Izzi Margherita, Sportelli Maria C, Tursellino Luciana, Palazzo Gerardo, Picca Rosaria A, Cioffi Nicola, López Lorente Ángela I
Department of Chemistry, University of Bari "Aldo Moro", Via Orabona, 4, 70126 Bari, Italy.
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.
Nanomaterials (Basel). 2020 Mar 27;10(4):622. doi: 10.3390/nano10040622.
Gold nanoparticles (AuNPs) were produced using stainless steel as a solid reductant to assist the synthesis of metal NPs, using HAuCl 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 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.
以不锈钢作为固体还原剂,以氯金酸为前驱体,制备了金纳米颗粒(AuNPs)以辅助金属纳米颗粒的合成。该方法非常简便、快速且具有成本效益,无需额外的封端剂即可合成高度稳定的纳米颗粒。然而,其反应机理仍存在争议。为了有助于研究使用不锈钢合成AuNPs的过程,测试了不同的实验条件。系统地改变了氯离子浓度、前驱体溶液的pH值以及不锈钢的成分。在特定条件下,通过记录开路电位进行合成,以电位法探究该体系的电化学性质。在电位监测的同时进行了光谱和形态表征,旨在将合成参数与AuNPs的特性相关联。结果,获得了该过程特征及其最合理机理的概述。