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Research of Ti/PbO2 Electrodes Degradate Organic Pollutants

Author: GuoXinYan
Tutor: WeiJie
School: Suzhou Institute of Technology
Course: Applied Chemistry
Keywords: Electrocatalytic oxidation The titanium base PbO2 electrode 2 - chlorophenol Degradation
CLC: X703
Type: Master's thesis
Year: 2011
Downloads: 48
Quote: 0
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Abstract


First examine the impact of the middle layer of lead dioxide electrodes. Combined with pyrolysis and electrodeposition method were prepared Ti / β-PbO 2 , Ti / SnO 2 Sb 2 O 3 / β-PbO 2 and the Ti / α-PbO 2 / β-PbO 2 three electrode, and SEM, XRD and anodic polarization curves were prepared electrode characterization and target 2 - chlorophenol pollutants investigated three electrode electro-catalytic oxidation resistance and electrode life. The research results show that the intermediate layer has a significant impact on the structure and morphology of the surface of the active layer and the catalytic activity. The which the Ti / α-PbO 2 / β-PbO 2 electrode oxygen evolution potential maximum of 2 - chlorophenol removal rates of up to 99.3%, with a longer The electrode life and lower tank voltage. Three electrodes of 2 - chlorophenol degradation reactions follow first-order reaction kinetics. Followed by a titanium plate and titanium mesh matrix, prepared two series of catalytic electrode. The effects of different matrix, the middle layer and the different activity of the outer layer of the electrode electro-catalytic degradation of 2 - chlorophenol performance. The research results show that the overall performance of the electrode titanium plate matrix series is better than the corresponding electrode of titanium mesh matrix. Β-PbO 2 for the overall performance of the activity of the outer layer of lead dioxide electrodes is superior to RuO 2 for the activity of the outer electrode. Six kinds of electrode 2 - chlorophenol degradation reactions follow first-order reaction kinetics. Comprehensive consider the Ti / α-PbO 2 / β-PbO 2 electrode best performance. Ti / α-PbO 2 / β-PbO 2 electrode degradation of 2 - chlorophenol the optimum conditions were investigated by orthogonal experiments. The results showed that the electrode catalytic degradation of 2 - chlorophenol optimum conditions are: 2 - chlorophenol initial concentration of 50mg / L, the supporting electrolyte Na 2 SO 4 the concentration of 0.2mol / L, the pole spacing of 1.5cm, a temperature of 35 ° C and the anode current density was 20mA/cm 2 . Under optimum conditions, further investigated the effect of electrode degradation of 2,4 - dichloro-phenol and bisphenol A, and electro-catalytic degradation of 2 - chlorophenol mechanism to conduct a preliminary study. Wherein the Ti / alpha-PbO 2 / β-PbO 2 pair of electrodes different organisms have high electrocatalytic activity.

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CLC: > Environmental science, safety science > Processing and comprehensive utilization of waste > General issues > Wastewater treatment and utilization
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