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Graphene@Metal Nanocomposites by Solution Combustion Synthesis.
Alexander Khort1,2,3, Valentin Romanovski4,3, Vasilina Lapitskaya2
1KTH Royal Institute of Technology, Stockholm 10044, Sweden.
Inorganic Chemistry
|April 14, 2020
Summary
Researchers developed a fast solution combustion synthesis (SCS) for large-area graphene-metal nanocomposites. This method efficiently produces graphene-copper, graphene-nickel, and graphene-copper-nickel films for gas sensors.
Area of Science:
- Materials Science
- Nanotechnology
- Chemical Engineering
Background:
- Graphene (G) and metal-decorated graphene nanocomposites show significant promise for diverse applications.
- Efficient and rapid synthesis methods for these advanced materials are crucial for practical implementation.
Purpose of the Study:
- To introduce a novel, rapid solution combustion synthesis (SCS) technique for producing large-area graphene-metal nanocomposites.
- To investigate the formation mechanism, structural properties, and sensing capabilities of these synthesized nanocomposites.
Main Methods:
- Solution combustion synthesis (SCS) using metal nitrates (copper, nickel) and citric acid as fuel and carbon source.
- Synthesis performed in an air atmosphere to create graphene-metal nanocomposites (G@Cu, G@Ni, G@CuNi).
- Characterization of phase composition, structural features, and magnetic properties.
Main Results:
- Successfully synthesized large-area, free-standing graphene-metal nanocomposite films via a high-energy SCS process.
- Graphene structures formed catalytically on newly synthesized metallic nanograins during combustion.
- Detailed analysis of the phase composition, structure, and magnetization of G@Cu, G@Ni, and G@CuNi.
Conclusions:
- The proposed SCS method offers a fast and effective route for producing graphene-metal nanocomposites.
- These G@metal nanocomposites demonstrate potential as highly effective sensing elements for semiconductor gas sensors.
