Journal of Inorganic Materials ›› 2017, Vol. 32 ›› Issue (11): 1159-1164.doi: 10.15541/jim20170053

• RESEARCH PAPER • Previous Articles     Next Articles

Carbon Aerogels Prepared Based on Sol-Gel Reaction of Cellulose Colloid with AEP and Its Adsorption of Copper Ions in Aqueous Solution

Lei ZHENG(), Jin LI(), Hong-Bo LIU   

  1. College of Material Science and Engineering, Hunan University, Changsha 410082, China
  • Received:2017-01-23 Revised:2017-04-19 Online:2017-11-20 Published:2017-10-20

Abstract:

A novel cellulose-based carbon aerogel with well-developed porous structure and surface group of hydroxyl was synthesized from cellulose aerogel by means of Sol-Gel reaction, freeze-drying and carbonization. In this preparation, cellulose was taken as carbon precursor and phosphate of polyoxyethylene isooctyl ether (AEP) was chosen as structure inducer of micelle in cellulose colloid. Thermal decomposition of the prepared cellulose aerogel was studied by TG technique; the properties of the prepared carbon aerogel, such as porous structure and function groups were characterized with SEM, N2 adsorption-desorption isotherms and Fourier-transform infrared spectroscopy (FT-IR). Adsorption of copper ion onto the test samples in aqueous solution was investigated through a static adsorption method. Results show that AEP can obviously regulate the porous structure and improve the adsorption performance of the prepared samples. The optimal sample of the prepared carbon aerogel possesses predominant pore structure of three-dimensional network, with a surface area of 655.4 m2/g and total pore volume of 0.73 cm3/g. The maximum copper ion adsorption capacity reached 86.27 mg/g in aqueous solution. In adsorption process, it is also found that the kinetics nicely follows pseudo-second-order rate expression, while the isotherm fits Langmuir model, displaying good adsorption properties. Therefore, the prepared carbon aerogel may have potential application in treatment of metal ion pollution in water. Meanwhile, the preparation strategies in this study provides a novel pathway for preparing carbon adsorbent with specific pore structure and functional groups on the surface.

Key words: cellulose, Sol-Gel, carbon aerogel, surfactant, copper ion

CLC Number: 

  • TQ174