Structural and electrochemical properties of N-doped graphene–graphite composites

Q4 Chemistry

Voprosy Khimii i Khimicheskoi Tekhnologii Pub Date : 2022-12-01 DOI:10.32434/0321-4095-2022-145-6-61-67

R. Panteleimonov, О.V. Boichuk, K. Pershina, V. Ogenko

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引用次数: 0

Abstract

This work studied the impact of graphene content and heat treatment on the structural changes and electrical parameters of graphite/N-doped graphene mixtures. Using photoelectron spectroscopy the appearance of two types of carbon-containing phases was detected in the visible range of the N-doped graphene samples synthesized from liquid nitrogen. The following features of the samples were shown: one typical structure of graphene (sp2C–sp2C), two atypical structures (sp3C–N and the C–O bond), and graphene components modified with nitrogen (pyridine–N, pyrrole–N, graphite–N and oxidized N–O). The dependence between the ratio of components in graphite–graphene mixtures and their electrochemical properties was found. The effect of graphite content and heat treatment on the change in the type of conductivity in a graphite–graphene mixture was determined by comparison of resistance and capacitance distribution in the frequency range of 100–900 Hz. The change of the graphite concentration in the graphene–graphite mixture allows governing the type of doping and electrical parameters of the mixtures.

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n掺杂石墨烯-石墨复合材料的结构和电化学性能

本工作研究了石墨烯含量和热处理对石墨/ n掺杂石墨烯混合物结构变化和电学参数的影响。利用光电子能谱技术，在液态氮合成的n掺杂石墨烯样品的可见范围内检测到两种类型的含碳相。样品具有以下特征:一个典型的石墨烯结构(sp2C-sp2C)，两个非典型结构(sp3C-N和C-O键)，以及被氮修饰的石墨烯组分(吡啶- n、吡咯- n、石墨- n和氧化N-O)。发现了石墨-石墨烯混合物中各组分的配比与其电化学性能之间的关系。通过在100-900 Hz频率范围内电阻和电容分布的比较，确定了石墨含量和热处理对石墨-石墨烯混合物电导率类型变化的影响。石墨烯-石墨混合物中石墨浓度的变化可以控制掺杂类型和混合物的电参数。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Voprosy Khimii i Khimicheskoi Tekhnologii Chemical Engineering-Chemical Engineering (all)

CiteScore

0.90

自引率

0.00%

发文量

期刊介绍： Voprosy Khimii i Khimicheskoi Tekhnologii (Issues of Chemistry and Chemical Technology) is published bimonthly by the Ukrainian State University of Chemical Technology and accepts Ukrainian- or English language high-quality original articles and reviews concerning various fields of research in chemistry and chemical engineering. Our unusual title “Voprosy khimii i khimicheskoi tekhnologii” originates from the transliterated initial Russian title “Issues of Chemistry and Chemical Technology“. The fact of the matter is that Voprosy khimii i khimicheskoi tekhnologii was founded in 1965 as a scientific journal mainly for Russian-reading and Russian-speaking readership when «the Iron Curtain» existed. Since 1991, after Ukraine declared its independence, our Journal began to publish the articles in Ukrainian and English. Multilingualism is our established tradition. We remember and cherish our traditions, but we follow the latest trends in modern science. Papers that are multidisciplinary or address new or emerging areas of chemistry and chemical engineering are particularly encouraged. Thus, the scope is dynamic. It includes but is not limited to the traditional areas of general, inorganic, organic, analytical, physical chemistry and electrochemistry, as well as all conventional areas of chemical engineering (chemistry of high molecular compounds, technology of inorganic and organic substances, processing of combustible minerals, chemical technology of silicates, processes and apparatus of chemical productions, etc.). The Journal publishes papers dealing with newer interdisciplinary areas such as materials science, nano-science, catalysis, computational and theoretical chemistry, surface phenomenon and colloidal systems, environmental chemistry, green chemistry.