Carbon-based materials impregnated with silver nanoparticle synthesized by gamma irradiation for ethylene gas scavenger application

This study explores the potential of carbon-based materials impregnated with silver nanoparticles, synthesized via gamma irradiation, as ethylene scavengers to address the challenges in post-harvest management of climacteric fruits. Ethylene, an essential plant hormone, significantly impacts fruit ripening and shelf life, necessitating effective management strategies. The research focuses on synthesizing silver nanoparticles at various concentrations (0, 4, 8, and 12 %) and their impregnation onto activated carbon (AC), designated as AC0AG, AC4AG, AC8AG, and AC12AG. These materials underwent comprehensive characterization through scanning electron microscopy (SEM) coupled with energy-dispersive X-ray Spectrometry (EDS) and transmission electron microscopy (TEM). In addition, silver nanoparticles at various concentrations (0, 4, 8, and 12%) in colloidal form designated as 0AG, 4AG, 8AG, and 12AG were characterized through UV-VIS spectroscopy and dynamic light scattering (DLS). The study's findings reveal that AC12AG (AC powder form) demonstrates the most effective ethylene scavenging capability, with a clear inverse correlation between the efficacy and the concentration of AgNO3. 3 . Further, the application of these materials in delaying the ripening process and reducing the incidence of pathogens and fungi in tomatoes was evaluated, showing significant efficacy. This research not only elucidates the critical role of silver nanoparticles in enhancing the ethylene scavenging capacity of carbon- based materials but also offers a scientifically grounded approach for improving the shelf life and quality of climacteric fruits, thus contributing a valuable solution to the post-harvest management of agricultural produce.