Green Synthesis and Characterization of Platinum Nanoparticles

The noble metal of platinum nanoparticles (PtNPs) with attractive physicochemical properties would hold great promise in various fifield of catalysis, electro analytica, biomedical applications, chemical industry and biosensor. However, it still existed a great challenges in controlling its particle size, morphology and structure. Here, we developed an environmentally friendly, facile, cost-effective, and nontoxic approach for green synthesis of platinum nanochains and platinum nanopetals under ambient conditions in a shorter reaction time. Platinum nanoparticles was prepared by hydrothermal method, and the platinum nanopetals was synthesized by self-assembly on the basis of platinum nanochains sol. The synthesis process of platinum nanoparticles was monitored and analyzed by a UV-visible spectrophotometer and the stability of the synthesized products was scientifically evaluated. In addition, the micromorphology, crystal structure, valence state and characteristic absorption peaks of the products were characterized by transmission electron microscope (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV-vis absorption spectras (UV-vis) and zeta potential, respectively. These characterization results inferred that platinum nanochains were well distributed with small spherical shape in single particle with average particle sizes of around 3 nm, platinum nanopetals with diameter of 20 nm. And their UV characteristic absorption peaks remained constant for 90 days at 4°C. This work output can acts as a valuable experience for other relevant researchers towards the synthesis, characterization and application formation.