Bio-Synthesis of AgNPs and MnNPs of Philodendron giganteum Herbal Extract and catalysis’s activity

Abstract

We are presenting our successful bio-synthesis of silver nanoparticles (AgNPs) and manganese nanoparticles (MnNPs) using aqueous extracts from the leaves of P. giganteum, a plant native to India. The aqueous extract from P. giganteum serves as a bio-reductant, facilitating the conversion of Ag⁺ to Ag⁰ during incubation in a dark environment. UV–Vis characterization revealed surface plasmon resonance peaks for AgNPs in the wavelength range of 410–460nm. Scanning electron microscopy energy-dispersive X-ray spectrometry (SEM-EDS) confirmed the agglomeration and spherical shapes of AgNPs and MnNPs with diameters ranging from 18-54nm. The TEM and X-ray diffraction shows that both the nanoparticle is crystalline in nature and AgNPs particles are fcc crystalline in nature. The outstanding catalytic activity of AgNPs was demonstrated by employing the reduction of 4-nitrophenol to 4-aminophenol.