Flexo-electrochemical Hg(II) sensor based on Ag/Nd-TMA MOF modified carbon cloth electrode: Surface adsorptive reaction mechanism utilizing X-ray photoelectron spectroscopy

IF 4.6 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Synthetic Metals Pub Date : 2025-04-01 Epub Date: 2025-01-17 DOI:10.1016/j.synthmet.2025.117833

Shubham S. Patil , Farhat U. Shaikh , Vijaykiran N. Narwade , Priyanka C. Zine , Pragati R. Kagne , Rajendra S. Sonkawade , Meng-Lin Tsai , Tibor Hianik , Mahendra D. Shirsat

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Abstract

This study addresses the electrochemical performance reliability of a silver-incorporated neodymium trimesic acid (Ag/Nd-TMA) metal-organic framework (MOF) immobilized on a flexible carbon cloth electrode (CC) and the reaction mechanism utilizing X-ray photoelectron spectroscopic (XPS) analysis. The incorporation of Ag/Nd-TMA onto the electrode surface was thoroughly characterized through X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). The electrode's remarkable flexibility was explored through both fold and no-fold experimental configurations, both of which demonstrated excellent differential pulse voltammetric (DPV) performance. The sensing platform exhibited a remarkable detection limit of 0.568 nM for Hg(II), underscoring its exceptional sensitivity (1.60 nM⁻¹) and repeatability with 0.47 % RSD. Moreover, utilizing the XPS method, the reaction mechanism revealed the surface adsorptive behaviour of the Ag/Nd-TMA electrode before and after DPV responses. This flexible Ag/Nd-TMA electrode showcases a promising avenue for highly sensitive and adaptable electrochemical sensing applications, particularly in the realm of environmental monitoring and trace metal analysis.

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基于Ag/Nd-TMA MOF修饰碳布电极的柔性电化学汞传感器：基于x射线光电子能谱的表面吸附反应机理

本研究利用x射线光电子能谱（XPS）分析了固定在柔性碳布电极（CC）上的银掺杂三聚钕酸（Ag/Nd-TMA）金属有机骨架（MOF）的电化学性能可靠性和反应机理。通过x射线衍射（XRD）、场发射扫描电镜（FESEM）、傅里叶变换红外光谱（FTIR）、拉曼光谱（Raman）、循环伏安法（CV）和电化学阻抗谱（EIS）对Ag/Nd-TMA在电极表面的掺入进行了全面表征。通过折叠和无折叠两种实验配置探索了电极的显著柔韧性，两种实验配置都表现出优异的差分脉冲伏安（DPV）性能。该传感平台对Hg（II）的检出限为0.568 nM，灵敏度为1.60 nM−1，重复性为0.47 % RSD。此外，利用XPS方法，揭示了DPV反应前后Ag/Nd-TMA电极的表面吸附行为。这种灵活的Ag/Nd-TMA电极展示了高灵敏度和适应性电化学传感应用的有前途的途径，特别是在环境监测和痕量金属分析领域。

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来源期刊

Synthetic Metals 工程技术-材料科学：综合

CiteScore

8.30

自引率

4.50%

发文量

189

审稿时长

33 days

期刊介绍： This journal is an international medium for the rapid publication of original research papers, short communications and subject reviews dealing with research on and applications of electronic polymers and electronic molecular materials including novel carbon architectures. These functional materials have the properties of metals, semiconductors or magnets and are distinguishable from elemental and alloy/binary metals, semiconductors and magnets.