Simple One-Step Synthesis of Bimetallic Au–Ag Nanoparticles: Integrated Nanoscience Laboratory Project

Abstract

As part of the nanosciences optional seminar for undergraduate students of chemistry career, a comprehensive practical activity was made to reinforce and integrate concepts related to nanoscience, nanotechnology, and green chemistry while introducing the scientific method. Specifically, this laboratory project focuses on the synthesis of gold (AuNPs), silver (AgNPs), and bimetallic gold–silver (Au–AgNPs) nanoparticles using honey as a green reducing and stabilizing agent. Furthermore, the influence of Ag:Au molar ratio, temperature, and reaction time on the bimetallic nanoparticle synthesis was evaluated, and the obtained materials were characterized by UV–vis spectroscopy, transmission electron microscopy (TEM), dynamic light scattering (DLS), ζ potential, and cyclic voltammetry (CV) methods. The experiment not only introduces the students to the skills of sample preparation and instrument operation but also serves as a valuable hands-on experience to explore the frontiers of knowledge, consolidate their learning of the key theoretical concepts, and reinforce the soft skills related to problem-solving, critical thinking, and the effective communication of their research.