Activated carbon is a type of carbon that has been specially treated by heating organic materials (such as fruit shells, coal, wood, etc.) under isolated air conditions to reduce non carbon components (this process is called carbonization), and then reacting with gas to corrode the surface and produce a structure with well-developed micropores (this process is called activation). Due to the fact that the activation process is a microscopic process, where a large amount of molecular carbides corrode the surface in a point like manner, numerous small pores are formed on the surface of activated carbon. The diameter of micropores on the surface of activated carbon is mostly between 2-50nm. Even a small amount of activated carbon has a huge surface area, with a surface area of 500-1500m2 per gram of activated carbon. Almost all applications of activated carbon are based on this characteristic of activated carbon.