Preparation and electrocatalytic characteristics of ceramic ring particle electrodes loaded with Sb doped SnO₂

Quartz ceramic ring particle electrodes loaded with Sb doped SnO₂ were prepared by a dip coating method. The micrograph and the crystal phase structure of the particle electrodes were characterized by the scanning electron microscopy, energy dispersive X-ray spectroscopy and X-ray diffractometer. The electrocatalytic response parameters of particle electrodes were optimized via the treatment of herbicide wastewater. The particle electrodes prepared was loaded with Sb doped SnO₂, and the resultant aperture increased, which could favor the mass transfer and increase the electrocatalytic response efficiency. When the cell voltage was 10 V, the electrode spacing was 5 cm, the amount of electrolyte was 7 g/L and the amount of particle electrode was 55 g, the superior electrocatalytic performance in treatment of herbicide wastewater was obtained. After the treatment for 120 min, the chemical oxygen demand (COD) removal rate and energy consumption of three-dimensional (3D) electrode reactor is 68.0% and 24.3 (kW·h)/kg (COD), respectively. The electrocatalytic performance of 3D electrode reactor was better than that of two-dimensional electrode reactor.