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Open AccessFeature PaperArticle

Gold Nanoparticles Synthesis Using Stainless Steel as Solid Reductant: A Critical Overview

1
Department of Chemistry, University of Bari “Aldo Moro”, Via Orabona, 4, 70126 Bari, Italy
2
Departamento de Química Analítica, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUIQFN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, Spain
*
Authors to whom correspondence should be addressed.
Nanomaterials 2020, 10(4), 622; https://doi.org/10.3390/nano10040622
Received: 3 March 2020 / Revised: 22 March 2020 / Accepted: 24 March 2020 / Published: 27 March 2020
(This article belongs to the Special Issue Nanomaterials Based on IV-Group Semiconductors)
Gold nanoparticles (AuNPs) were produced using stainless steel as a solid reductant to assist the synthesis of metal NPs, using HAuCl4 as a precursor. This method is very easy, quick, and cost-effective, allowing the synthesis of highly stable NPs without additional capping agents. However, the reaction mechanism is still under debate. In order to contribute to the investigation of the synthesis of AuNPs using stainless steel, different experimental conditions were tested. Cl concentration, pH of the precursor solution, as well as stainless steel composition were systematically changed. The syntheses were performed recording the open circuit potential to potentiometrically explore the electrochemical properties of the system, under operando conditions. Spectroscopic and morphological characterizations were carried out along with potentiometric monitoring, aiming at correlating the synthesis parameters with the AuNPs characteristics. As a result, an overview of the process features, and of its most reasonable mechanism were obtained. View Full-Text
Keywords: gold nanoparticle; stainless steel corrosion; plasmonic particle; aqueous metal colloid gold nanoparticle; stainless steel corrosion; plasmonic particle; aqueous metal colloid
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Izzi, M.; Sportelli, M.C.; Tursellino, L.; Palazzo, G.; Picca, R.A.; Cioffi, N.; López Lorente, Á.I. Gold Nanoparticles Synthesis Using Stainless Steel as Solid Reductant: A Critical Overview. Nanomaterials 2020, 10, 622.

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