Electrode Preparation And Three-dimensional Photoelectric Catalysis Performance Research

Three-dimensional photovoltaic system due to efficient photovoltaic synergy,Photocatalytic activity of Ti O2 into full play, Effectively improve the efficiency of the degradation of organic pollutants. This paper selects the vermiculite as carrier particles,Ti O2 / vermiculite prepared by sol- gel method,Using Ti O2 / vermiculite and graphite particle electrode,Respectively the prepared by sol-gel method(Titanium photoelectrode) and the mesh electrode prepared by micro arc oxidation(Titanium mesh membrane electrode) to be the main electrode,Graphite flakes as cathode,Methylene blue solution as the goal degradation,the supporting electrolyte was Anhydrous sodium sulphate solution,fixed light source was 20 w UV lamp,in the role of a constant external voltage,research on three-dimensional photoelectric catalysis system degradation rate of methylene blue solution.The experiment studied the influence of three-dimensional electrode photoelectric catalysis performance factors, Ti O2 / vermiculite with graphite particle electrode and Titanium mesh photoelectrode composed of three dimensional electrode photoelectric system show that: when calcination temperature of the titania photoelectrode was 550 ℃, calcination temperature of Ti O2 / vermiculite particles was 500 ℃, Graphite 0.8g, Ti O2 / vermiculite 0.2g, External voltage 2V, Electrode distance 3cm,solution concentration of Anhydrous sodium was 0.02 mol / L, Methylene blue solution concentration 5mg / L, p H=10, Three-dimensional photoelectric catalysis experiment of methylene blue decolorization rate was best 51.9%. Load Ag ionand Cu ion titania photoelectrode experiments, the best loading amount of Ag ion was 1.0%, Methylene blue decolorization rate was 59.6%, the best loading amount of Cu ion was 0.75%, Methylene blue decolorization rate was 53.2%.Ti O2 / vermiculite with graphite particle electrode and Titanium mesh membrane electrode composed of three dimensional electrode photoelectric system show that:(1)6g / L sodium phosphate as the electrolyte,Micro-arc oxidation reaction time was 5min, Photoelectrocatalysis of methylene blue decolorization rate was 40.15%. Determine the best modified method load Cu2 + was continue micro-arc oxidation, 60 min photoelectric catalytic reaction of methylene blue degradation rate reached 39.55%. When Cu2 + concentration was 0.01 mol / L,continue micro-arc oxidation time was 7min, The best decolorization rate of Methylene blue was 44.01%.While determining,When Ag + concentration was 0.01 mol / L,continue micro-arc oxidation time was 5min,the best decolorization rate of Methylene blue was 54.33%.(3)When formaldehyde as target,studied the decolorization rate of formaldehyde that used the micro-arc titanium mesh electrode, continue micro-arc oxidation load Cu2 + and Ag + electrode, 120 min photoelectrocatalysis were 15.7%, 21.9% and 32.1%. Load Cu2 + and Ag + titanium mesh electrodes were higher than the titanium mesh electrode only micro-arc oxidation, Description Cu ion and Ag ion modifications were positive modification.