Antibacterial Activites of the CuO/ZnO Nanocomposite Grown on Silica Extracting from Bagasse Ash

  • Yirgalem Negash
  • Birhanu Tolosa
  • Tegene Bantewesen
  • Gebisa Bekele Feyisa ASTU
Keywords: sugarcane bagasse ash, Sol-gel, CuO/ZnO, Silica, Antibacterial activities

Abstract

Nano-scaled Zinc oxide and Copper oxide semiconductors have been widely used as antibacterial agents because of low cost and non-toxicity, but high agglomeration and high electron-holes recombination rates hinder their performances. In this work, we synthesized silica-supported CuO/ZnO and CuO/ZnO bare nanocomposites by the sol-gel technique. The antibacterial activities of both nanocomposites have compared on Gram-negative (E. coli) and Gram-positive (S. aura) bacteria. The average crystal sizes of CuO/ZnO bare is 16.3 nm, and silica-supported CuO/ZnO is 29.1 nm as calculated from XRD data. Moreover, SEM results showed that there was no agglomeration in silica-supported CuO/ZnO due to the presence of silica. When antibacterial activities of both nanocomposites were tested by using the agar diffusion method, silica-supported CuO/ZnO showed an inhibition zone of 51% for Staphylococcus aureus and 53% for Escherichia coli compared with that of CuO/ZnO bare. Therefore, silica-supported CuO/ZnO nanocomposite is a promising antibacterial agent because of its low cost, non-toxicity, and good antibacterial properties..

Published
2020-12-24
How to Cite
Negash, Y., Tolosa, B., Bantewesen, T., & Feyisa, G. (2020). Antibacterial Activites of the CuO/ZnO Nanocomposite Grown on Silica Extracting from Bagasse Ash. Ethiopian Journal of Sciences and Sustainable Development, 8(1), 65-72. https://doi.org/10.20372/ejssdastu:v8.i1.2021.319
Section
Articles