铜离子浓度范围内呈线性，检测限为 4.9 ± 0.2 nM（n = 3）。该电极稳定且重现性极好。它成功地应用于加标海水中铜离子的分析。 示意图 金纳米粒子被用作玻碳圆盘电极上 MnO 桥接的连接介质，以传递电子，从而增强了铜离子的电化学检测。
