【摘要】 为解决Al阳极电絮凝体系氧化作用弱、阳极钝化问题，构建由Al阳极和SnO₂-Sb阳极并列的双阳极电化学体系。通过水热法结合氢氟酸刻蚀制备Ti/SnO₂-Sb阳极并优化工艺参数，采用扫描电子显微镜、X射线衍射仪、电化学工作站等测试手段评估电极材料形貌及性能，探索靛蓝染色废水的双阳极电絮凝处理效果。结果表明，水热反应9 h、HF刻蚀2 min,Ti/SnO₂-Sb电极析氧过电位达1.605 V，表面形成均匀球状SnO₂-Sb固溶体涂层，Sn、Sb元素分布均匀。Ti/SnO₂-Sb阳极置于Al阳极和石墨阴极中间时，废水COD和TOC去除率较单一Al阳极体系提高了13.5%和9.5%，比能耗降低了28.4%。双阳极体系中Al电极的腐蚀电位更低、塔菲尔斜率更小，结合红外热成像测试证实钝化程度减轻。更多还原

【Abstract】 To address the issues of weak oxidation and anode passivation in the Al anode electrocoagulation system, a dual-anode electrochemical system with parallel Al anode and SnO₂-Sb anode is constructed. The Ti/SnO₂-Sb anode is prepared via hydrothermal method combined with hydrofluoric acid（HF） etching and process parameters are optimized. Scanning electron microscopy, X-ray diffractometer and electrochemical workstation are used to evaluate the morphology and performance of the electrode material, and the treatment effect of the dual-anode electrocoagulation on indigo dyeing wastewater is explored. The results show that when the hydrothermal time is 9 h and HF etching time is 2 min, the Ti/SnO₂-Sb electrode has an oxygen evolution overpotential of 1.605 V, with a uniform spherical SnO₂-Sb solid solution coating on the surface and uniform distribution of Sn and Sb elements. When the Ti/SnO₂-Sb anode is placed between the Al anode and graphite cathode, the COD and TOC removal rates of wastewater increase by 13.5% and 9.5% respectively compared with the single Al anode system, and the specific energy consumption decreases by 28.4%. In the dual-anode system, the Al electrode has a lower corrosion potential and a smaller Tafel slope. Combined with infrared thermal imaging tests, it is confirmed that the degree of passivation is alleviated.更多还原