in the current study, isoimperatorin, a natural furanocoumarin, is used as a reducing reagent to synthesize isoimperatorin mediated silver nanoparticles (iso-Agnps), and photocatalytic and electrocatalytic activities of iso-Agnps are evaluated. iso-Agnps consisted of spherically shaped particles with a size range of 79-200 nm and showed catalytic activity for the degradation (in high yields) of New Fuchsine (NF), Methylene Blue (MB), Erythrosine B (ER) and 4-chlorophenol (4-CP) under sunlight irradiation. Based on obtained results, Iso-AgNPs exhibited 96.5%, 96.0%, 92%, and 95% degradation rates for MB, NF, ER, and 4-CP, respectively. The electrochemical performance showed that the as-prepared iso-Agnps exhibited excellent electrocatalytic activity toward hydrogen peroxide (H 2 o 2) reduction. it is worth noticing that the iso-Agnps were used as electrode materials without any binder. The sensor-based on binder-free Iso-AgNPs showed linearity from 0.1 µM to 4 mM with a detection limit of 0.036 μM for H 2 o 2. this binder-free and straightforward strategy for electrode preparation by silver nanoparticles may provide an alternative technique for the development of other nanomaterials based on isoimperatorin under green conditions. Altogether, the application of isoimpratorin in the synthesis of nano-metallic electro and photocatalysts, especially silver nanoparticles, is a simple, cost-effective and efficient approach. Recently, isolated and purified natural products have gained considerable attention in the synthesis and cap of metallic nanoparticles. These natural product-induced metallic nanoparticles (NPIMNPs) have been widely used in the biological, environmental, electrochemical, and catalytic fields 1-8. Albeit plant extracts are considered as general sources for the green synthesis of metallic nanoparticles 9 , the extracts compositions and concentrations of substances are highly variable, affected by the method of extraction, harvesting season and geographical parameters. As an alternative, the pure natural products with a well-defined concentration of reactant can synthesize reproducible metallic nanoparticles, and the purification of nanoparticles is more facile 10,11. Furthermore, physicochemical and biological characteristics of natural products can improve the biological, electrochemical, and catalytic properties of NPIMNPs. In this regard, natural products e.g., phenolic compounds, alkaloids, terpenoids, amino acids, flavonoids, glutathiones, quinones antioxidants, polysaccharides, organic acids, and coumarins have been used 12. The synthesis of nanoparticles by these natural products is a clean, non-toxic, and environmental-friendly 13. Compared to their counterparts, synthesized by other methods, NPIMNPs possess improved bioactivities and catalytic characteristics 12. Among metallic nanoparticles, silver nanoparticles have been widely studied for catalytic activities. AgNPs can demonstrate light absorption and significant visible light catalytic activity due to its narrow bandgap energy
