Related Experiment Video
Updated: Jun 10, 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
Improved synthesis of graphene oxide
Daniela C Marcano1, Dmitry V Kosynkin, Jacob M Berlin
1Department of Chemistry, and the Smalley Institute for Nanoscale Science and Technology, Rice University, MS 222, 6100 Main Street, Houston, Texas 77005, USA.
ACS Nano
|August 25, 2010
Summary
A new graphene oxide (GO) preparation method enhances oxidation efficiency and yield without toxic gases. The resulting chemically converted graphene (CCG) maintains electrical conductivity, ideal for large-scale production.
Area of Science:
- Materials Science
- Chemical Engineering
- Nanotechnology
Background:
- Hummers' method is the standard for graphene oxide (GO) synthesis.
- This method involves potassium permanganate (KMnO(4)), sodium nitrate (NaNO(3)), and sulfuric acid (H(2)SO(4)).
- Limitations include toxic gas generation and temperature control challenges.
Purpose of the Study:
- To develop an improved, safer, and more efficient method for graphene oxide preparation.
- To enhance the yield and hydrophilicity of graphene oxide.
- To assess the properties of chemically converted graphene (CCG) derived from the new GO synthesis.
Main Methods:
- Modified Hummers' method excluding NaNO(3).
- Increased KMnO(4) concentration.
- Reaction conducted in a 9:1 mixture of H(2)SO(4)/H(3)PO(4).
Main Results:
- Achieved higher yield of hydrophilic graphene oxide compared to standard Hummers' method.
- GO produced is more oxidized but yields CCG with equivalent electrical conductivity after reduction.
- Eliminated toxic gas byproduct and improved temperature control.
Conclusions:
- The modified method offers a more efficient and safer route for graphene oxide synthesis.
- This improved process is suitable for large-scale graphene oxide production.
- The resulting CCG is viable for device construction due to comparable electrical properties.
