As an alternative to physical and chemical synthesis, green synthesis of metal nanoparticles provides a non-toxic way to create nanoparticles. The goal of this study is to create silver nanoparticles (AgNPs) by combining lignin as a reducing agent, which is extracted from Cocos Nucifera (coconut) husks and screened their photocatalytic activity for the removal of methylene blue (MB) dye. UV�Visible and FTIR spectroscopy were used to analyse the synthesised AgNPs, while TEM and FESEM-EDX were used to screen the surface morphology. TEM and SEM evidenced that the AgNPs resultant is sphere-shaped, with a particle size in the range of 20�40 nm. The photocatalytic activity of the AgNPs alongside NaBH4 to degrade MB was then evaluated. According to the findings, the AgNPs degraded the MB by 90.60 in just 30 min. The degradation pathway obeyed pseudo-first order reaction kinetics with k = 0.0678 min�1. © 2023 Elsevier B.V.