Chlorpyrifos is a broad-spectrum organophosphate pesticide widely used for agricultural and nonagricultural applications that can highly intervene and impact with the ecosystem and affects both biotic and abiotic components. Photocatalytic degradation process using nanoparticles and nanocomposites are more fascinating as they are rapid and e cient than the existing other degradation routes. In this study, Curcubita maxima leaves are used as a novel source for green synthesis of reduced graphene oxide -silver composite in a single pot. Characterization of the novel phyto source driven composite was performed by UV-visible spectroscopy, Fourier transform infrared analysis, X-ray diffraction analysis and eld emission scanning electron microscopic methods. The assessment of degradation effect of chlorpyrifos by the synthesized nanocomposite was performed. The photocatalytic activity of the composite was demonstrated through two different process as adsorption under room temperature and photocatalysis in the presence of sunlight. Different parameters such as pH, time, photocatalyst dose and pesticide concentration were optimized. The adsorption isotherms governing the photocatalytic adsorption process were investigated to predict the adsorption capacity of the synthesized nanocomposite. In addition, the results of antimicrobial activity of the nanocomposite against grampositive, gram-negative bacteria and antifungal activity were also been found to be highly promising to utilize this composite for the removal of microbial contaminations in wastewater treatment.

The progressive research into the nanoscale level upgrades the higher end modernized evolution with every field of science, engineering, and technology. Silver nanoparticles and their broader range of application from nanoelectronics to nano-drug delivery systems drive the futuristic direction of nanoengineering and technology in contemporary days. In this review, the green synthesis of silver nanoparticles is the cornerstone of interest over physical and chemical methods owing to its remarkable biocompatibility and idiosyncratic property engineering. The abundant primary and secondary plant metabolites collectively as multifarious phytochemicals which are more peculiar in the composition from root hair to aerial apex through various interspecies and intraspecies, capable of reduction, and capping with the synthesis of silver nanoparticles. Furthermore, the process by which intracellular, extracellular biological macromolecules of the microbiota reduce with the synthesis of silver nanoparticles from the precursor molecule is also discussed. Viruses are one of the predominant infectious agents that gets faster resistance to the antiviral therapies of traditional generations of medicine. We discuss the various stages of virus targeting of cells and viral target through drugs. Antiviral potential of silver nanoparticles against different classes and families of the past and their considerable candidate for up-to-the-minute need of complete addressing of the fulminant and opportunistic global pandemic of this millennium SARS-CoV2, illustrated through recent silver-based formulations under development and approval for countering the pandemic situation.

Chlorpyrifos is a broad-spectrum organophosphate pesticide widely used for agricultural and non-agricultural applications that can highly intervene and impact with the ecosystem and affects both biotic and abiotic components. Photocatalytic degradation process using nanoparticles and nanocomposites are more fascinating as they are rapid and efficient than the existing other degradation routes. In this study, Curcubita maxima leaves are used as a novel source for green synthesis of reduced graphene oxide - silver composite in a single pot. Characterization of the novel phyto source driven composite was performed by UV-visible spectroscopy, Fourier transform infrared analysis, X-ray diffraction analysis and field emission scanning electron microscopic methods. The assessment of degradation effect of chlorpyrifos by the synthesized nanocomposite was performed. The photocatalytic activity of the composite was demonstrated through two different process as adsorption under room temperature and photocatalysis in the presence of sunlight. Different parameters such as pH, time, photocatalyst dose and pesticide concentration were optimized. The adsorption isotherms governing the photocatalytic adsorption process were investigated to predict the adsorption capacity of the synthesized nanocomposite. In addition, the results of antimicrobial activity of the nanocomposite against gram-positive, gram-negative bacteria and antifungal activity were also been found to be highly promising to utilize this composite for the removal of microbial contaminations in wastewater treatment.