Abstract:
Undoped and Fe-Mn codoped CdS nanoparticles have been synthesized via precipitation
method. The nanostructures of the prepared undoped and Fe-Mn codoped CdS nanoparticles
have been confirmed using UV/Vis absorption and X-ray diffraction analysis. The UV/Visible
spectroscopy studies showed that the absorption peak for Fe-Mn codopedCdS has undergone
a red shift toward visible wavelengths compared with the CdS nanoparticles. Photocatalytic
efficiency of Fe-Mn codopedCdS nanoparticle was investigated for the degradation of MB
under visible light irradiation. The results showed that Fe-Mn codopedCdS nanoparticles
have exhibited greater photocatalytic activity when compared with the undoped CdS
nanoparticle under visible light irradiation. According to these results, application of Fe-Mn
on the surface of CdS nanoparticles has caused enhanced photocatalytic activity owing to its
greater degradation efficiency. The reduction in absorbance of dye suggests that the dye molecules were mineralized along with color removal. According to these result, oxidation of
the MB consumes photo-generated holes and/or • OH radicals efficiently, blocking the
electron-hole recombination and thus, increasing the total efficiency. Influences of some
operational parameters such as: amount of photocatalyst, pH of solution, and MB initial
concentration on the photodegradation reaction rate were investigated. The optimum values
of pH and catalyst dose were found to be 4 and 150 mg/L, respectively for MB intial
concentration of10 mg/L.
CdS,doping,dye,nanoparticle,Photocatalyst,VisibleLight,andXRD
