利用源自 NiO-MoS2 的电化学传感器以非酶方法传感 H2O2 和葡萄糖

IF 1.9 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Bulletin of Materials Science Pub Date : 2024-09-11 DOI:10.1007/s12034-024-03291-4
Ankush Medhi, Manas Kumar Giri, D Mohanta
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引用次数: 0

摘要

目前,选择性准确测定过氧化氢(H2O2)和葡萄糖已成为常规诊断的必要条件。本研究通过水热法合成了基于氧化镍纳米片(NS)-MoS2 的复合体系,用于 H2O2 和葡萄糖的非酶电化学检测。为了解所制备复合体系的结构、形态和元素成分,采用了多种表征技术,即 XRD、FTIR、FESEM、TEM 和 EDX。通过使用电化学技术:循环伏安法(CV)、电化学阻抗光谱法(EIS)和时变测量法,实现了基于 NiO-MoS2 的传感器电极对 H2O2 和葡萄糖的氧化还原活性和电荷转移过程。值得一提的是,在 0.1 M PBS 溶液中,H2O2 的检测限(LOD)和灵敏度分别为 3 µM 和 3925 µA mM-1 cm-2,线性范围为 5-455 µM。同样,在 0.1 M NaOH 溶液中,在 5-370 µM 的线性范围内,感应葡萄糖的 LOD 和灵敏度估计分别为 3.53 µM 和 1880 µA mM-1 cm-2。这种高性价比的传感器具有良好的稳定性和对特定分析物的高选择性。
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Non-enzymatic approach of H2O2 and glucose sensing using NiO–MoS2-derived electrochemical sensor

At present, selective and accurate determination of hydrogen peroxide (H2O2) and glucose has become essential for routine diagnosis. The present work demonstrates the hydrothermal synthesis of NiO nanosheet (NS)–MoS2-based composite system for non-enzymatic electrochemical detection of H2O2 and glucose. To understand the structure, morphology and elemental constituents of the prepared composite system, various characterization techniques were employed, namely XRD, FTIR, FESEM, TEM and EDX. Redox activity and charge transfer process of the NiO–MoS2-based sensor electrode towards H2O2 and glucose were realized via using electrochemical techniques: cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS) and chronoamperometry. To be mentioned, limit of detection (LOD) and sensitivity for detection of H2O2 are calculated to be 3 µM and 3925 µA mM−1 cm−2, respectively, under the linear range of 5–455 µM in 0.1 M PBS solution. Similarly, the LOD and sensitivity for sensing glucose is estimated to be 3.53 µM and 1880 µA mM−1 cm−2, respectively, under the linear range of 5–370 µM in 0.1 M NaOH solution. The cost-effective fabricated sensor exhibited good stability with a high selectivity towards the specific analytes only.

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来源期刊
Bulletin of Materials Science
Bulletin of Materials Science 工程技术-材料科学:综合
CiteScore
3.40
自引率
5.60%
发文量
209
审稿时长
11.5 months
期刊介绍: The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.
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