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Abstract
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HoxCd1-xS (0 B x B 0.12) nanoparticles with
different Holmium contents were successfully synthesized
via hydrothermal method. The prepared samples were
characterized by X-ray diffraction, scanning electron
microscopy, Energy-dispersive X-ray spectroscopy, X-ray
photoelectron spectroscopy and UV–Vis diffuse reflectance
spectroscopy techniques. Photocatalytic efficiency of pure
and HoxCd1-xS samples was evaluated by monitoring the
decolorization of RRed 43 in aqueous solution under visible
light irradiation. 8 % Ho-doped CdS nanoparticles
indicated the highest decolorization among the different
amounts of dopant agent used. The effect of operational
parameters including doping level, catalyst dosage, initial
dye concentration and radical scavengers on the photocatalytic
activity were evaluated. The Langmuir–Hinshelwood
(L–H) model was evaluated for the photocatalytic process.
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