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Co-Doped ZnS Quantum Dots: Structural, Optical, Photoluminescence, Magnetic, and Photocatalytic Properties

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Abstract

Pristine and Co-doped ZnS quantum dots (QDs) were fabricated via a hydrothermal technique. Morphology studies showed that the fabricated QDs were nearly spheroidal with narrow size distribution. X-ray diffraction and Raman spectroscopy analyses demonstrated that the Co ions effectively penetrated the host matrix without changing its cubic phase. A minimal blue shift was found in the pristine ZnS QDs after doping with Co. The pristine and Co-doped samples exhibited similar blue emission, while increased (two times) photoluminescence intensity was observed for the Co-doped sample. X-ray photoelectron spectroscopy analysis showed trivalent Co ions in the ZnS lattice. The diamagnetic ZnS QDs were turned into ferromagnetic through Co-doping. The Co-doped ZnS QDs portrayed higher photocatalytic degradation (PCD) of Rhodamine B dye under artificial solar simulator irradiation than pristine ZnS. Hence, the Co-doped ZnS QDs may find applications in luminescent, spintronic and photocatalytic devices.

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Funding

This research was supported by 2018 Research Supporting Program through the Hwasung Scholarship & Culture Foundation.

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Authors and Affiliations

  1. Department of Electronic Engineering, Yeungnam University, Gyeongsan, 38541, South Korea

    B. Poornaprakash, U. Chalapathi & Si-Hyun Park

  2. Department of Physics, Siddartha Educational Academy Group of Institutions, Tirupati, 517502, India

    P. T. Poojitha

  3. School of Mechanical Engineering, Yeungnam University, Gyeongsan, 38541, South Korea

    S. V. Prabhakar Vattikuti

Authors
  1. B. Poornaprakash
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  2. U. Chalapathi
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  3. P. T. Poojitha
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  4. S. V. Prabhakar Vattikuti
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  5. Si-Hyun Park
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Correspondence to Si-Hyun Park.

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Poornaprakash, B., Chalapathi, U., Poojitha, P.T. et al. Co-Doped ZnS Quantum Dots: Structural, Optical, Photoluminescence, Magnetic, and Photocatalytic Properties. J Supercond Nov Magn 33, 539–544 (2020). https://doi.org/10.1007/s10948-019-05223-4

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  • DOI: https://doi.org/10.1007/s10948-019-05223-4

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