Fabrication Of Antimony-doped Tin Oxide Nanoparticles Electrode By Screen Printing Method And Its Application In Wastewater Treatment

As one of the most effective electrode system for wastewater treatment by electro-catalytic oxidation,the fabrication and modification of SnO₂-Sb electrode has aroused general interest.In present study,a novel antimony-doped tin oxide nanoparticles electrode?Ti/ATONPs?was fabricated by screen printing method,which was applied in C.I.AR 73 wastewater treatment area for the first time.We first optimized the process of the preparation of Ti/ATONPs electrode using screen printing method.In contrast with traditional Ti/SnO₂-Sb electrode,the results of Scanning electron microscopy?SEM?,X-ray diffraction?XRD?and BrunauerEmmett-Teller?BET?test indicated that the average catalyst particle size of Ti/ATONPs was 50 nm and owned a more smooth and compact electrode surface,greatly increased the electrode surface area,coupled with mesoporous structure formed between the nanoparticles provided more reactive sites and molecular adsorption sites for the electro-catalytic oxidation reaction.Electrochemical measurements including linear sweep voltammetry?LSV?,cyclic voltammetry?CV?,electrochemical impedance spectroscopy?EIS?and chronocoulometry?CC?were employed to investigate the electrochemical activity,compared with Ti/SnO₂-Sb,Ti/ATONPs owned a higher oxygen evolution potential?2.18 V vs 2.08 V?,a lower charge transfer resistance?0.47 ? vs 13.24 ??,a larger electrochemically effective surface area?38.97 cm2·cm-2 vs 3.03 cm2·cm-2?and the voltammetric charge analysis indicated that Ti/ATONPs could create more reaction active sites to enhance the electrocatalytic efficiency.To further explore the electrocatalytic oxidation performance,AR 73 was used as target pollutant to monitor the concentration changes,the removal of AR 73 degradation and energy consumption of Ti/ATONPs electrode was 84%,13.67 Wh·L-1 while that of Ti/SnO₂-Sb was 67%,22.65 Wh·L-1 respectively.The reduction of energy consumption and improvement of color removal implied a economic cost advantage in the wastewater treatment field with the method of screen printing for preparing an electrode.In addition,the paper also studied the applicability of Ti/ATONPs under different degradation operating conditions,designed to provide a theoretical basis for its application in the wastewater treatment area.