Abstract:  A Ti/CoWO₄ photoanode with excellent semiconductor properties was prepared on a titanium substrate by using a one-step hydrothermal method. The number of CoWO₄ nanospheres attached to the substrate surface could be easily adjusted by changing the hydrothermal time,  where Ti/CoWO₄-6 h had a larger active area,  higher charge transfer ability and higher  intermediate active species (free radicals) generation efficiency. The materials were characterized by ultraviolet-visible spectroscopy (UV-Vis) and scanning electron microscopy (SEM) to investigate the photoelectrocatalytic (PEC) degradation activity of Ti/CoWO₄ photoanodes on reactive brilliant blue (KN-R). The results show that under PEC conditions, the decolorization rate of KN-R (60 mg/L) by Ti/CoWO₄-6 h  can reach 84.97%,  and the degradation rate can still reach 74.91% after 5 cycles.

Key words: titanium sheet,  , cobalt tungstate,  , photoelectric catalysis,  , reactive brilliant blue