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Fabrication of ZnO, ZnS, Ag-ZnS, and Au-ZnS microspheres for photocatalytic activities, CO oxidation and 2-hydroxyterephthalic acid synthesis
Journal of Alloys and Compounds (2016)
  • Mohammad Mansoob Khan, Dr
  • Dr Youngku Sohn
Abstract
This paper reports the synthesis of ZnS microspheres with cubic and hexagonal crystal phases using a solvothermal method. These materials were characterized by a range of techniques. The effects of Au and Ag-doping on ZnS were also examined. Hexagonal phase ZnO microspheres could be obtained by a CO oxidation process over the ZnS microspheres. The onset of CO oxidation occurred above 350 °C, which was increased by Au and Ag doping. The synthesized materials were used for the photocatalytic degradation of mixed dyes {methylene blue (MB) + methyl orange (MO) + rhodamine B (RhB)}. The observed photocatalytic degradation rate over the photocatalysts was in the order, RhB < MB << MO. The photocatalytic degradation activity of the synthesized materials was observed in the order, Au-ZnS ≈ Ag-ZnS << ZnS < ZnO. ZnO was ∼6 times more efficient in the photocatalytic synthesis of 2-hydroxyterephthalic acid than the ZnS and metal-doped ZnS. These results further support the importance and wide applications of the synthesized ZnS, Ag-ZnS, Au-ZnS and ZnO microspheres.
Keywords
  • ZnO,
  • ZnS,
  • Ag-ZnS,
  • Au-ZnS,
  • microspheres,
  • photocatalytic activities,
  • CO oxidation,
  • 2-hydroxyterephthalic acid synthesis *
Publication Date
Spring March 15, 2016
Citation Information
Mohammad Mansoob Khan and Youngku Sohn. "Fabrication of ZnO, ZnS, Ag-ZnS, and Au-ZnS microspheres for photocatalytic activities, CO oxidation and 2-hydroxyterephthalic acid synthesis" Journal of Alloys and Compounds Vol. 675 (2016) p. 46 - 56
Available at: http://works.bepress.com/mmansoob_khan/70/