Partic. vol. 11 no. 6 pp. 732-736 (December 2013)
doi: 10.1016/j.partic.2012.06.018

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

Xue Li^*, Yunyi Liu, Pengfei Yang, Yongchao Shi

lxltm@hotmail.com

Abstract

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 co-doped photocatalysts were essentially uniform spherical particles with the smallest particle size of 22.5 nm. Compared to un-doped TiO₂, N-TiO₂ and P-25, the absorption edge of the W, N co-doped TiO₂ shifted to longer wavelength and its photocatalytic activity for degradation of methyl orange (MO) under Xe-lamp (350 W) was higher.

Graphical abstract

Keywords

TiO₂; Co-doped; Visible light; Photocatalytic activity