首页|Synthesize C@SiO2 with independent spaces produced from carbon slices by the confinement of the silica shell for toluene adsorption
Synthesize C@SiO2 with independent spaces produced from carbon slices by the confinement of the silica shell for toluene adsorption
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NSTL
Porous carbons with controlled pore structure have attracted great interest owing to their excellent applicatior potential.Herein,we report a simple synthetic route to synthesize the core-shell C@SiO2 spheres with various pore structures by calcining core-shell structured RF@SiO2(RF = resorcinol-formaldehyde resin).The obtained C@SiO2 spheres had high surface areas(238.5-732.5 m~2/g),large pore volume(0.111-0.647 cm~3/g)and abundant micro-mesoporous structure.The mesopore size of C@SiO2 spheres can be easily turned in the range oi 8-15 nm,by simply modifying the carbonization temperature,size and heating rate of RF@SiO2 spheres.Among these,S-C@SiO2-400 spheres had higher mesopore volume of 0.207 cm~3/g,this was related to internal carbon slices structure.Meantime,the toluene adsorption capacity of S-C@SiO2-400 spheres could reach 448.2 mg/g,which increased by 88.73% compared to ordinary carbon spheres.Moreover,the formation mechanism of the mesopore carbon slices structure was evaluated based on controlled experiments.This work provides a new synthetic method of micro-mesoporous carbon spheres,which can further enrich the application of carbon materials.
NSTL
