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primary topic: Growth kinetic study of ionic liquid mediated synthesis of gold nanoparticles using Elaeis guineensis (oil palm) kernels extract under microwave irradiation

Growth kinetic study of ionic liquid mediated synthesis of gold nanoparticles using Elaeis guineensis (oil palm) kernels extract under microwave irradiation
type: AcademicArticle
type: Article
abstract: Gold nanoparticles (AuNPs) are the most studied nanomaterials due to their promising applications. However, surface capping of AuNPs is essential to protect aggregation for enhanced colloidal stability. In this study, a single step method was established to synthesize stable AuNPs using oil palm kernel (OPK) extract prepared in ILEMIMOAc (1-ethyl-3-methylimidazolium acetate). Ionic liquids were used for phytochemicals extraction along with capping and stabilizing of AuNPs after their synthesis. The OPK extract reduced the gold precursor, and UVâ��vis spectroscopy revealed a sharp surface plasmon (SPR) peaks in the region of 524â��529 nm, which confirmed the formation of AuNPs. UVâ��vis and TEM analysis indicated that microwave assisted synthesis was rapid to synthesize well dispersed and small sized AuNPs in comparison with conventional heating. FTIR analysis of kernels extract before and after its reaction with gold precursor identified the involvement of CsbndH aromatic groups, polyphenolic OsbndH groups, and carbonyl amide groups that are responsible for reduction of trivalent gold ions to AuNPs. EDAX and XPS analysis were performed to identify the elemental gold and its surface interaction with ILs and other organic moieties. Colloidal AuNPs kept at room temperature for periods of six months were remained stable. The change of pristine nanostructure arises due to involvement of different driving forces during growth of nanoparticles. Thermodynamically instability of nanomaterials may leads to Ostwald Repining (OR) or adopt complex pattern of growth and undergo coalesce and orientation attachment (OA). These models were fitted to compare the theoretically growth of particles along with actual increase of particles size. Experimental results suggested that OA growth was originated in early phase, however, it substituted and mainly controlled by OR growth pattern over time. © 2017 King Saud University
date: 2020
volume: 13
issue: 1
is part of: Arabian Journal of Chemistry
status: peerReviewed
status: published
author list: authors
type: EPrint
type: ArticleEPrint
is part of: repository

Elsevier B.V.
type: Organization

Arabian Journal of Chemistry
type: Collection
issn: 18785352

P.C. Mandal
type: Person
given name: P.C.
family name: Mandal

M. Irfan
type: Person
given name: M.
family name: Irfan

B. Abdullah
type: Person
given name: B.
family name: Abdullah

S. Bhattacharjee
type: Person
given name: S.
family name: Bhattacharjee

M. Moniruzzaman
type: Person
given name: M.
family name: Moniruzzaman

T. Ahmad
type: Person
given name: T.
family name: Ahmad

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primary topic: Growth kinetic study of ionic liquid mediated synthesis of gold nanoparticles using Elaeis guineensis (oil palm) kernels extract under microwave irradiation