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- Title
Higher Electrical Conductivity of Functionalized Graphene Oxide Doped with Silver and Copper (II) Ions.
- Authors
Pereira, Nelson Gustavo Alves; Gonzaléz, Maria Elena Leyva; Queiroz, Alvaro Antonio Alencar de; Oliveira, Adhimar Flávio; Tavares Wanderley Neto, Estácio
- Abstract
This study presents a new methodology for graphene oxide (GO) synthesis through electrochemical exfoliation of graphite, followed by phthalic anhydride functionalization (PhA-GO) and doping with Cu 2 + and Ag + ions. The synthesis of GO involved the use of an electrochemical cell with H 2 SO 4 as the electrolyte, with a gradual increase in potential from 2.3 V to 10 V. Extensive characterization techniques confirmed the successful incorporation of oxygen-containing functional groups, verifying the oxidation of graphite. PhA-GO functionalization was confirmed by thermogravimetric analysis, Differential Scanning Calorimetry, Fourier-transform infrared spectroscopy (FTIR), UV-Vis spectroscopy, X-ray diffraction, scanning electron microscopy (SEM), and energy-dispersive spectroscopy (EDX), which confirmed the presence of Cu 2 + and Ag + ions. The Scherrer equation determined a grain size of 75.85 nm for GO. The electrical properties exhibited semiconductor and semimetal behavior, particularly in PhA-GO/Ag + composites, making them suitable for electronic devices over a wide temperature range, presenting a promising pathway for advanced materials in electronic applications.
- Subjects
ELECTRIC conductivity; SILVER oxide; GRAPHENE oxide; PHTHALIC anhydride; ELECTRIC batteries; IONS; SILVER; GRAPHENE synthesis
- Publication
Energies (19961073), 2023, Vol 16, Issue 20, p7019
- ISSN
1996-1073
- Publication type
Article
- DOI
10.3390/en16207019