Green synthesis of metal nanoparticles from three medicinal plants: a review of environmental and health applications
K. K. Ilavenil, V. Senthilkumar, A. Kasthuri
Abstract
The eco-friendly synthesis of metal nanoparticles utilising medicinal plants has emerged as a sustainable alternative to traditional chemical processes. This review concentrates on three medicinal plants— Bryophyllum pinnatum , Oxalis corniculata , and Trianthema portulacastrum —recognized for their abundant phytochemical profiles and therapeutic attributes. These plants have demonstrated significant potential in the creation of nanoparticles for many uses in medicine, environmental remediation, and agriculture. The study emphasises recent progress in utilising plant extracts as reducing and stabilising agents for the production of nanoparticles. Focussing on the bioactive compounds found in these plants—such as terpenoids, alkaloids, and flavonoids—that aid in the reduction of metal ions and provide nanoparticle stability is the main objective. Comprehensive analysis of nanoparticle dimensions, characterisation techniques and biological activities, encompassing antibacterial, antioxidant, and anticancer effects, is presented. The paper also examines the obstacles and opportunities associated with scaling these green synthesis processes for industrial use. This review concentrates on specific plants to provide new insights into the sustainable synthesis of nanoparticles and their potential to enhance several domains of nanotechnology.