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Enhanced Optical and Antibacterial Activity of Hydrothermally Synthesized Cobalt-Doped Zinc Oxide Cylindrical Microcrystals

Khalid A 1 , Ahmad P 2 , Alharthi AI 3 , Muhammad S 1 , Khandaker MU 4 , Faruque MRI 5 Show all authors , Khan A 6 , Din IU 3 , Alotaibi MA 3 , Alzimami K 7 , Alfuraih AA 7 , Bradley DA 4

Affiliations 

  • 1 Department of Physics, Hazara University Mansehra, Khyber Pakhtunkhwa 21300, Pakistan
  • 2 Department of Physics, University of Azad Jammu and Kashmir, Muzaffarabad 13100, Pakistan
  • 3 Department of Chemistry, College of Science and Humanities, Prince Sattam Bin Abdulaziz University, P.O. Box 173, Al-Kharj 11942, Saudi Arabia
  • 4 Center for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, Bandar Sunway 47500, Selangor, Malaysia
  • 5 Space Science Centre, Universiti Kebangsaan Malaysia (UKM), Bangi 43600, Selangor, Malaysia
  • 6 Department of Biotechnology, University of Azad Jammu and Kashmir, Muzaffarabad 13100, Pakistan
  • 7 Department of Radiological Sciences, College of Applied Medical Sciences, King Saud University, P.O. Box 10219, Riyadh 11433, Saudi Arabia
Materials (Basel), 2021 Jun 11;14(12).
PMID: 34207950 DOI: 10.3390/ma14123223

Abstract

Cobalt (Co) doped zinc oxide (ZnO) microcrystals (MCs) are prepared by using the hydrothermal method from the precursor's mixture of zinc chloride (ZnCl2), cobalt-II chloride hexahydrate (CoCl2·6H2O), and potassium hydroxide (KOH). The smooth round cylindrical morphologies of the synthesized microcrystals of Co-doped ZnO show an increase in absorption with the cobalt doping. The antibacterial activity of the as-obtained Co-doped ZnO-MCs was tested against the bacterial strains of gram-negative (Escherichia coli, Klebsiella pneumonia) and gram-positive bacteria (Staphylococcus aureus, Streptococcus pyogenes) via the agar well diffusion method. The zones of inhibition (ZOI) for Co-doped ZnO-MCs against E. coli and K. pneumoniae were found to be 17 and 19 mm, and 15 and 16 mm against S. Aureus and S. pyogenes, respectively. The prepared Co-doped ZnO-MCs were thus established as a probable antibacterial agent against gram-negative bacterial strains.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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