Influence of Li-Co co-doping on structural and optical properties as well as on antibacterial activity of ZnO. (27th September 2019)

• Record Type: Journal Article
• Authors: Haq, Sami Ul; Khattak, Shaukat Ali; Jan, Tariq; Khan, Rajwali; Zulfiqar, ; Ullah, Irfan; Khan, Tahirzeb; Shah, Said Karim; Khan, Gulzar; Ahmad, Riaz
• Is Part Of: Materials research express. Volume 6:Number 11(2019)
• Publication Date: 2019-09-27
• Subjects: nano structures -- ZnO -- structural properties -- co doping -- anti-bacterial activity; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/ab4497
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: We report the influence of the codoping of Li and Co into ZnO on the structural and optical properties as well as on the antibacterial activity of ZnO nanostructures, synthesized via co-precipitation technique. Confirmed by x-ray diffraction (XRD), the prepared samples (ZnO, Li0.015 Co0.015 Zn0.97 O and Li0.03 Co0.03 Zn0.94 O) exhibit hexagonal wurtzite structures where inclusion of the dopants (Li and Co) into the ZnO reduces the crystallite size from 16.43 ± 1.02 to 15.12 ± 1.02 nm. Scanning electron microscopy (SEM) reveals the shape of the particles to be spherical while energy-dispersive spectroscopy (EDS) confirms the elemental composition of the samples. The doping of Li and Co reduces the oxygen content in the ZnO, significantly for Li0.015 Co0.015 Zn0.97 O. Ultraviolet-visible (UV–vis) spectroscopy and photoluminescence (PL) determine a similar, approximately, band gap of the nanostructures. The emission intensity is found to be maximum for Li0.015 Co0.015 Zn0.97 O in the visible range and increased antibacterial activity is evidenced for Li0.03 Co0.03 Zn0.94 O against pseudomonas aeruginosa bacterium.