Visible light-driven photocatalysis of W,N co-doped TiO2

摘要

W,N co-doped TiO2 nanoparticles were synthesized by a sol-gel method.The prepared samples were characterized by X-ray diffraction（XRD）,field emission scanning electron microscopy（FE-SEM）,transmission electron microscopy（TEM）,Fourier transform infrared spectroscopy（FT-IR）,X-ray photoelectron spectroscopy（XPS） and diffuse reflectance spectrophotometry（DRS）.The results showed that the codoped photocatalysts were essentially uniform spherical particles with the smallest particle size of22.5 nm.Compared to un-doped TiO2,N-TiO2 and P-25,the absorption edge of the W,N co-doped TiO2shifted to longer wavelength and its photocatalytic activity for degradation of methyl orange（MO） under Xe-lamp（350 W） was higher.