Activated carbons based on biomass: synthesis, designing, and applications

The rapid development of technology and in the past decades has caused the reduction of fossil fuelreserves and the increase of environmental pollution, the growth of the population and the increasing needto use electrical devices these days, prompted the society to replace the storage and conversion of energyfrom renewable sources. with energy from fuels such as coal and crude oil, for this purpose porous carbonas a new type of sustainable material with high performance, which generally, by using carbonization ofbiomass at high temperature and activation with suitable activating agents, creates Advantages such asincreased porosity, large specific surface area, good graphic grade for better electrochemical performance.(Fig. ۱). Activated carbon is a vital material with various applications such as catalytic support, pollutantremoval, battery electrodes, capacitors, gas storage, etc. and these applications require carbon powderswith desirable properties such as surface, chemical components, and pore structure (Fig. ۱). According tostudies conducted among different biomass, walnut shell has shown great potential as a precursor ofactivated carbon. Also, regardless of the type of biomass between different chemical activating agents,activation with KOH has created a high BET Surface.