NaCl adsorption in multi-walled carbon nanotubes

Three kinds of multi-walled carbon nanotube electrodes were fabricated in electrochemical double layer capacitors to adsorb Na+ and Cl- from NaCl solution. The amount of ions adsorbed by electrodes depends on the specific surface area, pore specific volume. The specific NaCl adsorption was investigated, it was found that purified carbon nanotube electrode after carbonization is the best NaCl adsorption electrode with the largest specific surface area and pore specific volume, the percentage of NaCl desorption is nearly 90%, and the regeneration property of the electrode was also studied in this paper. (c) 2005 Elsevier B.V. All rights reserved.