Preparation and Performance of Sb-SnO2 / Ti Electrode Modified with Carbon Nanotubes

Abstract

In order to improve the electro-catalytic oxidation activity and stability of Sb-SnO2 /Ti electrode，the CNTs-Sb-SnO2 /Ti electrode was prepared by sol-gel-thermal decomposition method. The microstructure and electrochemical properties of the modified electrode was characterized via SEM electrochemical impedance spectroscope ( EIS) ，polarization curve and congo red degradation experiments. Furthermore，its the stability was investigated by accelerated life test. The results indicate that when the optimal doping amount of CNTs is 2. 0 g /L the congo red removal rate increases by 14. 7% using the CNTs-Sb-SnO2 /Ti electrode compared with the Sb-SnO2 /Ti electrode. Meanwhile pore structure appears and roughness increases on the surface of modified electrodes leading to larger specific surface area of electrode. Then the modified electrodes exhibit higher oxygen evolution potential and lower charge transfer resistance. Additionally，accelerated life tests reveal that the modified electrode has better electro-catalytic stability while the service life increases by

Keywords

• inorganic non-metalic material; Sb-SnO2 electrode; carbon nanotube; electro-catalytic activity