Ag/Tio2/AOF as an Easily Reused and Highly Active Catalyst for Dye Photo-Degradation

Abstract

A novel TiO2 loaded with Ag photocatalyst covering on a modified fiber surface was prepared by coordination-hydrolysis combined with a photo-reduction process. Samples were characterized by X-ray powder diffraction (XRD), field emission scanning electron microscope (SEM), X-ray photoelectron spectroscope (XPS) and ultraviolet visible diffuse reflectance spectra (UV-vis DRS). Compared with powder TiO2, the TiO2/amidoxime fiber (TiO2/AOF) and Ag/TiO2/amidoxime fiber (Ag/TiO2/AOF) exhibited a significant absorption edge of red-shift from ultraviolet to visible light region. The samples’ visible-light photodegradation activities were investigated and the results showed that the Ag/TiO2/AOFs exhibit excellent photocatalytic activities-about 99% decomposition rate of Rhodamine B with 100 minutes of visible light irradiation. The catalyst exhibits excellent catalytic activity and is easily recovered and reused.