Abstract: Porous carbons were prepared by using a sol-gel method with tetraethyl orthosilicate （TEOS） as the silica template and sucrose as carbon precursor and adding N,N- dimethyl formamide（DMF） as drying control chemical additive（DCCA）. SEM and N2 adsorption isotherms were used to test and characterize the pore structure of the as-prepared porous carbons. The results showed that DMF addition helped to make crack-free and fracture-free gel and the pore size distribution of resultant carbons ranged from 2 nm to 7 nm.