Biogenic synthesis of silver nanoparticles using a pod extract of Cola nitida: Antibacterial and antioxidant activities and application as a paint additive

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dc.contributor.authorLateef A
dc.contributor.authorAzeez MA
dc.contributor.authorAsafa TB
dc.contributor.authorYekeen TA
dc.contributor.authorAkinboro A
dc.contributor.authorOladipo IC
dc.contributor.authorAzeez L
dc.contributor.authorAjibade SE
dc.contributor.authorOjo SA
dc.contributor.authorGueguim-Kana EB
dc.contributor.authorBeukes LS
dc.date.accessioned2022-07-27T19:26:30Z
dc.date.available2022-07-27T19:26:30Z
dc.date.issued2016
dc.descriptionJournal of Taibah University for Science
dc.description.abstractThis work reports the biogenic synthesis of silver nanoparticles (AgNPs) using the pod extract of Cola nitida, the evaluation of their antibacterial and antioxidant activities, and their application as an antimicrobial additive in paint. The AgNPs were characterized with UV–Vis spectroscopy, Fourier-transform infrared (FTIR) spectroscopy, and transmission electron microscopy (TEM). The AgNP solution was dark brown with a maximum absorbance occurring at 431.5nm. The FTIR spectrum showed strong peaks at 3336.85, 2073.48, and 1639.49cm−1, indicating that proteins acted as the capping and stabilization agents in the synthesis of the AgNPs. The AgNPs were spherical, with sizes ranging from 12 to 80nm. Energy dispersive X-ray (EDX) analysis showed that silver was the prominent metal present, while the selected area electron diffraction pattern conformed to the face-centred cubic phase and crystalline nature of AgNPs. At various concentrations between 50 and 150μg/ml, the AgNPs showed strong inhibition of the growth of multidrug resistant strains of Klebsiella granulomatis, Pseudomonas aeruginosa, and Escherichia coli. In addition, at 5μg/ml, the AgNPs completely inhibited the growth of Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Aspergillus niger, A. flavus and A. fumigatus in a paint-AgNP admixture. The AgNPs exhibited a potent antioxidant activity with an IC50 of 43.98μg/ml against 2,2-diphenyl-1-picrylhydrazyl and a ferric ion reduction of 13.62–49.96% at concentrations of 20–100μg/ml. This study has demonstrated the biogenic synthesis of AgNPs that have potent antimicrobial and antioxidant activities and potential biomedical and industrial applications. To the best of our knowledge, this work is the first to use the pod extract of C. nitida for the green synthesis of nanoparticles.
dc.identifier.citation10.1016/j.jtusci.2015.10.010
dc.identifier.issn1658-3655
dc.identifier.urihttps://nerd.ethesis.ng/handle/123456789/418
dc.language.isoen
dc.subjectpod
dc.subjectSilver nanoparticles
dc.subjectAntimicrobial activity
dc.subjectMulti-drug resistance
dc.subjectPaint
dc.subjectAntioxidant
dc.titleBiogenic synthesis of silver nanoparticles using a pod extract of Cola nitida: Antibacterial and antioxidant activities and application as a paint additive
dc.typeArticle
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