Comparison of the Properties of Low-Dimensional Nano-Ti/SnO2-Sb-Fe Electrodes Prepared by Different Methods

Abstract

Ti/SnO2-Sb-Fe electrodes have been prepared by a novel precipitation printing method, the traditional sol-gel method, and the direct current deposition method. The microstructure of the electrodes was systematically characterized through X-ray diffraction (XRD) observation and high-resolution transmission electron microscopy (HRTEM) verification. In addition, the morphology was characterized by scanning electron microscopy (SEM), while the electrochemical properties and the stability were further investigated by cyclic voltammetry (CV), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS), and accelerated life testing. The results indicate that the Ti/SnO2-Sb-Fe electrode prepared by precipitation printing has the smallest nanoparticle structure (< 10 nm), a higher electrochemical porosity (49.6%), and a higher oxygen evolution potential (2.20 V). As a comparison, the Ti/SnO2-Sb-Fe electrode prepared by the sol-gel method has the longest service life. To further evaluate the electrocatalytic activity of the Ti/SnO2-Sb-Fe electrodes, Acid Red 73 was employed as simulated sewage for electrochemical degradation. After 180 min, the removal efficiency of AR 73 reached 86.8%, 63.4%, and 74%, respectively, for Ti/SnO2-Sb-Fe electrodes prepared by precipitation printing method, traditional sol-gel method, and direct current deposition method. Furthermore, the degradation of AR 73 followed pseudo-first-order kinetics.