Green synthesis of stabilized spherical shaped gold nanoparticles using novel aqueous Elaeis guineensis (oil palm) leaves extract

Ahmad, T. and Bustam, M.A. and Irfan, M. and Moniruzzaman, M. and Anwaar Asghar, H.M. and Bhattacharjee, S. (2018) Green synthesis of stabilized spherical shaped gold nanoparticles using novel aqueous Elaeis guineensis (oil palm) leaves extract. Journal of Molecular Structure, 1159 . pp. 167-173.

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In the last decade, development of bioinspired protocols to synthesize gold nanoparticles (AuNPs) using plants and their extracts have been dealt by researchers due to their low cost, renewability and non-toxic features. A simple, cheap and ecofriendly method is reported to synthesize stabilized AuNPs of size 35�75 nm at room temperature using aqueous Elaeis guineensis (oil palm) leaves extract without addition of any external agent. Oil palm leaves mediated AuNPs were characterized using FTIR, UV�vis spectrophotometer, EDAX, XPS, FESEM, TEM, DLS and TGA. FTIR spectra results revealed contribution of phenolic, carboxylic, amines and amides in reduction of trivalent gold ions and stabilization of formed gold atoms. Reaction solution color change and UV�vis spectra confirmed reduction of gold ions to generate gold atoms. Reaction mechanism explained the role of phenolic compounds in reduction reaction using FTIR and UV�vis spectra results. EDAX and XPS results further validated the formation of metallic gold particles through bioreduction of gold ions. Crystal structure of metallic gold particles was confirmed through XRD peaks indexing to (111), (200), (220) and (311) planes. TEM and FESEM particles size measurements exhibited the formation of nanostructured AuNPs. Synthesis of well scattered and spherical shaped AuNPs was revealed through FESEM and TEM images. The excellent stability of AuNPs was shown through high negative zeta potential value (�14.7 ± 4.68 mV) and uniform dispersion in aqueous media. Our results disclosed the excellent potential of Elaeis guineensis (oil palm) leaves as reducing and stabilizing agents in green synthesis of well scattered spherical shaped AuNPs, which can be employed as strong candidates in medical drug delivery and industrial applications. © 2017 Elsevier B.V.

Item Type:Article
Impact Factor:cited By 2
Uncontrolled Keywords:Crystal structure; Fiber optic sensors; Fourier transform infrared spectroscopy; Gold; Ions; Metal nanoparticles; Nanoparticles; Palm oil; Plants (botany); Spheres; Synthesis (chemical); X ray photoelectron spectroscopy, Gold Nanoparticles; Green synthesis; Negative zeta potentials; Oil palm; Phenolic compounds; Reaction mechanism; Stabilizing agents; Uniform dispersions, Drug delivery
ID Code:21583
Deposited By: Ahmad Suhairi
Deposited On:01 Aug 2018 03:09
Last Modified:01 Aug 2018 03:09

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