Using BiOI as the precursor

the W18O49(2%)/BiOI material was prepared by chemical precipitation method.In order to study the photocatalytic performance of the material.The samples were characterized by X-ray powder diffraction (XRD)

scanning electron microscopy (SEM)

ultraviolet visible diffuse reflectance spectroscopy (UV-Vis DRS) and fluorescence spectrophotometer (PL).The results showed that the introduction of W18O49did not change the crystal structure of BiOI

and the degradation rate of pure BiOI was about 21%

and the degradation rate of the material with W18O49reached about 98%.The degradation rate of the composite material is significantly higher than that of pure material.The band gap width of pure BiOI and pureW18O49meterials are about 1.97eVand 3.06eV. They can form heterojunctions

accelerate the electron transfer rate

effectively reduce the recombination of electron and hole pairs

and improve the photocatalytic activity of the material.