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 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Synthetic Metals Pub 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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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.