Fabrication of ZnO /Ag Nanocomposite and Their Antibacterial Activities
Keywords:ZnO /Ag nanocomposites, hydrothermal, TEA, antibacterial.
AbstractThe ZnO nano powder has been successfully synthesized by a simple hydrothermal technique using zinc acetate and Triethanolamine (TEA) as surfactant agents. The resultant powder was annealed at 140 ᵒC for 12 hours. The as – synthesized ZnO nanopowder was then mixed with AgNO3 to prepare ZnO /Ag nanocomposites. The structural, morphological, and optical properties were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and UV-Visible spectroscopy (UV-Vis). The characterization results confirm that Ag nanoparticles (NPs) have been covered the ZnO hexagonal NPs, and show the red shift with the peak centered at 334 nm, which is due to the interfacial electron coupling between ZnO and Ag NPs, the surface Plasmon peak centered at 403 nm was detected along with the excitonic peak of ZnO confirming the formation of ZnO /Ag nanocomposite. The antibacterial effect of ZnO / Ag nanocomposites was studied for Gram- negative (E.coli) and Gram– positive (Staphylococcus aureus), which showed that the diameter of the inhibition zone of pathogenic bacteria about 15 mm for E.coli and did not show any activity for Staphylococcus aureus.
S. Shrivastava, T. Bera, A. Roy, G. Singh, P. Ramachandrarao, and D. Dash, Characterization of enhanced antibacterial effects of novel silver nanoparticles, IOP PUBLISHING, Nanotechnology 18, 225103 (9pp), (2007).
Vaseashta A and D. Malinovska, Nanostructured and nanoscale devices, sensors and detectors, Sci. Technol. Adv. Mater. 6 312–8, (2005).
M. Aguirre, H. Rodríguez, E. San Román, A. Feldhoff, M. Grela, Ag@ ZnO core–shell nanoparticles formed by the timely reduction of Ag+ ions and zinc acetate hydrolysis in N, N-dimethylformamide: mechanism of growth and photocatalytic properties, J. Phys. Chem. C.115, 24967-24974, (2011).
Z. Yang, P. Zhang, Y. Ding, Y. Jiang, Z. Long, W. Dai, Facile synthesis of Ag/ZnO
heterostructures assisted by UV irradiation: Highly photocatalytic property and enhanced
photostability, Mater. Res. Bull. 46, 1625–1631, (2011).
A. Al-Ghamdi, O. Al-Hartomy, M. El Okr, A. Nawar, S. El- Gazzar, F. El-Tantawy, F. Yakuphanoglu, Semiconducting properties of Al doped ZnO thin films, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 131, 512–517, (2014).
K. Raja, P. Ramesh, D. Geetha, Synthesis, structural and optical properties of ZnO and Ni-doped ZnO hexagonal nanorods by Co-precipitation method, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 120, 19-24, (2014).
K. Tam, A. Djurisic, C. Chan, Y. Xi, C. Tse, Y. Leung, W. Chan, F. Leung, D. Au, Antibacterial activity of ZnO nanorods prepared by hydrothermal method, Thin Solid Films 516, 6167e6174, (2008).
L. Zhang, Y. Ding, M. Povey, D. York, ZnO nanofluids… a potential antibacterial agent, Prog. Nat. Sci. 18, 939e944, (2008).
J. Morones, J. Elechiguerra, A. Camacho, K. Holt, J. Kouri, J. Ram´ırez, and M. Yacaman, The bactericidal effect of silver Nanoparticles, Nanotechnology 16, 2346–2353,(2005).
M. Talari, A. Majeed, D. Tripathi, and M. Tripathy, Synthesis, Characterization and Antimicrobial Investigation of Mechanochemically Processed Silver Doped ZnO Nanoparticles, Chem. Pharm. Bull. 60(7) 818–824 (2012).
R. Saleh, N. Djaja, Transition-metal-doped ZnO nanoparticles: Synthesis, characterization and photocatalytic activity under UV light, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 130, 581- 590, (2014).
X. Ma, W. Zhang, Effects of flower-like ZnO nanowhiskers on the mechanical, thermal and antibacterial properties of waterborne polyurethane, Polym. Degrad. Stab. 94 (2009) 1103–1109.
How to Cite
Articles accepted for publication in Al-Mustansiriyah Journal of Science (MJS) are protected under the Creative Commons Attribution 4.0 International License (CC BY-NC). Authors of accepted articles are requested to sign a copyright release form prior to their article being published. All authors must agree to the submission, sign copyright release forms, and agree to be included in any correspondence between MJS and the authors before submitting a work to MJS. For personal or educational use, permission is given without charge to print or create digital copies of all or portions of a MJS article. However, copies must not be produced or distributed for monetary gain. It is necessary to respect the copyright of any parts of this work that are not owned by MJS.