Green synthesis, characterization, photocatalytic and antibacterial activities of copper oxide nanoparticles of copper oxide nanoparticles (original) (raw)
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2021
Rhizome extract of Bergenia ciliata was used as a bio-functional reducing material for green synthesis of copper oxide nanoparticles (CuO NPs). CuO NPs were characterized using ultra violet–visible spectroscopy (UV–vis), fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), dynamic light scattering (DLS), scanning electron microscopy (SEM) and energy-dispersive X-ray analysis (EDX). XRD analysis revealed the monoclinic phase of synthesized CuO NPs with average particle size of 20 nm. Spherical shaped nanoscale CuO particles were observed by EDX and SEM confirming the Cu and O presence in the synthesized nanoparticles. CuO nanoparticles showed antibacterial effects against all bacteria used in the study. The antioxidant effect was measured and IC50 values for ABTS, DPPH and FRAP assays were found to be 91.2, 72.4 and 109.0 µg/ mL− 1 respectively. Under sunlight, the CuO NPs reported extraordinary photocatalytic activity against methylene blue and methyl red degrada...
Journal of Industrial and Engineering Chemistry, 2015
The electrochemical method has been investigated for the synthesis of copper oxide nanoparticles (CuO NPs) under different reaction conditions. The CuO NPs were used as excellent photocatalyst for the degradation of different organic dyes under the illumination of sunlight irradiation. The highest degradation was 93% for methylene blue. The rate constant for MB, MR, and CR was found to be firstorder with values 0.02059, 0.02046, and 0.01749 min À1 , respectively. The antimicrobial efficiency of CuO NPs was investigated against bacterial strains (Escherichia coli and Staphylococcus aureus) and fungal strains (Aspergillus nigres and Candida albicans).
Journal of Nanomaterials
Methylene blue (MB) dye and Staphylococcus aureus (S. aureus) bacteria in wastewater are the two significant problems currently. Researchers have been looking for materials that can combat these two problems at the same time. In the present study, we describe the synthesis of spherical copper oxide (CuO) nanoparticles (NPs) by the chemical precipitation method and evaluate their photocatalytic performance against MB dye and antibacterial efficacy against S. aureus. CuO NPs were produced using copper acetate monohydrate (Cu(CH3COO)2·H2O) as the precursor and sodium hydroxide (NaOH) as the reducing agent. Synthesized CuO NPs were characterized using a combination of techniques, including ultraviolet–visible spectroscopy, X-ray diffraction, transmission electron microscopy, selected area electron diffraction, Fourier transform infrared, and energy-dispersive X-ray diffraction analysis. All the analyses indicated that monoclinic CuO NPs were formed with a spherical shape and an average ...
Green Approach for Synthesis of Cuo Nanoparticles and their Application in Antimicrobial Activity
International Journal of Environmental Sciences & Natural Resources, 2019
With the rapid development of nanotechnology, much has been anticipated with copper oxide nanoparticles (CuO NP) due to their extensive industrial and commercial application. Copper oxide (CuO) nanoparticles have attracted huge attention due to their catalytic, electrical, optical, photonic, textile, nanofluid, and antibacterial activity depending on the size, shape, and neighbouring medium. In the present paper, CuO nanoparticles are synthesized by using eco-friendly and non-toxic plants extract. The CuO nanoparticles are being synthesized by bottom up approach. CuO nanoparticles are used for various anti-bacterial treatments. Green plants extract is used for the efficient synthesis of CuO nanoparticles to obtain significantly active antibacterial material.
Applied Physics A, 2019
The nanostructured material, due to their outstanding applications in various fields of science and technology; metal and metal oxide nano are exclusively explored in the progress of nanosized materials. The transition metal oxides including CuO is are used for magnetic storage devices, solar energy applications, sensors, as a catalyst in reactions, as electrode materials in supercapacitors and to tune the semiconducting properties of materials. The current work focuses on the synthesis of CuO nanoparticles (NPs) by combustion technique for various annealing (100°C and 300°C) using ascorbic acid as a capping agent. The XRD pattern confirms that the CuO NPs exhibit the monoclinic structure. The optical properties are investigated using UV-Vis absorption spectra. Further, the refractive index, optical dielectric constant and bulk modulus were investigated using the specific empirical model as a function of temperature. The FTIR spectrum shows that the band in the range 450-500 cm −1 confirms the formation of CuO NPs. The SEM images revealed that the spherical surface morphology of the CuO NPs. The Elemental analysis and the particle size were confirmed by elemental dispersive X-ray analysis (EDX) and particle size analyzer. Moreover, the antibacterial activity of CuO nanoparticles was investigated using E. coli, S. typhi, M. luteus, P. fluorescent, S. flexneri, and V. cholera bacteria.
We report the synthesis of copper oxide (CuO) nanoparticles by simple chemical precipitation route using the copper acetate precursor. The synthesized CuO nanoparticles were characterized by X-ray powder diffraction (XRD), the synthesized particles were spherical and particle size was in the range of 24 nm. The Fourier-transform infrared (FTIR) results showed the functional groups required for the reduction of copper ions. UV-DRS is reported from the synthesis CuO nanoparticles and optical results show the bandgap energy (E g) is 1.94 eV. The photoluminescence spectrum display a broad emission at 527 nm indicates green emission. The morphology of the product was analyzed by field emission scanning electron microscopy (FE-SEM) and confirmed by high resolution transmission electron microscope (HR-TEM) analysis. The magnetic measurements indicated that the obtained CuO nanostructures are found to be room temperature ferromagnetism (RTF). The results reveal that B. subtilis shows the maximum inhibition up to 10 mm of the synthesized CuO product.
springer, 2023
The green approach to the synthesis of metal oxide is an alternative to conventional methods in its ability to be facile, less expensive, time-consuming, non-toxic, and suited for large-scale manufacturing. The proposed approach for the synthesis of CuO nanoparticles (NPs) was employed as a reducing agent for an extract comprising various plant parts, including flower, leaf, and peel extracts of Caesalpinia pulcherrima, Nervilia aragoana, and Manihot esculenta. The sesquiterpenoids demonstrated that two molecules of cubebene were sufficient to reduce Cu 2+ ions to monoclinic CuO NPs which were investigated by UV-Vis, Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDX), transmission electron microscopy (TEM), and X-ray diffraction. CuO NPs were used in flower, leaf, and peel extracts and they degraded at 96%, 72%, and 78% respectively. The degradation rate of CuO NPs kinetics were also calculated against the MB dye. The antimicrobial activity of CuO NPs exhibited the highest activity against Candida albicans microbe. Using the agar well diffusion method, the synthesized CuO NPs were shown to have antibacterial action against human pathogenic Escherichia coli and S. aureus bacteria. Gram-positive bacteria of S. aureus, as opposed to Gram-negative bacteria of E. coli, were more susceptible to the potential bactericidal activity of biologically produced CuO NPs.
Synthesis, Characterization, and Antimicrobial Activity of Copper Oxide Nanoparticles
Journal of Nanomaterials, 2014
We studied the structural and antimicrobial properties of copper oxide nanoparticles (CuO NPs) synthesized by a very simple precipitation technique. Copper (II) acetate was used as a precursor and sodium hydroxide as a reducing agent. X-ray diffraction patter (XRD) pattern showed the crystalline nature of CuO NPs. Field emission scanning electron microscope (FESEM) and field emission transmission electron microscope (FETEM) demonstrated the morphology of CuO NPs. The average diameter of CuO NPs calculated by TEM and XRD was around 23 nm. Energy dispersive X-ray spectroscopy (EDS) spectrum and XRD pattern suggested that prepared CuO NPs were highly pure. CuO NPs showed excellent antimicrobial activity against various bacterial strains (Escherichia coli,Pseudomonas aeruginosa,Klebsiella pneumonia,Enterococcus faecalis,Shigella flexneri,Salmonella typhimurium,Proteus vulgaris,andStaphylococcus aureus). Moreover,E. coliandE. faecalisexhibited the highest sensitivity to CuO NPs whileK. p...
International Research Journal of Pharmacy, 2017
Copper oxide (CuO) nanoparticles are known as multifunctional inorganic nanoparticles with a wide range of applications. This work mainly concentrated on the comparative study of antibacterial properties of CuO nanoparticles using two different methods. The green CuO nanoparticles were synthesized from Cajanus Cajan plant leaf extract. The CuO nanoparticles were visually confirmed by the change of color after addition of leaf extract into the copper acetate solution. The synthesized CuO nanoparticles were also characterized by using UV-Vis analysis, Fourier Transform Infrared analysis (FTIR), and X-ray diffraction analysis (XRD), Field Emission Scanning Electron Microscopy (FESEM) Energy Dispersive X-Ray (EDX) analysis. From the results, it is suggested that bio-CuO nanoparticles show more enhanced biocide activity against various human pathogens when compared to chemical CuO nanoparticles.
Synthesis, Characterization and Antibacterial Activity of Cuo Nanoparticles
International Journal of Applied Pharmaceutics, 2019
Objective: The present study was done to see the effect of biologically synthesized CuO-NPs (Copperoxide nanoparticles) on the growth of bacterial strains. Methods: Physico-chemical characterization of CuO-NPs was done by UV-Vis-spectrophotometer, XRD, FE-SEM, and EDS. The disc plate diffusion assay was used to evaluate the anti-bacterial effect of CuNPs. Results: This study has shown a promising anti-bacterial activity of biosynthesized CuO-NPs at different concentrations ranging from 10 to 100 µg/ml against Escherichia coli and Staphylococcus aureus bacteria. Conclusion: Nanoparticles (NPs) are small size particles between range 1 to 100 nm which expand their physical and chemical properties due to high surface area. The present study reveals that there may be possible utilization of biosynthesized CuO NPs for the treatment of bacterial infectious disease in near future.