Abstract：Granular activated carbon (AC) was used as substrate for fabricating of nano MnO2and SnO2-Sb-Mn loaded catalytic particulate electrodes with redox and thermal decomposition methods, respectively. The phase composition, micro-morphology and electrocatalytic activity of the newly prepared particles were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) techniques as well as electrochemical test. The results showed that the as-prepared manganese oxide was mainly shaped in α-MnO2and δ-MnO2, which fixed in AC pore edge. SnO2-Sb-Mn component exist as the solid solution distributed on the surface and in the pore structure of AC. The average size of the two crystal was 11.47 and 13.70nm. Metal oxide coatings could increase voltammetric charges during the cyclic voltammetry (CV) scanning process, and improve electrical catalytic activity of particle electrodes. Bulk electrolysis experiments in packed bed electrochemical reactor were conducted with simulated phenol wastewater. The experiments data displayed that the removal of phenol and COD concentration with MnO2/AC and SnO2-Sb-Mn/AC filling were better than that of virgin AC, higher current efficiency and lower energy consume would be realized. The removal ratio of phenol and COD on SnO2-Sb-Mn/AC particles was as high as 94.7%, 90.4% under 12mA/cm2current density during 140min purification, with concurrent ACE reached about 62.7% and Esp 20.3kWh/kgCOD.
伍波, 李鹏, 张波, 王立章. 负载型粒子电极电催化氧化苯酚的研究[J]. 中国环境科学, 2015, 35(8): 2426-2432.
WU Bo, LI Peng, ZHANG Bo, WANG Li-Zhang. Electro-catalytic performance of the activated carbon supported metal oxide as particulate electrode for phenol oxidation. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(8): 2426-2432.
