The Preparation Of Photoelectrode And Photoelectrocatalytic Degradation Of Cu-EDTA

Heavy metal waste water is a major cause of environmental pollution.Heavy metal complexes can enhance the migration of heavy metals and cause a wider range of heavy metals pollution.Conventional water treatment methods for treating heavy metal complex are difficult.To solve this problem,Firstly,higher-performance photocatalytic materials are prepared,and use it to remove Cu-EDTA through photoelectrocatalysis.First,the Bi₂MoO₆/g-C₃N₄ composite electrodes were prepared on the conductive glass subtrate through dip coating method.The prepared samples were characterized by SEM,EDX,TEM,XPS and photocurrent for surface texture,composition and photocurrent response.The results show that g-C₃N₄ and Bi₂MoO₆ formed complexe;when the Bi₂MoO₆ and g-C₃N₄ precursor mass ratio was 20:1,the composite electrodes have the highest and stable visible light photocatalytic activity.Under visible light,With Bi₂MoO₆/g-C₃N₄?20:1?composite electrodes photocatalyticoxidating methylene blue,which showed better photocatalytic activity;and have a research about using it to remove Cu-EDTA.Titanium dioxide nanotube array electrode prepared by the anodic oxidation process was modified by graphene oxide?GO?through cyclic voltammetry method.The surface texture of the obtained electrodes were characterized by SEM analysis.Based on the photocurrent analysis,the titanium dioxide nanotube electrode modified by GO exhibited higher photocurrent response in comparison with the unmodified titanium dioxide nanotube electrode.By using the method of photoelectrocatalysis to remove Cu-EDTA complexes,the effect is obviously better than the unmodified titania nanotubes.Research indicates that:using the electrodes modified by GO as anode,when the voltage was 1V,reaction time was90 min,the removal of Cu-EDTA was 93.1%.The conductive glass as substrate,titanium dioxide?TiO₂?thin film electrodes were prepared by sol-gel method.The morphology and composition of electrodes were characterized by SEM and EDX.Based on the photocurrent analysis,at the condition of three thira times and the calcination temperature was 5000 C,the titanium dioxide thin film electrodes exhibited higher photocurrent response.These electrodes remove Cu-EDTA via aphotoelectrocatalytic process.The results show that at 2.0 V,the photoelectric catalytic oxidation was best.In the presence of EDTA or K₄P₂O₇,the photoelectric catalytic oxidation was promoted.Thanks to the supported by the National Natural Science Foundation of China.