Mono- and Few-Layer Nitrogen-Containing Graphenes as Sensitive Layers of Electrochemical Sensors for Selective Determination of Dopamine and Uric Acid in the Presence of Ascorbic Acid

IF 0.7 4区化学 Q4 CHEMISTRY, MULTIDISCIPLINARY Theoretical and Experimental Chemistry Pub Date : 2022-08-25 DOI:10.1007/s11237-022-09728-3

O. A. Kozarenko, A. S. Kondratyuk, V. S. Dyadyun, V. L. Karbivskiy, V. G. Koshechko, V. D. Pokhodenko

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Abstract

A comparative study of electrochemical properties of mono- and few-layer samples of nitrogen-doped graphene as nanosized sensor materials for the qualitative and quantitative determination of dopamine and uric acid has been performed. It is found that the few-layer graphene (NGr(f)) is characterized by high sensibility to dopamine, while monolayer one (NGr(m)) is characterized by high sensibility to uric acid in presence of considerable concentrations of ascorbic acid. XPS results show that the nitrogen content is 8.3 at.% in NGr(f) and 6.2 at.% in NGr(m). The analysis of Raman spectra allows to establish, that NGr(f) and NGr(m) have a defective structure. NGr(f) is characterized mainly by edge defects, while NGr(m) is characterized by vacancies, what obviously predetermines the differences in electrochemical properties of these materials.

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单层和少层含氮石墨烯作为电化学传感器在抗坏血酸存在下选择性测定多巴胺和尿酸的敏感层

对比研究了氮掺杂单层和多层石墨烯样品作为纳米级传感器材料的电化学性能，用于多巴胺和尿酸的定性和定量测定。研究发现，少层石墨烯(NGr(f))的特点是对多巴胺高度敏感，而单层石墨烯(NGr(m))的特点是在存在相当浓度的抗坏血酸时对尿酸高度敏感。XPS结果表明，氮含量为8.3 at。%在NGr(f)和6.2 at。%，单位为NGr(m)。拉曼光谱分析表明，NGr(f)和NGr(m)具有缺陷结构。NGr(f)的主要特征是边缘缺陷，而NGr(m)的主要特征是空位，这显然预先决定了这两种材料电化学性能的差异。

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来源期刊

Theoretical and Experimental Chemistry CHEMISTRY, MULTIDISCIPLINARY-

CiteScore

1.60

自引率

10.00%

发文量

审稿时长

6-12 weeks

期刊介绍： Theoretical and Experimental Chemistry is a journal for the rapid publication of research communications and reviews on modern problems of physical chemistry such as: a) physicochemical bases, principles, and methods for creation of novel processes, compounds, and materials; b) physicochemical principles of chemical process control, influence of external physical forces on chemical reactions; c) physical nanochemistry, nanostructures and nanomaterials, functional nanomaterials, size-dependent properties of materials.