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Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions
Published on: July 3, 2025
143
Optical properties of graphene oxide
Talia Tene1, Marco Guevara2, Freddy Benalcázar Palacios3
1Department of Chemistry, Universidad Técnica Particular de Loja, Loja, Ecuador.
Frontiers in Chemistry
|August 7, 2023
Summary
Investigating graphene oxide (GO) optical properties reveals drying duration significantly impacts its bandgap and electronic transitions. Extended drying reduces the optical bandgap, enhancing GO
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Graphene oxide (GO) optical properties are key for functionalized materials in sensors, optoelectronics, and energy storage.
- Understanding GO's electronic transitions and optical bandgap is crucial for material design.
Purpose of the Study:
- Investigate the electronic transitions, optical bandgap, and absorption coefficient of GO.
- Examine the effects of varying drying times and temperatures on GO's optical characteristics.
Main Methods:
- Studied GO under different drying times (0-120 h) at 80°C.
- Analyzed GO at low temperatures (40-100°C) with a fixed drying time (24 h).
- Characterized elemental composition, surface morphology, and electrical properties.
Main Results:
- Drying GO for up to 120 h at 80°C reduced the optical bandgap from 4.09 to 2.76 eV.
- The transition shifted from 230 nm to 244 nm after 120 h drying.
- Measured absorption coefficients (3140-5507 ml mg-1 m-1) were up to two times higher than exfoliated graphene dispersions.
Conclusions:
- Drying conditions critically influence GO's optical and electronic properties.
- Findings provide a basis for optimizing GO reduction for specific applications.
- Enhanced optical properties suggest potential for advanced optoelectronic devices.
