Abstract: The NaBi(MoO₄)₂ electrode was prepared by the pressed sheet method,  and the material was modified by doping with Y³⁺. The morphology,  structure and electrochemical properties of the electrodes were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), ultraviolet-visible-diffuse reflectance spectrum (UV-Vis-DRS) and electron spin resonance (ESR),  and the performance and reaction mechanism of the photocatalytic degradation of sildenafil were also investigated. The experimental results show that the NaBi(MoO₄)₂-based electrode  has a lamellar structure and high purity,  with the size ranging from about 37.5 nm to 24.6 nm. In the optimal electrolyte Na₂SO₄ solution with a concentration of 0.5 mol/L  and the optimal bias voltage of 1.5 V, sildenafil  can be completely removed after 70 min.

Key words: sodium bismuth molybdate,  , sildenafil,  , photocatalysis,  , pressed sheet electrode