Graphene A Magical compound

What is graphene?

Graphene is a thin layer of pure carbon atoms which are tightly packed and bonded together in a hexagonal honeycomb-like structure.

What are different methods for production of graphene?

u  Liquid phase and thermal exfoliation

-          Graphite to graphene flakes using chemical solvent or thermal shocks

u  Synthesis on silicon carbide

-          Deposition of gaseous carbon atom on a silicon carbide

u  Chemical vapour deposition (CVD)

-          Deposition of gaseous carbon atom on a copper or other metal foils

Best method for production of high-quality graphene

Why is it called magical material?

u  Very light weight

u  It is stronger than steel

u  best conductor of electricity

u  Best conductor of heat at room temperature

u  It has unique absorption of white light

What are the problems so it is not used as so much commercially?

u  Production of Good quality graphene is very costly.

u  To make graphene toxic compounds are used, which affect the quality of produced graphene.

u  it is not yet possible to separate the graphene layer from its metallic substrate without damaging the graphene

Where it can be used?

u  Graphene is highly inert, it can act as corrosion barrier between oxygen and water

Means

 superb corrosion resistance

u  It can conduct electron faster than silicon that’s mean better processing power

u  We can see many electronic devices based on graphene

processor

Solar cells

Flexible display

u  For example, graphene oxide (a type of graphene) based fluorescent biosensors are simple, and have the higher signal intensity and lower background noises.

u  Due to higher strength, it can replace Kevlar in future.

u  Graphene and their Nanocomposites are also used for absorption of organic pollutants from water.

u  Graphene provides better catalyst loading and surface area hence can be used in selective catalytic reduction (SCR)

 (faster conversion of harmful pollutants into less harmful pollutants)