Utilizing discarded SiC heating rod to fabricate SiC/Sb-SnO2 anode for electrochemical oxidation of wastewater

Abstract

A novel green dimensionally stable anode (DSA) material was fabricated by firstly adopting the discarded SiC heating rod as Supporting material (SiC/Sb-SnO2) for the electrochemical oxidation of wastewater. The obtained SiC/Sb-SnO2 was characterized by scanning electron microscope (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and atomic force microscope (AFM) and its electrochemical properties were studied by cyclic voltammetry (CV), linear scanning voltammetry (LSV) and electrochemical impedance spectroscopy (EIS). The electrode stability, deactivation mechanism and electrochemical oxidation performances of SiC/Sb-SnO2 electrode towards dyes (acid red G and methylene blue) were further investigated and compared with those of Ti/Sb-SnO2 electrode. The results showed that the replacement of Ti substrate with the discarded SiC could effectively increase the loading amount of Sb-SnO2 coating, enhance the compactness of the coating, enlarge the real surface area of electrode and improve the electrooxidation capability of the electrode. Moreover, SiC/Sb-SnO2 electrode exhibited the lower impedance and the higher stability than Ti/Sb-SnO2 electrode. Therefore, the prepared SiC/Sb-SnO2 is a promising anode material that has the merits in the combination of saving electric energy and ensuring the long-term treating efficiency for the practical applications.