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Updated: Jun 27, 2026
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Synthesis and Functionalization of 3D Nano-graphene Materials: Graphene Aerogels and Graphene Macro Assemblies
Published on: November 5, 2015
Anisotropic Graphene Oxide Aerogels for Vegetable Oil Absorption.
Daniel Ordóñez Oviedo1, Nelly Maria Rosas-Laverde1, Arturo Barjola2
1Department of Materials, Escuela Politécnica Nacional, Quito 170524, Ecuador.
Materials (Basel, Switzerland)
|June 26, 2026
Summary
Highly porous reduced graphene oxide aerogels effectively remove oils from wastewater. Tailored synthesis yields anisotropic aerogels with enhanced oil sorption rates and capacities, crucial for environmental cleanup.
Area of Science:
- Materials Science
- Environmental Science
- Chemical Engineering
Background:
- Oil spills pose significant environmental threats.
- Porous sorbents offer efficient and recyclable wastewater treatment solutions.
- Reduced graphene oxide aerogels exhibit promising sorption properties.
Purpose of the Study:
- To synthesize and characterize anisotropic reduced graphene oxide aerogels.
- To investigate the oil sorption performance of these aerogels.
- To correlate aerogel properties with sorption efficiency.
Main Methods:
- Hydrothermal reduction and lyophilization for aerogel synthesis.
- Controlled addition of ethylenediamine and hydrothermal conditions to tune porosity.
- Characterization via scanning electron microscopy, Raman spectroscopy, and energy-dispersive X-ray analysis.
- Sorption measurements using canola and olive oil at various temperatures.
Main Results:
- Anisotropic reduced graphene oxide aerogels with controlled porosity and reduction gradients were successfully synthesized.
- Maximum gravimetric absorption capacity reached 156 g/g at 60 °C.
- Absorption rate increased significantly with temperature, reaching 15 g/g/s within 10 seconds.
- Sorption performance was influenced by the combined porosity and functionalization gradients.
Conclusions:
- Anisotropic gradient aerogels can be fabricated by adjusting synthesis parameters.
- These aerogels demonstrate excellent potential for oil sorption, particularly for viscous oils.
- Tailored aerogel synthesis offers a promising strategy for effective oil spill remediation.
