title: Study of photocatalytic activity of ZnS quantum dots as efficient nanoparticles for removal of methyl violet: effect of ferric ion doping.
abstract: Zinc sulfide quantum dots (QDs), as pure and doped with Fe(3+), were prepared for photodecolorization of methyl violet (MV), as a model dye, under UV light irradiation. The syntheses of QDs were carried out using a simple chemical co-precipitation method. The prepared samples were characterized by various techniques including X-ray diffraction, transmission electron microscopy, UV-Vis spectrophotometry and flame atomic absorption spectroscopy. The influences of operational parameters on the decolorization of MV such as dopant content, pH, dosage of nanophotocatalyst, UV irradiation time and initial dye concentration were studied. The results showed that the QDs presented high efficiency for MV decolorization, and doping of ZnS QDs with Fe(3+) enhanced the efficiency and rate of dye removal. Finally, the reproducibility and kinetic model of the dye degradation were discussed.
authors: Department of Chemistry, Razi University, Kermanshah, Iran. Electronic address: mshamsipur@yahoo.com.
authors: Mojtaba
authors: M
authors: Shamsipur
authors: Chemistry Department, Yasouj University, Yasouj 75918-74831, Iran.
authors: Hamid Reza
authors: HR
authors: Rajabi
mesh_terms: D002384:Catalysis / Q000528:radiation effects; D003116:Color; D005840:Gentian Violet / Q000737:chemistry / Q000302:isolation & purification*; D006863:Hydrogen-Ion Concentration; D007501:Iron / Q000737:chemistry*; D007700:Kinetics; D008027:Light; D053758:Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D045663:Quantum Dots / Q000737:chemistry* / Q000648:ultrastructure; D059027:Recycling; D013056:Spectrophotometry, Ultraviolet; D013440:Sulfides / Q000737:chemistry*; D014961:X-Ray Diffraction; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D013440:Sulfides; D017967:Zinc Compounds; D007501:Iron; D005840:Gentian Violet; C031238:zinc sulfide
keywords: Characterization; Chemical co-precipitation synthesis; Methyl violet; Nanophotocatalysts; Pure and doped quantum dots