Tea waste biomass-derived microporous carbon for improved microwave absorption

Biomass-derived carbon materials with tailored porosities are attracting significant attention for their promising application in microwave absorption owing to their inherent sustainability and unique structural characteristics. This work investigates the effect of porosity on the microwave adsorption of biomass-derived carbon. Microporous carbon with varying porosities was successfully prepared from green tea waste, and the porous microstructure was systematically modified, with surface areas ranging from ~ 470 to ~ 660 m 2 g −1 , by carbonizing at various temperatures. Porous carbon with optimized porosity exhibits remarkable microwave absorption performance, achieving a minimum reflection loss of − 47.60 dB at a thickness of 2.2 mm and an effective absorption bandwidth (RL