Applications of Graphene Derivatives
Graphene derivatives, such as reduced graphene oxide (rGO), expanded graphene and graphene quantum dots, are a major class of carbon nanomaterials that have a wide range of applications. These include electrochemically active materials, lubricants, and polymers. Graphene derivatives are mainly used in polymer nanocomposites as fillers, and also as an additive to enhance the performance of the end product.
rGO is an ideal material for use in nano-lubricants due to its high surface energy and reactivity with fatty acids, lipids, fatty alcohols, and polyunsaturated fatty acids. It exhibits superior anti-wear properties and can be used as a coating filler for synthetic engine oils against thermal and mechanical degradation.
It is an ideal nano-additive, as it has a layered surface morphology and can be functionalized with nitrogen doping to increase its reactivity. It can be incorporated into a variety of polymers, and it is a natural alternative to existing carbon-based additives in terms of cost.
Expanded graphite is a two-dimensional material made of sp2- hybridized carbon atoms arranged in a regular hexagonal pattern. It has the unique ability to absorb only 2.3% of the light that reaches its surface, making it a highly efficient material for optical applications.
It is possible to synthesize GO from used posting cover by pyrolyzing the carbon source in the presence of urea and Argon gas atmosphere at high temperature (1200-1400 degC). The obtained product has been characterized by XRD, SEM and TEM. The GO derivative exhibits a layered surface morphology, has a higher surface area and a higher nitrogen doping content than the pure carbon source.
