Articles

Zinc Oxide Nanoparticles: A Comprehensive Review on Synthesis and Properties

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Zinc oxide nanoparticles (ZnO-NPs) are inorganic metal oxides extensively utilized as preservatives in packaging materials and as potent antibacterial agents with minimal associated risks. The physicochemical properties of ZnO-NPs, including antibacterial efficacy, are significantly influenced by parameters such as particle size, morphology, concentration, and duration of interaction with bacterial cells. Beyond their antimicrobial applications, ZnO-NPs have garnered interest in diverse fields such as food technology, agriculture, cosmetology, and optoelectronics. Green synthesis of ZnO-NPs mediated by plant extracts has demonstrated enhanced antibacterial activity against various bacterial and fungal pathogens. Several plant species, including Trifolium, Justicia adhatoda, Physalis alkekengi L., Cassia auriculata, Aloe barbadensis, Pongamia pinnata, Limonia acidissima, Plectranthus amboinicus, Sedum alfredii Hance, and Aspidoterys cordata, have been identified as effective bioresources for nanoparticle fabrication. The resultant ZnO-NPs exhibit desirable physicochemical characteristics that are largely dependent on synthesis conditions, including particle size, shape, and concentration. This review comprehensively summarizes various green synthesis methodologies and characterization techniques for ZnO-NPs, highlighting their potential applications across the food, pharmaceutical, and textile industries.

Green Synthesis, Characterization and Applications of Nanoparticles Using Cow Urine, Cow Dung and Vermiwash: Review of Article

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Green synthesis has recently drawn significant interest as a viable, evolving, and environmentally friendly method for synthesis of variety of nanomaterials, including metal/metal oxide nanoparticles. In this review, we summed up the general protocols and mechanism of green synthesis and mechanism of green synthesis routes, especially for Silver(Ag), Silver oxide(Ag2O), Cadmium(Cd), Copper(Cu), Copper ferrite(CuFe2O4), Palladium(Pd), and Graphene nanomaterials/nanoparticles using cow urine[1] and Zinc oxide(ZnO), C dots and Amorphous Nano-silica and other nanoparticles using cow dung extract and Copper oxide, silver, gold, molybdenum doped TiO2 nanoparticles from vermiwash. We carefully examined the primary function of biological elements found in cow dung, cow urine and vermiwash. Vermiwash is the leachate that comes from vermicomposting units. Because it is a natural substance with brown colour and contains a lot of nutrients for plants, it can be used as liquid fertilizer. Additionally, the humic acid it contains aids in the growth of plants. In the solvent system, these basic biomolecules serve as stabilizing and reducing agents[2]. Characterization techniques are also used to discuss surface shape, phase development, and nanoparticle stability. Lastly, we talked about the potential applications of these synthesized nanoparticles as an anticancer agent, antimicrobial activity, photocatalyst and a drug delivery system.

Recent Advances in Ultrasound Assisted Synthesis of 2,4,5-Trisubstituted Imidazoles: A Comparative Study of Effective Catalytic Systems

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The imidazole moiety finds itself in a host of compounds having profound biological and medicinal properties. This has led to the quest to develop a cost effective, and desirably greener synthetic route to access this azole. In this review, ultrasonic irradiation assisted syntheses of trisubstitued imidazole derivatives have been discussed which make use of different environment friendly and efficient catalytic systems. They have been found to give excellent yield of product having high purity and with a shorter reaction time and has proved to be a viable alternative to traditional methods.