Research progress on preparation of chitosan-based biochar and its applications in energy storage and environmental governance
Transformation of biowaste into N-doped biochar conforms to a concept of green chemistry and also shows good prospects in energy storage and environmental governance.Among them,the precursor type is the key point for the production of high-performance nitrogen-doped biochar.Chitosan,as the only sole polysaccharide with amine-based groups in nature,is an excellent precursor for nitrogen-doped biochar.In situ N-doped can be achieved in biochar through a thermo-chemical process under inert atmosphere.Recent developments on preparation methods of chitosan-based nitrogen-doped biochar and its applications,including supercapacitor,electro-catalysis,CO2 capture and water treatment,were discussed.The effects of surface areas,pore structures and nitrogen-containing functional groups of biochar on the application performances were analyzed.The characteristics,advantages and key issues faced in practical applications of nitrogen-doped biochar were discussed.It can provide certain references for designing high-performance nitrogen-doped biochar and broadening its potential applications.
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