Enhancement of the visible light photocatalytic activity of vanadium and nitrogen co-doped TiO₂ thin film

Abstract

Vanadium and nitrogen co-doped TiO2(TiO2:(V, N)) thin films were fabricated by sol–gel method. Crystal structure, surface morphology, chemical composition and absorption edge of the thin films were characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS) and UV-Vis spectroscopy techniques, respectively. Photocatalytic activity of all thin films were evaluated by measuring decomposition rate of methylene blue solution under visible light irradiation. The water contact angle analyzer was used to measure water contact angle on the film. The results indicate that absorption edge of TiO2:(V, N) thin films shifts to visible region. All co-doped TiO2 samples show higher visible light photocatalytic activity than undoped TiO2 and single-element-doped TiO2 counterparts. The best TiO2:(V, N) thin film can decompose about 90% MB solution and gets super wet state after 150[Formula: see text]min under compact light irradiation.

Investigating Visible-Photocatalytic Activity of MoS2/TiO2 Heterostructure Thin Films at Various MoS2 Deposition Times

“…The details of the procedure for making the TiO 2 samples have been described in our previous work [21]. Tetrabutyl orthotitanate (Ti(OBu) 4 ) (99.99%) was dissolved in a mixture solution of diethanolamine (HN(C 2 H 4 OH) 2 ) (99.99%) and ethanol (C 2 H 5 OH) (99.99%).…”

Influence of Ho Substitution on Structural, Morphological, and Optical Properties of Anatase Ti1-xHoxO2 (x= 0.0, 0.01, 0.02, 0.03) Thin Films

“…In regard to doping studies carried out so far, different factors exist that can affect the final sample, such as production methods and parameters, types of precursor materials and ratios, and solvents. Therefore, each doping processing method should be evaluated within itself in terms of its conditions [14,15]. Namely, even if the same element is doped, different results can be obtained.…”