The effects of Annealing Temperatureon the Structural, Morphological and Optical Properties of V2O5 Thin Films Prepared by Sol–gel Method

V2O5 thin films were successfully synthesized by sol- gel method.The influence of annealing temperature onthe structural behaviour, morphology, optical and photocatalytic properties of films were investigated by XRD, SEM AFM and UV-visible spectroscopy. XRD results show structural change from orthorhombic to tetragonal -βV2O5 phase. The c-axis orientation along the (200) plane was enhanced byincreasing the annealing temperature. SEM images indicate significant change in morphology, which is due to different annealing temperature. AFM results show an increase in root mean square roughness with increasing the annealing temperature. Transmittance and reflectance of thin films illustrate a decreasing trend in the transparency and reflectance as well. The photodegredation results clearly indicate that the thin film of V2O5 has significant effect on the photodegradation of Methylene Blue (MB).

کلیدواژه ها:

V2O5 ، SOL-GEL ، thin film ، Photocatalyst ، Methylene blue