电氧化PFOA/PFOS的超疏水性Ti/SnO2-Sb/PbO2修饰电极制备及机理研究

PFOA/PFOS是典型难降解全氟化合物，开展环境介质中PFOA/PFOS去除技术是目前环境领域的研究热点。电化学氧化技术可有效去除水相中全氟化合物，开发高效稳定的电极材料是研究核心。本研究拟在前期研究工作基础上，继续探索可氧化PFOA/PFOS的电极材料，采用电沉积法制备超疏水性Ti/SnO2-Sb/PbO2电极，提高析氧电位，增强氧化能力。通过不同的修饰方式，调控PbO2电极表面结构和疏水性；关联电极微观结构、疏水性与电氧化能力关系；利用超疏水性PbO2电极电氧化特性使得PFOA/PFOS得以降解；考察影响电氧化主要影响因素；研究电极微界面的电化学和微观结构变化，鉴定电氧化中间产物，阐明超疏水性阳极材料电氧化PFOA/PFOS机理。本项目探索新型阳极材料的超疏水性修饰方法，进行PFOA/PFOS的有效降解，为该类难降解废水的处理提供新的技术路径及理论支撑。

PFOA/PFOS as typical refractory perfluorinated compounds, their treatment technologies have received a lot of scientific attention recently. Compared with other technologies,electrochemical oxidation technology can effectively remove these compounds in water, and the electrodes play an important role in the oxidation processes. Based on our previous research, this study continue to explore the anodic materials which can electrochemically oxidize PFOA/PFOS.In this project a super-hydrophobic anodic material Ti/SnO2-Sb/PbO2 will be fabricated with electro-deposition method to increase the oxygen evolution potential and oxidation ability. The morphology and the hydrophobicity of the electrode are improved by the different modified methods.Degradation of PFOA/PFOS on the super-hydrophobic Ti/SnO2-Sb/PbO2 will be investigated, and the main operation parameters to be evaluated.Also,the changes of micro interface and microstructure,the production of intermediates, and the electrochemical oxidation mechanism on the super-hydrophobic Ti/SnO2-Sb/PbO2 will be studied. The super-hydrophobic anodic material developed in this project will contribute to future research for the degradation of refractory compounds.