Related Experiment Video
Updated: Jun 15, 2026
08:57
Scalable Syntheses of Graphene Oxide and Reduced Graphene Oxide using Cascade Design Oxidation and Highly Basic Reduction Reactions
Published on: July 3, 2025
143
Temperature-Dependent Optical Properties of Oxidized Graphenes
Talia Tene1, Paola G Vinueza-Naranjo2, Yesenia Cevallos2,3
1Department of Chemistry, Universidad Técnica Particular de Loja, Loja 110160, Ecuador.
Nanomaterials (Basel, Switzerland)
|August 12, 2023
Summary
Synthesis parameters control graphene oxide (GO) and reduced graphene oxide (rGO) optical properties. Adjusting reduction time and temperature tunes optical bandgap and absorption for enhanced energy applications.
Area of Science:
- Materials Science
- Nanotechnology
- Optoelectronics
Background:
- Graphene oxide (GO) and reduced graphene oxide (rGO) are crucial nanomaterials with tunable optical properties.
- Understanding synthesis-dependent optical characteristics is key for advanced applications.
Purpose of the Study:
- To investigate the impact of synthesis parameters on GO and rGO optical properties.
- To correlate changes in optical transitions, bandgap, and absorption with synthesis conditions.
Main Methods:
- Systematic variation of drying and reduction times at different temperatures.
- Spectroscopic analysis (UV-Vis absorption) to determine optical bandgap and absorption coefficients.
- Morphological studies to support optical findings.
Main Results:
- Graphene oxide (GO) exhibits an optical bandgap of ~4 eV, reduced to ~1.9 eV in reduced graphene oxide (rGO).
- Both GO and rGO show enhanced visible spectrum absorption, improving photon capture.
- Higher absorption coefficients were observed compared to exfoliated graphene, attributed to defects and oxygen groups.
Conclusions:
- Synthesis parameters significantly influence GO and rGO optical properties.
- Optimized GO and rGO offer potential for efficient energy conversion applications.
- Defects and functional groups play a critical role in the enhanced optical absorption of GO and rGO.
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