Growth-controlled synthesis of polymer-coated colloidal-gold nanoparticles using electrospray-based chemical reduction (Open Access)--颗粒学报PARTICUOLOGY

Hussain, M. H., Abu Bakar, N. F., Low, K.-F., Mustapa, A. N., Adam, F., Naim, M. N., & Lenggoro, I. W. (2021). Growth-controlled synthesis of polymer-coated colloidal-gold nanoparticles using electrospray-based chemical reduction. Particuology, 57, 72-81. https://doi.org/10.1016/j.partic.2020.12.004

Growth-controlled synthesis of polymer-coated colloidal-gold nanoparticles using electrospray-based chemical reduction (Open Access)

Mohamed Hasaan Hussain ^a, Noor Fitrah Abu Bakar ^a *, Kim-Fatt Low ^b, Ana Najwa Mustapa ^a, Fatmawati Adam ^c, Mohd Nazli Naim ^d, I. Wuled Lenggoro ^{e f}

a Faculty of Chemical Engineering, Universiti Teknologi MARA, Shah Alam, Selangor 40450, Malaysia
b Faculty of Applied Sciences, Universiti Teknologi MARA, Perak Branch, Tapah Campus, Tapah Road, Perak 35400, Malaysia
c Faculty of Chemical and Process Engineering Technology, Universiti Malaysia Pahang, Lebuh Raya Tun Razak, Gambang, Pahang 26300, Malaysia
d Department of Process and Food Engineering, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia
e Graduate School of Bio-Applications and Systems Engineering, Tokyo University of Agriculture and Technology, Naka Cho, 2-24-16, Koganei, Tokyo 184-8588, Japan
f Department Chemical of Engineering, Tokyo University of Agriculture and Technology, Naka Cho, 2-24-16, Koganei, Tokyo 184-8588, Japan

10.1016/j.partic.2020.12.004

Volume 57, August 2021, Pages 72-81

Received 27 July 2020, Revised 16 November 2020, Accepted 2 December 2020, Available online 2 March 2021, Version of Record 2 March 2021.

E-mail: fitrah@uitm.edu.my

Highlights

• Monodispersed PVP-stabilized gold nanoparticles produced in aqueous region.

• GNP nucleation and growth controlled by electrospray mist into liquid reaction.

• Electrospray flow rate, droplet size, and current affected properties of GNP.

• Electrospray droplet and Au³⁺ concentration influenced GNP size, morphology, and PDI.

Abstract

In this study, the controlled nucleation and growth of gold nanoparticles (GNPs) were investigated using a self-repelled mist in a liquid chemical reaction environment. An electrospray-based chemical reduction method was conducted in the aqueous region and at room temperature to synthesize the polymeric-stabilized gold nanoparticles. The electrospray technique was used to atomize a hydrogen tetrachloraurate (III) (HAuCl₄) precursor solution into electrostatically charged droplets. The atomized droplets were dispersed in an aqueous reaction bath containing L-ascorbic acid as a reducing agent and polyvinylpyrrolidone (PVP) as a stabilizer. The effect of the electrospray parameters, specifically the flow rate and electrospray droplet size, as well as the reaction conditions such as the concentration of reactants, pH, and stabilizer (PVP), were investigated. The mean diameter of the GNPs increased from around 4 to 9 nm with an increase in the electrospray flow rate, droplet size, and current passing through the electrospray jet. Spherical and monodispersed GNPs were synthesized at a relatively high flow rate of 2 mL/h and a moderate concentration of 2 mM of precursor solution. The smallest-sized GNP with a high monodispersity was obtained in the reaction bath at a high pH of 10.5 and in the presence of PVP. It is expected that continuous and mass production of the engineered GNPs and other noble metal nanoparticles could be established for scaling up nanoparticle production via the proposed electrospray-based chemical reduction method.

Graphical abstract

Keywords

Electrospray; Gold nanoparticles; Chemical reduction method; L-ascorbic acid; PVP; Aqueous medium

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