Green Synthesis of Platinum Nanoparticles Using Polymer Bio-reduction Approach and Their Photocatalytic Organic Dye Degradation

Over the past few decades, the green synthesis of nanomaterials has emerged as an environmentally friendly and sustainable technology for effectively decolourization of dyes. Polysaccharides, recognized for their affordability and efficacy, have become ideal materials for nanoparticle synthesis. The study used a green method to make platinum nanoparticles (PtNPs) from the sesbania polysaccharide, for photocatalytic activities. Different instrumental methods were used to describe the synthesized SPtNPs, including FTIR, FESEM, TEM, XRD, and XPS analysis. XPS analysis played a crucial role in examining the purity and chemical stability of the synthesized SPtNPs. TEM micrographs revealed the homogeneous and spherical shape of the nanoparticles. The photocatalytic activity of the SPtNPs was assessed in the organic dyes, with a particular focus on Rose Bengal in wastewater treatment. The SPtNPs exhibited a high photodegradation capacity for the anionic dye, degrading 98.5% of Rose Bengal within 60 min under Visible light. Additionally, a notable achievement in catalyst recyclability was observed. The catalyst having a higher degradation efficiency of 94.8% in after 3 cycles and revealing a calculated rate constant (k) of 0.3408 min-1. This study emphasizes the competitive advantage of environmentally friendly technology over traditional physical and chemical approaches in SPtNP synthesis, emphasizing its efficacy. This technology's green and efficient nature holds significant potential for diverse industrial applications. Furthermore, it shows that it is possible to make nanomaterials in a way that is both sustainable and good for the environment. Specifically, the biosynthesis of SPtNPs is a groundbreaking way to create useful and good products for the environment.Graphical AbstractSchematic presentation of green synthesized SPtNPs and photocatalytic dye degradation