Optimization of Ti/MoS2/N-TiO2 electrode preparation to use in visible light photocatalytic ozonation process

Photocatalytic ozonation is one of the most promising methods for elimination of pharmaceuticals from water due to its several advantages [1]. However, the effective photocatalysts such as TiO2 and ZnO are commonly excited with ultraviolet light and used in the suspension form, which is difficult to separate them from the treated water [2]. In this work N-TiO2 and MoS2 particles was synthesized. The particles were simultaneously immobilized on the surface of titanium plates by electrophoretic deposition method [3]. Effect of MoS2:N-TiO2 mass ratio was investigated to prepare effective immobilized visible light photocatalyst. The prepared Ti/MoS2/N-TiO2 electrode was characterized by SEM, XRD and DRS analysis.Ability of the prepared Ti/MoS2/N-TiO2 electrode in the degradation of naproxen by visible light photocatalytic ozonation process was investigated. Effect of visible light power, ozone flow rate and pH on the naproxen degradation efficiency was investigated. According to the obtained result, the naproxen degradation efficiency was increased with visible light power and ozone flow rate. This study shows the synergistic effect between photocatalysis and ozonation process. The prepared Ti/MoS2/N-TiO2 electrode has good mechanical and chemical stability during the photocatalytic ozonation degradation processes through recycling after several times.