摘要
A novel graphene aerogel has been synthesized from cellulose by an easy way through sol-gel reaction and carbonization.In this route,it can be found the products have a high yield about 48%and form a specific porous networks assembled by graphene flake.The product sample like CGA-2,characteristic of a specific area about 1426.11 m^2/g and total pore volume about 1.02 cm^3/g,exhibits a remarkable performance for removing cationic dye like methylene blue(MB)in water.Of which the maximal MB adsorption capacity can be found about 610.85 mg/g in a neutral solution and 1.2 g/g in a basic solution.Under the condition of initial MB concentration of 100 mg/L and pH of 7.0,the adsorption equilibrium can be achieved on CGA-2 in 10 min,with MB removal ratio about 99%.In the MB adsorption on CGA-2,the isotherm fits Langmuir model with correlation coefficient of 0.9905,and the kinetics follows pseudo-second-order model with correlation coefficient of 0.9999.
A novel graphene aerogel has been synthesized from cellulose by an easy way through sol-gel reaction and carbonization. In this route, it can be found the products have a high yield about 48 % and form a specific porous networks assembled by graphene flake. The product sample like CGA-2, characteristic of a specific area about 1426.11 m^2/g and total pore volume about 1.02 cm^3/g, exhibits a remarkable performance for removing cationic dye like methylene blue(MB) in water. Of which the maximal MB adsorption capacity can be found about 610.85 mg/g in a neutral solution and 1.2 g/g in a basic solution. Under the condition of initial MB concentration of 100 mg/L and pH of 7.0, the adsorption equilibrium can be achieved on CGA-2 in 10 min, with MB removal ratio about 99 %. In the MB adsorption on CGA-2, the isotherm fits Langmuir model with correlation coefficient of 0.9905, and the kinetics follows pseudo-second-order model with correlation coefficient of 0.9999.
基金
supported by open fund from Hunan province key laboratory for advanced carbon materials and applied technology,Hunan University.
