INFLUENCE OF NICKEL DOPING CONCENTRATION ON THE CHARACTERISTICS OF NANOSTRUCTURE CuS PREPARED BY HYDROTHERMAL METHOD FOR ANTIBACTERIAL ACTIVITY

Selma M. H. Al-Jawad, Ali A. Taha, Abdulah Mohammed Redha and Natheer Jamal Imran
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Selma M. H. Al-Jawad: Applied Physics Department, School of Applied Sciences, University of Technology, Baghdad, Iraq
Ali A. Taha: #x2020;Biotechnology Department, School of Applied Sciences, University of Technology, Baghdad, Iraq
Abdulah Mohammed Redha: Applied Physics Department, School of Applied Sciences, University of Technology, Baghdad, Iraq
Natheer Jamal Imran: #x2021;Ministry of Science and Technology, Baghdad, Iraq

Surface Review and Letters (SRL), 2021, vol. 28, issue 01, 1-16

Abstract: Pure and nickel doped copper sulfide (CuS) nanostructure were prepared by hydrothermal method for 5 h at 150∘C. Structural, morphological and optical properties of the CuS nanostructure were studied for different Ni-doping concentration of 1%, 2%, 3%, 4%, and 5 %. X-ray diffraction studies showed the polycrystalline nature with hexagonal phase structure of CuS and Ni: CuS nanostructure. FE-SEM image showed that nickel doping concentration affected the nanostructure morphology. The absorbance spectra were then recorded at wavelengths ranging from 350 nm to 1000 nm, where the CuS nanostructures have strong absorbance in the NIR. The optical band gap energy of the samples increased as nickel concentration increasing. In particular, their optical band gap energies were 3.25, 3.48, 3.49, 3.49, 3.45 and 3.44 eV for undoped and Ni-doped CuS nanostructure with concentrations (1%, 2%, 3%, 4% and 5%), respectively. The antibacterial activity of Copper sulfide nanostructure against P. aeruginosa, E. coli, and S. aureus was evaluated by zone of inhibition. The test revealed that copper sulfide nanostructure have a strong antibacterial activity against gram-positive than for gram-negative with low concentration of CuS.

Keywords: Copper sulfide nanostructure; nickel doping; structural properties; morphological properties; optical properties; hydrothermal method; antibacterial activity (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1142/S0218625X20500316

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