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Thermal reduction of graphite oxide in the presence of nitrogen-containing dyes

  • Carbon Letters
  • Abbr : Carbon Lett.
  • 2021, 31(6), pp.1097-1110
  • DOI : 10.1007/s42823-021-00228-3
  • Publisher : Korean Carbon Society
  • Research Area : Natural Science > Natural Science General > Other Natural Sciences General
  • Received : October 22, 2020
  • Accepted : January 19, 2021
  • Published : December 1, 2021

Barkauskas Jurgis 1 Gaidukevič Justina 2 Niaura Gediminas 2

1Center for Physical Sciences and Technology, Sauletekio av. 3, 10257, Vilnius, Lithuania
2Vilnius University

Accredited

ABSTRACT

Thermal reduction of graphite oxide (GO) is considered as a prospective method for the preparation of high-performance graphene-based materials. However, this method has certain limitations, and the major is that this exothermic process is diffcult to control. In this research, we focused on the kinetic studies of the reduction of graphite oxide using non-isothermal diferential calorimetry (DSC) method. Six GO nanocomposites with dyes were tested to study the shift in kinetic parameters. The apparent reaction order is determined to be ca 0.7 for the thermal decomposition of pure GO, while in the presence of dye molecules it increases sometimes reaching a value of 2.0 for higher dye concentrations. Decisively, the thermal decomposition of pure GO can be presented as an intermediate between a zero- and frst-order reaction, while the introduction of dye molecules turns a certain part of the energy consumption via the bimolecular pathway. Our research revealed that the process of GO thermal decomposition can be operated and properties of the fnal product (reduced graphene oxide (rGO) and its derivatives) can be adjusted more precisely using additive molecules, which interact with GO sheets.

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