Biosynthesis of Platinum Nanoparticles PlNPs by Bacterial Strain Rhodococcus erythropolis

Abstract

The biosynthesis of platinum nanoparticles (PlNPs) using the bacterial strain Rhodococcus erythropolis offers a greener alternative to conventional chemical and physical synthesis methods. This study explores the potential of R. erythropolis to produce PlNPs by leveraging its biological machinery to reduce platinum ions and stabilize the resulting nanoparticles. The biosynthesis was conducted under varying conditions of pH, temperature, and sodium platinite concentrations to optimize yield and particle characteristics. The nanoparticles were characterized. The outcome reflects that PlNPs exhibit distinct size-dependent optical properties and crystallinity, with extracellular proteins from R. erythropolis playing a crucial role in nanoparticle stabilization. The optimized biosynthesis process produced PlNPs with high colloidal stability and significant potential for applications in catalysis and environmental remediation. This study advances the understanding of microbial nanoparticle production, highlighting a sustainable pathway for the synthesis of biocompatible and catalytically active platinum nanoparticles.