基于电沉积镍钴硫化物纳米片阵列的固态接触聚合物膜离子选择性电极。

Solid-contact polymeric membrane ion-selective electrodes based on electrodeposited NiCoS nanosheet arrays.

作者信息

Li Yanhong, Li Jinghui, Qin Wei

机构信息

CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research (YIC), Chinese Academy of Sciences (CAS), Shandong Key Laboratory of Coastal Environmental Processes, YICCAS, Yantai, Shandong, 264003, PR China; University of Chinese Academy of Sciences, Beijing, 100049, PR China.

出版信息

Talanta. 2023 Jan 1;251:123797. doi: 10.1016/j.talanta.2022.123797. Epub 2022 Aug 5.

DOI:10.1016/j.talanta.2022.123797

PMID:35970122

Abstract

In situ growth of quasi-superhydrophobic porous NiCoS nanosheet arrays with a one-step electrodeposition method was provided. A calcium ion-selective electrodes (Ca-ISE) was subsequently constructed by using the prepared NiCoS as a solid contact layer. The proposed Ca-ISE exhibits a good Nernstian slope of 30.7 ± 0.3 mV/dec and a detection limit of 1.6 × 10 M. Due to the large redox capacitance of 1.8 mF, the Ca-ISE based on NiCoS nanosheet arrays shows a high potential stability of 1.9 ± 0.5 μV/h over 90 h. Excellent reproducibilities for the NiCoS-based Ca-ISEs can be obtained with the single batch and batch-to-batch E° standard deviations of 0.3 (n = 6) and 0.7 mV (n = 5), respectively. The NiCoS nanosheet arrays have a large contact angle of 148 ± 1.4, which effectively suppresses the formation of a water layer at the sensing membrane/NiCoS interface.

摘要

提出了一种通过一步电沉积法原位生长准超疏水多孔NiCoS纳米片阵列的方法。随后，使用制备的NiCoS作为固体接触层构建了钙离子选择性电极（Ca-ISE）。所提出的Ca-ISE表现出良好的能斯特斜率，为30.7±0.3 mV/dec，检测限为1.6×10 M。由于具有1.8 mF的大氧化还原电容，基于NiCoS纳米片阵列的Ca-ISE在90小时内显示出1.9±0.5 μV/h的高电位稳定性。基于NiCoS的Ca-ISE具有出色的重现性，单次批次和批次间的E°标准偏差分别为0.3（n = 6）和0.7 mV（n = 5）。NiCoS纳米片阵列具有148±1.4的大接触角，有效地抑制了传感膜/NiCoS界面处水层的形成。