Photocatalytic properties and optical absorption of ZnFe₂O₄ doped TiO₂ films

Abstract

TiO₂ films doped with ZnFe₂O₄ were prepared by a sol–gel method. The crystalline structure, photocatalytic efficiency and optical absorption band were investigated using X-ray diffraction and Ultraviolet-Visible spectrometer. The doping of ZnFe₂O₄ improves the photocatalytic efficiency and broadens the optical absorption band of TiO₂ films. The photocatalytic efficiency of TiO₂ films increases from 12 to 32% with the presence of ZnFe₂O₄. The exciting wavelength of TiO₂ films shifts about 20 nm to the visible light regions when the molar ratio of ZnFe₂O₄ is 2%.

Keywords:

• TIO2 FILMS
• ZNFE2O4
• PHOTOCATALYTIC PROPERTY
• OPTICAL ABSORPTION
• SOL-GEL