Effect of WO۳ Nanoparticles on Congo Red and Rhodamine B Photo Degradation

Tungsten trioxide nanoparticles with two different sizes (average particle sizes about ۵۰ and ۸۰ nm) were prepared by the spray pyrolysis method. Photo degradation of Congo Red (azo dye) showed that photo catalytic property of the as-prepared WO۳ nanoparticles with average size about ۸۰ nm is higher than the sample with average size about ۵۰ nm. Photo degradation of Rhodamine B (cationic triarylmethane dye) showed that photo catalytic property of the as-prepared WO۳ nanoparticles with average size about ۵۰ nm is higher than the sample with average size about ۸۰ nm. The samples were characterized with X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM), EDX analysis and UV-visible spectrum. Different interactions between dyes and the photo catalyst surface, probably causes the inverse behavior of WO۳ nanoparticles with two different sizes in Congo Red and Rhodamine B photo degradation reactions.

کلیدواژه ها:

WO۳ nanoparticles ، Photo degradation ، Rhodamine B ، Congo red