Photocatalytic properties of N-doped TiO2 fiber

Abstract

TiO₂ photocatalytic fibers have been prepared from polytitanoxane in sol-gel process. N-doped TiO₂ fibers were obtained by heat-treatment of the polytitanoxane gel fibers or TiO₂ fibers in NH3 atmosphere, and showed a visible-light responsiveness. Under both visible and ultra-violet light irradiations, the photocatalytic activity of N-doped TiO₂ fiber NH₃-treated at 500°C was superior to that of fibers NH₃-treated at 600°C and 700°C.