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NaOH-assisted hydrothermal reduction of graphene oxide.
Kotsyubynsky, Volodymyr; Khimyak, Yaroslav Z; Zapukhlyak, Ruslan; Boychuk, Volodymyra; Turovska, Liliia; Hoi, Vladyslav.
Afiliación
  • Kotsyubynsky V; Department of Materials Science and New Technologies, Vasyl Stefanyk Precarpathian National University, 76018 Ivano-Frankivsk, Ukraine.
  • Khimyak YZ; School of Pharmacy, University of East Anglia, NR4 7TJ Norwich, United Kingdom.
  • Zapukhlyak R; Department of Computer Engineering and Electronics, Vasyl Stefanyk Precarpathian National University, 76018 Ivano-Frankivsk, Ukraine.
  • Boychuk V; Department of Materials Science and New Technologies, Vasyl Stefanyk Precarpathian National University, 76018 Ivano-Frankivsk, Ukraine.
  • Turovska L; Department of Medical Informatics, Medical and Biological Physics, Ivano-Frankivsk National Medical University, 76018 Ivano-Frankivsk, Ukraine.
  • Hoi V; Department of Materials Science and New Technologies, Vasyl Stefanyk Precarpathian National University, 76018 Ivano-Frankivsk, Ukraine.
J Phys Condens Matter ; 36(49)2024 Sep 10.
Article en En | MEDLINE | ID: mdl-39214133
ABSTRACT
The influence of the pH of the reaction medium on the structural characteristics of hydrothermally reduced graphene oxide, synthesized by the tour method, has been investigated. Varying the pH of the reaction medium within the range of 8.0, 10.0 and 12.0 (adjusted with NaOH) has revealed distinct effects on the morphology and properties of the resulting reduced graphene oxide. At a pH of 8.0 the hydrothermal treatment yielded reduced graphene oxide comprising of two particle fractions with a thickness equivalent to 4-5 graphitic layers each. In contrast, pH of 10.0 resulted in two particle fractions corresponding to 2-3 and 4 layers, respectively, while pH of 12.0 produced a single fraction with a particle thickness of 0.70 nm, encompassing 3 graphitic layers. Increasing the pH led to a decrease in the average lateral size of reduced graphene oxide particles to about 8 nm. All rGOs had micro- and mesopores with a specific surface area up to 226 m2g-1, showing a proportional increase in mesopores with increasing pH. Analysis of slit-like micropores revealed a minimum fractal dimension (D= 2.18) at pH = 8.0. The obtained results provide valuable insights into tailoring the structural properties of hydrothermally reduced graphene oxide by controlling the pH of the reaction medium, offering potential applications in various fields, including nanotechnology and materials science.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Phys Condens Matter Asunto de la revista: BIOFISICA Año: 2024 Tipo del documento: Article País de afiliación: Ucrania Pais de publicación: Reino Unido
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
Buscar en Google

Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Phys Condens Matter Asunto de la revista: BIOFISICA Año: 2024 Tipo del documento: Article País de afiliación: Ucrania Pais de publicación: Reino Unido