J. Mater. Sci. Technol. ›› 2020, Vol. 41: 68-75.DOI: 10.1016/j.jmst.2019.09.019

• Research Article • Previous Articles     Next Articles

A novel graphene aerogel synthesized from cellulose with high performance for removing MB in water

Jin Li*(), Qin Wang, Lei Zheng, Hongbo Liu   

  1. College of Material Science and Engineering, Hunan University, Changsha, PR China
  • Received:2019-06-25 Revised:2019-08-16 Accepted:2019-09-10 Published:2020-03-15 Online:2020-04-10
  • Contact: Li Jin

Abstract:

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 m2/g and total pore volume about 1.02 cm3/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.

Key words: Graphene aerogel, Synthesis, Biomass precursor, Function, Adsorbent