Photocatalytic and antibacterial activities of green-mediated Khaya senegalensis-silver nanoparticles and oxidized carbon nanotubes

Authors

  • A. H. Labulo Department of Chemistry, Federal University of Lafia, Lafia, Nasarawa State, Nigeria
  • A. D. Terna Department of Chemistry, Federal University of Technology, PMB 1526, Owerri, Imo State, Nigeria
  • O. F. Oladayo Department of Chemistry, Federal University of Lafia, Lafia, Nasarawa State, Nigeria
  • H. Ibrahim Department of Chemistry, Federal University of Lafia, Lafia, Nasarawa State, Nigeria
  • N. S. Tanko Department of Chemistry, Federal University of Lafia, Lafia, Nasarawa State, Nigeria
  • R. A. Ashonibare Durable Crops Research Department, Nigerian Stored Products Research Institute, P.M.B. 1489, Ilorin, Kwara State, Nigeria
  • J. D. Opeyemi Department of Chemistry, Federal University of Lafia, Lafia, Nasarawa State, Nigeria
  • Z. Tywabi-Ngeva Department of Chemistry, Faculty of Science, Centre for Rubber Science and Technology, Nelson Mandela University, Gqeberha, South Africa, 6001.

Keywords:

Khaya senegalensis, silver nanoparticles, carbon nanotubes, photocatalytic, antibacterial activity

Abstract

This study investigated the photocatalytic and antibacterial activities of plant-mediated silver nanoparticles (AgNPs) from a medicinal plant extract of Khaya senegalensis (K. senegalensis) and oxygen functionalized carbon nanotubes (oCNTs), respectively. The CNTs were functionalized using acid treatment. The green synthesized AgNPs from K. senegalensis (KS-AgNPs) and oCNTs were characterized by UV–Visible spectroscopy, Fourier transform infrared spectroscopy (FTIR), transmission emission microscopy (TEM), scanning electron microscopy (SEM), and X-ray diffraction (XRD). The formation of KS-AgNPs was confirmed by the UV–Vis absorption spectra, which showed an absorption band at 427 nm with a color change from yellow to brown. The morphology of KS-AgNPs was spherical in shape, with an average particle size of 9.30 nm. The FTIR analyses revealed distinctive functional groups, such as, hydroxyl (O-H), amines (N-H), and carbonyl (C-O), which were directly involved in the synthesis and stability of AgNPs. The XRD spectra was distinctive with five intense peaks at 2theta angles of 38.12°, 44.28°, 64.43°, 77.48°, and 81.54o while oCNTs gave intense peaks at 2theta angles of 26.43o, 42.36o, 44.46o, 54.51o, 59.98o, and 77.40o. The photocatalytic property of green synthesized KS-AgNPs was determined to be 40.7 % higher than that of oCNTs when applied for treatment of industrial waste water. The ability of green-mediated KS-AgNPs to inhibit against gram-positive and gram-negative bacteria was observed to be that gram (-) bacteria (E. coli) was more susceptible to KS-AgNPs than the gram (+) bacteria (S. aureus), in which case their susceptibility was least in oCNTs for both bacteria, respectively.

Dimensions

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Published

2023-06-21

How to Cite

Photocatalytic and antibacterial activities of green-mediated Khaya senegalensis-silver nanoparticles and oxidized carbon nanotubes. (2023). Journal of the Nigerian Society of Physical Sciences, 5(3), 1438. https://doi.org/10.46481/jnsps.2023.1438

Issue

Volume 5, Issue 3, August 2023

Section

Original Research
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Copyright (c) 2023 A. H. Labulo, A. D. Terna, O. F. Oladayo, H. Ibrahim, N. S. Tanko, R. A. Ashonibare, J. D. Opeyemi, Z. Tywabi-Ngeva

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This work is licensed under a Creative Commons Attribution 4.0 International License.

How to Cite

Photocatalytic and antibacterial activities of green-mediated Khaya senegalensis-silver nanoparticles and oxidized carbon nanotubes. (2023). Journal of the Nigerian Society of Physical Sciences, 5(3), 1438. https://doi.org/10.46481/jnsps.2023.1438