Graphene and Graphene Oxide: Comparative Analysis of Advanced Carbon Nanomaterials

Author : Ada

Update time : 2024-12-27 16:25:15

Graphene is a single layer of carbon atoms arranged in a two-dimensional honeycomb lattice. Its excellent mechanical strength, thermal and electrical conductivity, and large surface area make it a material with extraordinary potential. The sp ² of carbon atoms in graphene forms a rigid planar structure, with π electrons delocalized throughout the entire graphene sheet, which contributes to its significant electronic properties.

Graphene

Oxidized graphene is derived from graphite through a series of oxidation processes that introduce oxygen-containing functional groups such as hydroxyl (- OH), epoxy (C-O-C), carboxyl (- COOH), and carbonyl (C=O) into the basal and edges of graphene sheets. Compared to the original graphene, these functional groups significantly alter the physical and chemical properties of GO. For example, GO is hydrophilic and can be easily dispersed in water and organic solvents, which is different from graphene, which tends to aggregate due to strong van der Waals forces between layers.

Oxidized graphene

Graphene has unparalleled mechanical properties and is one of the strongest materials known to have a tensile strength exceeding 130 GPa. Its high elasticity allows for significant deformation before failure, making it an ideal choice for flexible electronic and structural composite materials. In contrast, due to the presence of defects introduced by oxygen-containing groups, GO has lower mechanical strength, but when used as a reinforcing agent, it is still relatively strong and can improve the mechanical properties of composite materials. In terms of electricity, graphene exhibits excellent conductivity due to its continuous π - π-conjugated system, enabling efficient charge carrier transport. However, the conductivity of GO sharply decreases because the oxygen functional group breaks the π conjugation and generates localized states within the bandgap. However, GO can restore a certain degree of conductivity through chemical or thermal reduction, converting it into reduced graphene oxide (rGO).

Parameter	Description/Value
Product Name	Graphene
Chemical Composition	Pure carbon (C)
Form	Powder, dispersion, or film
Thickness (nm)	~0.34 (single layer)
Lateral Size (μm)	Varies; can be micrometer to millimeter scale
Specific Surface Area (m²/g)	High, up to 2630 m²/g
Electrical Conductivity (S/m)	Very high, up to 10⁸ S/m at room temperature
Thermal Conductivity (W/m·K)	Extremely high, up to 5000 W/m·K
Purity (%)	>99%
Oxygen Content (%)	<0.5%
Application Fields	Electronics, composites, energy storage, etc.
Packaging	Varies by supplier
Storage Conditions	Dry, away from direct sunlight

Graphene Product Specifications

Parameter	Description/Value
Product Name	Graphene Oxide
Chemical Composition	Carbon (C), Oxygen (O)
Form	Powder, dispersion
Thickness (nm)	~1 (single layer)
Lateral Size (μm)	Varies; typically smaller than graphene
Specific Surface Area (m²/g)	Moderate, depends on preparation method
Electrical Conductivity (S/m)	Low to moderate, can be increased by reduction
Thermal Conductivity (W/m·K)	Lower than graphene
Oxygen Content (%)	High, typically 20-50%
Functional Groups	Hydroxyl (-OH), epoxy (-O-), carboxyl (-COOH) groups
Solubility	Soluble in water and many organic solvents
Application Fields	Coatings, sensors, biomedicine, electronics
Packaging	Varies by supplier
Storage Conditions	Dry, avoid moisture

Graphene Oxide Product Specifications

Graphene and oxidized graphene have a wide range of applications in various fields:
Electronics: Graphene's superior electrical properties make it suitable for high-frequency transistors, transparent conductive films, and flexible displays. Despite its low conductivity, GO is an effective precursor for manufacturing rGO, which can be used in supercapacitors and lithium-ion batteries.
Energy storage: Due to its high surface area and excellent conductivity, graphene enhances the performance of electrodes in batteries and supercapacitors. When GO is reduced, it also promotes these applications by providing a larger active surface area for electrochemical reactions.
Composite materials: Incorporating graphene into polymer matrices can significantly improve mechanical strength, thermal stability, and conductivity. GO, due to its easy dispersion, helps to evenly distribute composite materials evenly, thereby improving overall performance.
Biomedical applications: Both materials show promising prospects in drug delivery systems and biosensors. The hydrophilicity and biocompatibility make it particularly attractive for biomedical applications, where it can be functionalized with targeted ligands or therapeutic agents.

Graphene and graphene oxide represent two aspects of the same revolutionary material category, each with unique advantages and facing unique challenges. Although graphene exhibits excellent mechanical strength and conductivity, GO shines brightly in terms of multifunctionality, dispersibility, and chemical modification potential. With the advancement of research and the emergence of innovative solutions, these materials will continue to drive technological progress and shape the future of multiple industries. Through collaboration between scientists, engineers, manufacturers, and policymakers, we can unleash the full potential of graphene and graphene, ensuring that they make a positive contribution to the advancement of materials science and technology.

Supplier

TRUNNANO is a globally recognized manufacturer and supplier of compounds with more than 12 years of expertise in the highest quality nanomaterials and other chemicals. The company develops a variety of powder materials and chemicals. Provide OEM service. If you need high quality graphene oxide, please feel free to contact us. You can click on the product to contact us. ([email protected])

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