Green Synthesis of Silver Nanoparticles Using Medicinal Plants: A Sustainable Approach for Nanomedicine

Abstract

Nanotechnology has emerged as one of the most promising interdisciplinary fields with significant applications in medicine, biotechnology, agriculture, and environmental science. Among various nanomaterials, silver nanoparticles (AgNPs) have attracted considerable attention because of their unique physicochemical properties, including high surface area, antimicrobial activity, antioxidant potential, and biocompatibility. Conventional methods for synthesizing silver nanoparticles often involve hazardous chemicals, high energy consumption, and environmentally harmful by-products. Consequently, green synthesis has gained recognition as an eco-friendly and sustainable alternative for nanoparticle production. The present study explores the green synthesis of silver nanoparticles using medicinal plant extracts as reducing and stabilizing agents. Bioactive compounds such as flavonoids, phenolics, alkaloids, terpenoids, and proteins present in medicinal plants facilitate the reduction of silver ions into nanoparticles while simultaneously providing stability. This approach eliminates the need for toxic chemicals and promotes environmentally responsible nanomaterial production. Various medicinal plants, including Azadirachta indica (Neem), Ocimum sanctum (Tulsi), Aloe vera, and Moringa oleifera, have demonstrated remarkable efficiency in synthesizing biologically active silver nanoparticles. The synthesized AgNPs exhibit potent antimicrobial, antioxidant, anti-inflammatory, wound-healing, and anticancer properties, making them valuable candidates for nanomedicine applications. Characterization techniques such as UV–Visible spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR), Scanning Electron Microscopy (SEM), Transmission Electron Microscopy (TEM), and X-ray Diffraction (XRD) confirm nanoparticle formation, morphology, crystallinity, and stability. The study highlights the role of plant-mediated synthesis in producing nanoparticles with enhanced therapeutic efficacy and reduced environmental impact. The findings suggest that medicinal plant-based synthesis represents a sustainable, cost-effective, and scalable strategy for nanoparticle production. Green-synthesized silver nanoparticles offer immense potential for developing advanced drug delivery systems, antimicrobial coatings, biomedical devices, and targeted therapies. Therefore, integrating medicinal plant resources with nanotechnology can significantly contribute to the advancement of sustainable nanomedicine and environmentally friendly healthcare solutions.