Abstract
In this work, a facile method has been employed for the decoration of ultrafine ZnO nanoparticles over the exfoliated MoS2 nanosheets (ZnO-MoS2 composite) for the decolorization of methyl red dye under solar light irradiation. Further, the exfoliation of MoS2 nanosheets from bulk MoS2 powder and synthesis of pure ZnO nanoparticles was also demonstrated. Then, the prepared different photocatalyst materials have been characterized using various analytical techniques. The formation of ZnO and exfoliation of MoS2 in the composite has been evidently confirmed by XRD, FT-IR and Raman spectroscopic analysis. HR-TEM analysis clearly revealed the formation of ultrafine ZnO nanoparticles that are anchored on the exfoliated MoS2 nanosheets. In addition, the size of ZnO nanoparticles in the composite was significantly reduced compared to bare ZnO nanoparticles since the presence of MoS2 nanosheets which hinders the growth of ZnO nanoparticles. Due to the synergistic interaction between ZnO nanoparticles and exfoliated MoS2 nanosheets, the prepared composite exhibits superior photocatalytic activity towards the decolorization of methyl red dye up to 89% after 60 min irradiation time compared to pure ZnO nanoparticles (69%) and exfoliated MoS2 nanosheets (55%).
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