Synthesis, Spectral Characterization and Photocatalytic Application of S-doped g-C3N4 Nanocomposites with zno and Cu-doped zno Nanostructure
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Date
2018
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UMT, Lhr
Abstract
Investigation of the doping influence on structures and photocatalytic properties of ZnO nanostructures at optimum concentration is presented. Moreover enhanced photocatalytic performance making composite with sulfur doped g-C₃N₄ is also presented. Copper (Cu) is used as dopant on ZnO nanostructures. Undoped and doped (1, 3, 4 and 5 %) doped nanoparticles were prepared by wet chemical method and annealing was done at 450 ᵒC for 3 hours. Sulfur doped graphitic carbon nitride nanosample was prepared by using thiourea. Nanocomposites of sulfur doped graphitic carbon nitride with pure zinc oxide and copper doped zinc oxide were prepared. Two types of composites were prepared. (a) Composites of pure ZnO with graphitic carbon nitride. (b) Composite of copper doped ZnO with graphitic carbon nitride. Different characterization techniques were used to analyze the structural properties like (SEM) scanning electron microscopy, (XRD) X-ray diffraction and FTIR spectroscopy. Photocatalytic activities of all the samples were checked by UV- Visible spectrophotometer. Methylene blue (MB) was employed as an organic pollutant for the photocatalytic activities and mercury lamp was used for irradiation of visible light. All the samples showed a good photodegradation of methylene blue. Cu-4 % doped ZnO was very good sample among all dopant concentrations. ZnO composites with g-C₃N₄ and Cu 4 % doped ZnO nanocomposites with g-C₃N₄ showed considerable degradation.