In this study, we are reporting biogenic synthesis of silver nanoparticles and hydrothermal synthesis of zinc oxide nanoparticles. Using convenient mechanical milling methods, nanocomposites with superior photocatalytic and catalytic properties are synthesized. Herein, we have adopted a green, eco-friendly, and economical route for the synthesis of Ag nanoparticles using Zingiber officinalae rhizome extract in an aqueous solution. The synthesized materials were characterized using UV–Vis spectroscopy, XRD, SEM & FE-SEM, FT-IR, Raman, and a particle size analyzer with zeta potential analysis. The photocatalytic activities of Ag, ZnO and their composites were studied by observing the degradation of methylene blue and crystal violet dyes under natural sunlight. Then the catalytic efficacies of synthesized nanoparticles for various organic transformation reactions were studied. Ag–ZnO nanocomposites were predicted to have improved photocatalytic activity and organic transformation reactions, allowing them to be used in environmental remediation applications.
In this study, a novel synthetic method for cobalt oxide (Co3O4) nanoparticles using Bos taurus (A-2) urine as a reducing agent was developed. In addition to this ZnO nanorods were produced hydrothermally and a nanocomposite is formed through a solid-state reaction. The synthesized materials were characterized through modern characterization techniques such as XRD, FE-SEM with EDS, DLS, zeta potential, FT-IR, Raman spectroscopic analysis, and TGA with DSC. The free radical destructive activity was determined using two different methods viz. ABTS and DPPH. The potential for BSA denaturation in vitro, which is measured in comparison to heat-induced denaturation of egg albumin and results in anti-inflammatory effects of nanomaterial was studied. All synthesized nanomaterials have excellent antibacterial properties, particularly against Salmonella typhi and Staphylococcus aureus. The composite exhibits excellent antioxidant and anti-inflammatory activities in comparison to pure nanomaterials. This reveals that these nanomaterials are advantageous in medicine and drug administration.
In order to effectively purify drinking water or wastewater, harmful organic contaminants like nitroarenes must be removed from water systems. In this context, the present study developed a unique bio-mimetic, in-situ synthesis of Ag/rGO nanocomposite. We employed Bos taurus indicus urine to make Ag/rGO nanocomposite in an environmentally friendly, economical, and sustainable manner. Through the use of DLS, FE-SEM, FT-IR, Raman, TGA-DSC, XRD, and Zeta Potential analysis, the morphological, elemental, and structural characterization were completed. Investigations were conducted into the catalytic effectiveness of prepared nanomaterials for diverse nitroarenes reduction. Then, using NaBH4 at 25oC, the catalytic roles of Ag and Ag/rGO nanocatalyst were assessed towards the catalytic reduction of several environmental pollutants such as 2,3 & 4-nitroaniline and 4-nitrophenol. For their catalytic performance, bio-mimetically synthesized Ag NPs were thermally treated at 200°C and compared to Ag/rGO nanocomposite. The antibacterial and antioxidant properties of as-prepared nanomaterials were investigated in this study. The finding signifies the importance of such nanocomposites in medicinal chemistry and antibacterial creams for external use.
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