TiO2 and CeO2 with SS316 Electrode for Degradation of Rh B in Photoelectric-Fenton System

In this research, photoelectric-Fenton reaction (advanced oxidation program) and photocatalysis were combined for treating Rh B wastewater. A certain percentage of CeO2 added into TiO2 after calcination can improve the effect of degradation. The composite (TiO2-CeO2) was used to modify the stainless-steel material (SS316). The results showed that the porosity of the plate after optimal parameterization was 18%, indicating that the electrode can effectively increase the contact area of the composite TiO2-CeO2, increasing its response current 2.11 times in linear sweep voltammetry. The conductivity of the modified electrode was 1.88 times greater than that of SS316 in a four-point probe experiment. In the Tafel corrosion experiment, the plate after optimal parameterization had a corrosion potential ranging from -299 mV to -160 mV and a corrosion current ranging from 524 nA to 107 nA, which greatly improved the anticorrosion effect of the original SS316 substrate. In the photoelectric-Fenton experiment, the degradation rate of the composite electrode was 50.83% in 30 min, which was 1.26 times higher that of the SS316 substrate. The results showed that the 3 TiO2: 1 CeO2 :/SS316 electrode has good stability and a good degradation effect in the Photoelectric Fenton process.