Study On Pr Modified Anode Preparation And Its Electro-catalytic Ability For Simulated Wastewater Oxidation

With the rapid development of industry, the increasing emission of refractory organic pollutants has been challenged the conventional biological treatment due to the refractory organic pollutants have high resistance to biological degradation. Therefore, electrochemical process for refractory organic wastewater has gained extensive attention in the past two decades. Development of high-efficiency catalytic electrodes is always a hotspot in this field. In the research, the simulated wastewater degradation was studied with the Pr modified Ti/SnO₂-Sb/PbO₂ anode and TiO₂-NTs/SnO₂-Sb anode respectively. Anode preparation method and other parameters were changed to study its effect on wastewater oxidation.A Pr-doped SnO₂-Sb electrode was prepared by a simple method of cyclic voltammetry?CV?. The methyl orange?MO? was selected as a simulated wastewater. The ordered microstructured TiO₂-NTs substrate was synthesized through an electrochemical method to obtain a large spec ific surface area and high utility rate of space. The phase structure, electrode surface morphology and electrochemical properties of electrodes were characterized by XRD, SEM and electrochemical technology. The results showed that praseodymium oxide was s uccessfully doped into the SnO₂-Sb film by CV method. Due to the doped Pr, the oxygen evolution potential increased from 2.25 V to 2.40 V. The degradation of MO was investigated by UV–vis. The Ct/C0??? was studied as a function to obtain the optimal parameters, such as the amount of Pr, current density and initial dye concentration. In addition, the degradation process followed pseudo- first-order reaction kinetics and the rate constant was 0.0993min-1. The results indicated that the introduction of Pr enhanced the formation of oxygen vacancies and surface hydroxyl groups, therefore, a better activity and stability was obtained.