Preparation, Characterization and Photocatalytic Activity of F, Fe-Codoped Nano-TiO₂

Abstract

Pure and F, Fe-codoped TiO 2 were prepared by sol-hydrothermal process, in which titanium (IV) n-butoxide, Fe (NO 3 ) 2 ·6H 2 O and NH 4 F were used as precursors. And the samples were characterized by X-ray diffraction (XRD), UV-vis diffuse reflectance spectroscopy (DRS), scanning electron microscopy (SEM), and N 2 adsorption-desorption method. The results showed that the F, Fe-codoped samples were principally single-phase anatase structures, and the particles possessed higher BET area than that of pure TiO 2 . The photocatalytic activity and reusability of the catalysts under UV light (365nm) was investigated with neutral red as the model compound. The results showed that F (2.0%), Fe (4.0%) codoped TiO 2 had the highest photocatalytic activity among all as-prepared samples. The kinetic study showed that this photocatalytic process coincided with the Langmuir-Hinshelwood (L-H) pseudo first order reaction model.