| 초록 |
Adsorption isotherms of NaCl on activated carbon cloth (ACC) and titania-incorporated ACC (Ti-ACC) under electric field were investigated to deduce the role of titania for the capacitive deionization (CDI) of NaCl. Electrosorption of NaCl on the ACC significantly increased by titania incorporation, whereas its physical adsorption was considerably decreased, resulting in an improved performance of the Ti-ACC as a CDI electrode. Langmuir isotherms based on localized and fixed amount of adsorption were suitable for the simulation of electrosorption and physical adsorption of ions on the ACC electrodes. The variances of qm and b of Langmuir isotherms with electric potential indicate increases in the number of ions per adsorption site and in electrosorption strength of ions by titania incorporation. A cyclic voltammetric study for the ion adsorption on ACC electrodes confirms the reversibility between electrosorption and desorption of ions, regardless of titania incorporation. |
