Bio-mimetic synthesis of catalytically active nano-silver using Bos taurus (A-2) urine

Abstract

Herein we have synthesized silver nanoparticles (Ag NPs) using liquid metabolic waste of Bos taurus (A-2 type) urine. Various bio-molecules present in cow urine, are effectively used to reduce silver (Ag) ions into silver nanoparticles in one step. This is bio-inspired electron transfer to Ag ion for the formation of base Ag metal and is fairly prompt and facile. These nanoparticles act as a positive catalyst for various organic transformation reactions. The structural, morphological, and optical properties of the as-synthesized Ag NPs are widely characterized by X-ray diffraction spectroscopy, ultraviolet–visible spectroscopy, scanning electron microscope, Fourier transmission infra-red spectroscopy, and atomic force microscopy. The as-synthesized bio-mimetic Ag NPs show potential activity for several reduction reactions of nitro groups. The Ag NPs were also used for degradation of hazardous dyes such as Methylene blue and Crystal violet with good degradation rate constant.

Bos taurus (A-2) urine assisted bioactive cobalt oxide anchored ZnO: a novel nanoscale approach

“…The literature survey reveals that the liquid metabolic waste of Bos taurus indicus (A-2) contains urea, creatinine, aurum hydroxide, carbolic acid, phenol, calcium, and magnesium 6 , 12 , 17 . After photoactivation, a few biogenic volatile inorganics and organic compounds like CO 2 , NH 3 , CH 4, methanol, propanol, acetone, and some secondary nitrogenous products are also formed.…”

“…Then, after extensive research took place in the domain of nanoscience and technology. In today’s world nanoscience and technology touches to diverse areas like electrochemical application 1 , sensors 2 , photocatalysis 3 , electronics 4 , Nano-catalyst in organic transformation reactions 5 , 6 , medical diagnosis 7 , cosmetics 8 , textile 9 , veterinary sciences 10 and are becoming more attractive as novel uses, from medical diagnostics to gene therapy vehicles, drug delivery etc.…”

“…The antimicrobial property of Indian cow urine has been successfully examined in modern microbiological laboratories and observed to be really effective and as par with modern antibiotics 12 . According to laboratory examination, cow urine includes minerals such as iron, copper, nitrogen, manganese, silicon, magnesium, calcium salts, mineral salts, enzymes, and vitamins such as A, B, C, D, E, uric acid, and other hormones 6 . According to ancient Ayurvedic literature, cow urine can heal leprosy, peptic ulcers, liver illnesses, renal disorders, asthma, psoriasis, anemia, some types of allergies, abdominal distension due to accumulation of gases and cancer.…”

“…Thus, our research group has synthesized various transition metal and metal oxide NPs like cadmium oxide 13 , palladium 14 , copper oxide 15 , gold and silver 6 using Indian cow urine. These nanoparticles, which were synthesized using Indian cow urine, have potent biological and catalytic effectiveness.…”

Opto-Structural Characteristics and Biomedical Applications of Microwave Irradiated Green Synthesised AM-Agnp from Atalantia Monophylla (L.) Leaf Extract

“…Nature's abundant template for the green synthesis of novel metal nanoparticles [1] , in the form of biologically active plant's secondary metabolites contribute a variety of reducing and capping agents for the synthesis of eco-friendly, cost-effective and tuneable metal nanoparticles. Besides plant extract, cow urine, used as a waste utilisation technique in the synthesis of active Palladium, CuO, Silver and Gold nanoparticles to abate fatal bacterial diseases and degrade the water contaminants has gained scientific attention as bio-waste management concept [2,3,4,5] . Small size and large surface area to volume ratio of the metal nanoparticles exhibited novel idiosyncrasy [6] compared to the big particle of bulk materials [7] .…”