TY - JOUR

T1 - Redox Processes in Reduced Graphite Oxide Decorated by Carboxyl Functional Groups

AU - Kobets, Anna A.

AU - Iurchenkova, Anna A.

AU - Asanov, Igor P.

AU - Okotrub, Aleksander V.

AU - Fedorovskaya, Ekaterina O.

PY - 2019/9/1

Y1 - 2019/9/1

N2 - The reduction of graphite oxide makes it possible to obtain a graphene material with a developed surface, high conductivity and remarkable electrochemical behavior. The study of the electrochemical activity of oxygen-containing functional groups on the graphene surface is important for the creation of electrochemical energy sources and sensors. In this work, the reduced graphite oxide is selectively decorated by carboxyl functional groups. The initial and carboxylated reduced graphite oxide are studied by SEM microscopy, FTIR, Raman, and X-ray photoelectron spectroscopy. It is shown that a large number of carboxyl groups added to reduced graphite oxide surface change the sample morphology. Studying of reduced graphite oxide and carboxylated reduced graphite oxide by cyclic voltammetry shows reversible redox processes, which is associated with oxidation and reduction of the hydroxyl, carbonyl, and carboxyl groups. In addition, the dependence of peak potentials on the pH value is studied.

AB - The reduction of graphite oxide makes it possible to obtain a graphene material with a developed surface, high conductivity and remarkable electrochemical behavior. The study of the electrochemical activity of oxygen-containing functional groups on the graphene surface is important for the creation of electrochemical energy sources and sensors. In this work, the reduced graphite oxide is selectively decorated by carboxyl functional groups. The initial and carboxylated reduced graphite oxide are studied by SEM microscopy, FTIR, Raman, and X-ray photoelectron spectroscopy. It is shown that a large number of carboxyl groups added to reduced graphite oxide surface change the sample morphology. Studying of reduced graphite oxide and carboxylated reduced graphite oxide by cyclic voltammetry shows reversible redox processes, which is associated with oxidation and reduction of the hydroxyl, carbonyl, and carboxyl groups. In addition, the dependence of peak potentials on the pH value is studied.

KW - cyclic voltammetry

KW - graphene functionalization

KW - oxygen-containing functional groups

KW - reduced graphite oxide

KW - X-ray photoelectron spectroscopy

KW - GRAPHENE OXIDE

KW - ELECTROCHEMICAL PROPERTIES

KW - CHEMICAL-REDUCTION

KW - PERFORMANCE

KW - RAMAN-SPECTROSCOPY

KW - SULFUR

KW - FILMS

KW - NANOTUBES

KW - ELECTRODE

KW - FABRICATION

UR - http://www.scopus.com/inward/record.url?scp=85062726443&partnerID=8YFLogxK

U2 - 10.1002/pssb.201800700

DO - 10.1002/pssb.201800700

M3 - Article

AN - SCOPUS:85062726443

VL - 256

JO - Physica Status Solidi (B): Basic Research

JF - Physica Status Solidi (B): Basic Research

SN - 0370-1972

IS - 9

M1 - 1800700

ER -