Abstract:The CNT/TiO2 composite electrode prepared by coating method was activated with radio frequency inductively coupled air-plasma. The surface morphology, wetting ability and surface elements of the plasma activated electrode were characterized by scanning electron microscopy (SEM), contact angle and X-ray photoelectron spectroscopy (XPS), respectively. It was found that the pore ratio, hydrophilic property, contents of TiO2 and oxygen containing groups on the surface of the electrode increased after the activation, which facilitated the adsorption of phenol. Cyclic voltammetry (CV) result indicated that its specific capacity also increased by 54% with the plasma treatment. Further, phenol removal efficiency for the activated electrode was enhanced by 45% compared to that of the raw electrode, and the removal of phenol increased as the increase of applied voltage and initial concentration. The adsorption process followed the pseudo-second-order kinetic model and the equilibrium adsorption isotherm well fitted the Langmuir model.
施周, 杨文浩, 杨灵芳, 邓林. 等离子改性CNT/TiO2电极吸附去除水中苯酚的研究[J]. 中国环境科学, 2015, 35(9): 2664-2669.
SHI Zhou, YANG Wen-Hao, YANG Ling-Fang, DENG Lin. Electrosorption of phenol in aqueous solution using a plasma-activated CNT/TiO2 electrode. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(9): 2664-2669.