The Research Progress on Method of Preparation of Biomass Charcoal and Modification

As a new environmental friendly material, the preparation and modification of biomass charcoal has become more and more popular in environmental science and other research field. Preparation techniques and the mechanism of activation of various methods were introduced in this paper. Carbonization and activation were two key classical methods to prepare biomass activated carbon. Now activated carbon was modified by changing the physical properties of surface structural, surface chemical and electrochemical properties. Electrochemical modification method would be the most prospective. Some ideas were provided to promote the application of biochar.