Copper Oxide Nanoparticles

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Biosynthesis, Characterization and Photocatalytic Activity of Copper/Copper Oxide Nanoparticles Produced Using Aqueous Extract of Lemongrass Leaf

Biosynthesis, Characterization and Photocatalytic Activity of Copper/Copper Oxide Nanoparticles Produced Using Aqueous Extract of Lemongrass Leaf

Among the various metal/metal oxide nanoparticles, copper and copper oxide nanoparticles have wide applications as heat transfer systems, antimicrobial materials, gas sensors, catalysts, high temperature superconductors and solar cells [1-4]. The Cu and CuO nanoparticles can be synthesized by different methods such as vapor deposition, electrochemical reduction, solvothermal, sol-gel technique and chemical reduction of copper salts, but these methods are costly, high energy requirement and especially the use of toxic compounds limits their application [5, 6]. Hence the development of a reliable and environmental friendly biosynthesis approach for the synthesis of copper and copper oxide nanoparticles is important because of its eco-friendly products [7-31].
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BIOSYNTHESIS OF COPPER OXIDE NANOPARTICLES USING CYANOBACTERIA SPIRULINA PLATENSIS AND ITS ANTIBACTERIAL ACTIVITY

BIOSYNTHESIS OF COPPER OXIDE NANOPARTICLES USING CYANOBACTERIA SPIRULINA PLATENSIS AND ITS ANTIBACTERIAL ACTIVITY

ABSTRACT: Recently, biological synthesis of nanoparticles (NPs) has attracted attention because of the need to develop new cost-effective and efficient synthesis protocol. In this paper, we account for the use of cell-free extract of Spirulina platensis in the biosynthesis of copper oxide nanoparticles (CuO NPs) of dimensions 30 - 40 nm. The biosynthesised CuO NPs were confirmed visually by appearance of dark brown colour formation in mixture and surface plasmon resonance band observed at 259 nm by using UV-Visible Spectroscopy. The size and morphology of the nanoparticles were confirmed by scanning electron microscopy (SEM) and transmission electron microscopy (TEM) analysis. Furthermore, these NPs were found to exhibit high antibacterial activity against pathogenic gram-negative i.e. Escherichia coli - MTCC-9721, Proteus vulgaris - MTCC-7299, Klebsiella pneumonia - MTCC-9751 and gram- positive i.e. Staphylococcus aureus - MTCC-9542, S. epidermidid -MTCC- 2639, Bacillus cereus - MTCC-9017 bacteria. The CuO NPs had shown maximum zone of inhibition (ZOI) i.e. 28.0 ± 0.41 mm in P. vulgaris .
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Preparation and Characterization of Copper Oxide Nanoparticles Synthesized via Chemical Precipitation Method

Preparation and Characterization of Copper Oxide Nanoparticles Synthesized via Chemical Precipitation Method

The copper oxide nanoparticles (CuO-NPs) possess a wide range of applications. Compared with ordinary copper oxide powder, the nano particles of copper oxide show superior catalytic activity and selectivity. It has excellent antimicrobial activity against various bacterial strains [2]. The CuO-NPs are using in removal of dyes [3], nanoparticulate film fabrications [4], gas sensors [5], semiconductors [6], organic catalysis [7], solar energy transformation [8], and many more. The CuO-NPs also have an application in heat transfer. Thermal conductiv- ity of CuO based nanofluid is 12.4% higher in comparison with deionised water [9]. The CuO-CeO 2 nanocom-
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Copper oxide nanoparticles catalyzed direct N alkylation of amines with alcohols

Copper oxide nanoparticles catalyzed direct N alkylation of amines with alcohols

Recently, organic reactions catalyzed by metal/metal oxide nanoparticles has attracted much attention. The notable advantages of this novel family of heterogeneous catalysts, such as high catalytic activity, good recyclability and improved selectivity, extend to a wide-range of applications in various organic reactions.[11] Recently, copper oxide nanoparticles (CuO NPs) has been employed as a heterogeneous catalyst for various organic transformations.[12] This inspired us to focus on the aspect of CuO NPs catalysis for the N-alkylation of amines using primary alcohols.
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Fabrication of Antimicrobial Textiles Using Hydrothermally Synthesized Copper Oxide Nanoparticles

Fabrication of Antimicrobial Textiles Using Hydrothermally Synthesized Copper Oxide Nanoparticles

Four different concentrations (0.5%, 1%, 1.5%, and 2%) of prepared copper oxide nanoparticles were dispersed in 0.5% of acrylic binder solution along with 0.5% Lissapol-N.The fabric was dried at 100°Cfor 4mins to remove the moisture content. The dried fabric (10cm×10cm) samples were soaked in different concentrations of prepared nanoparticles dispersion for 30 minutes then the samples were squeezed to remove excess solution using padding mangle running at the speed of 20 rpm and with Pressure of 1.0 kg/cm -2 . Then the samples were air dried and cured for 4 minutes at 120°C.
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Electrochemical Synthesis, Characterization and Evaluation of Antioxidant Activity of Copper Oxide Nanoparticles

Electrochemical Synthesis, Characterization and Evaluation of Antioxidant Activity of Copper Oxide Nanoparticles

ray diffraction of copper oxide nanoparticles: Stable long ucture with crystal size ~5nm have been prepared by electrochemical reduction method. The crystallinity and crystal phase of synthesized CuO NPs were examined by XRD shown in Figure-1. The peaks in the XRD parttern can be assigned to the typical monoclinic tenorite structure, single phase CuO (space group C2/c, JCPDS card no. 1021). These synthesized CuO NPs are of high purity because impurities are absent as indicated by XRD. The small size of nanoprticles can be easily detected from broadening of CuO NPs is found to be 4.68 nm Scherrer’s equation 37 .
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Effects of copper oxide nanoparticles on developing zebrafish embryos and larvae

Effects of copper oxide nanoparticles on developing zebrafish embryos and larvae

Abstract: Copper oxide nanoparticles (CuO NPs) are used for a variety of purposes in a wide range of commercially available products. Some CuO NPs probably end up in the aquatic systems, thus raising concerns about aqueous exposure toxicity, and the impact of CuO NPs on liver development and neuronal differentiation remains unclear. In this study, particles were characterized using Fourier transform infrared spectra, scanning electron microscopy, and transmission electron microscopy. Zebrafish embryos were continuously exposed to CuO NPs from 4 hours postfertilization at concentrations of 50, 25, 12.5, 6.25, or 1 mg/L. The expression of gstp1 and cyp1a was examined by quantitative reverse transcription polymerase chain reaction. The expression of tumor necrosis factor alpha and superoxide dismutase 1 was examined by quantitative reverse transcription polymerase chain reaction and Western blotting. Liver development and retinal neurodifferentiation were analyzed by whole-mount in situ hybridization, hematoxylin–eosin staining, and immunohistochemistry, and a behavioral test was performed to track the movement of larvae. We show that exposure of CuO NPs at low doses has little effect on embryonic development. However, exposure to CuO NPs at con- centrations of 12.5 mg/L or higher leads to abnormal phenotypes and induces an inflammatory response in a dose-dependent pattern. Moreover, exposure to CuO NPs at high doses results in an underdeveloped liver and a delay in retinal neurodifferentiation accompanied by reduced locomotor ability. Our data demonstrate that short-term exposure to CuO NPs at high doses shows hepatotoxicity and neurotoxicity in zebrafish embryos and larvae.
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GREEN SYNTHESIS OF COPPER OXIDE NANOPARTICLES AND ITS APPLICATIONS

GREEN SYNTHESIS OF COPPER OXIDE NANOPARTICLES AND ITS APPLICATIONS

10 mL of the plant leaf extract was added to 10 mL of Fehling’s solution (5 mL of Fehling’s A and 5ml of Fehling’s B). After 10 minutes, the colour of the solution changed from blue to brick red, indicating the formation of Cuprous Oxide nanoparticles, which was then washed thoroughly with distilled water and then calcined at 52-60 °C. It is then heated at 500 °C for 3 hours in a muffle furnace. The colour of the product thus obtained is black in colour indicating the formation of copper oxide nanoparticles .
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The Optical Properties of Copper Oxide Nanoparticles with (Polyvinyl Alcohol Polyethylene Glycol) Blend

The Optical Properties of Copper Oxide Nanoparticles with (Polyvinyl Alcohol Polyethylene Glycol) Blend

The optical constants and optical energy gap of (PVA-PEG-CuO) nano-composite films have been studied in the present paper. The nano-composite films was prepared by casting technicality, where, (PVA-PEG) blends used as matrix while the Copper oxide nanoparticles were (0, 2, 4, 6, 8) wt% as a filler. The present study is aimed to modification of the optical properties of blends with different concentrations of (CuO) nanoparticles and for achieves a new class of material. The absorption and transmission spectra have been recorded at the wavelength range 220-800 nm. The experimental results illustrate that the absorbance of pure blend was increased with increase of Copper oxide concentrations and vice versa with transmission. On the other hand, the optical constants and optical energy gap were changed with the addition of Copper oxide nanoparticles concentrations.
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<p>Biosynthesis of Copper Oxide Nanoparticles with Potential Biomedical Applications</p>

<p>Biosynthesis of Copper Oxide Nanoparticles with Potential Biomedical Applications</p>

Materials and Methods: In this study, we aim to synthesis the copper oxide nanoparticles using Achillea millefolium leaf extracts for the fi rst time. Catalytic activity was investigated by in situ azide alkyne cycloaddition click and also A 3 coupling reaction, and optimized in terms of temperature, solvent, and time of the reaction. Furthermore, the photocatalytic activity of the synthesized nanoparticles was screened in terms of degradation methylene blue dye. Biological activity of the synthesized nanoparticles was evaluated in terms of antibacterial and anti-fungal assessments against Staphylococcus aureus, M. tuberculosis, E. coli, K. pneumoniae, P. mirabili, C. diphtheriae and S. pyogenes bacteria ’ s and G. albicans, A. fl avus, M. canis and G. glabrata fungus. In the next step, the biosynthesized CuO-NPs were screened by MTT and NTU assays. Results: Based on our knowledge, this is a comprehensive study on the catalytic and biological activity of copper oxide nanoparticles synthesizing from Achillea millefolium, which presents great and signi fi cant results (in both catalytic and biological activities) based on a simple and green procedure.
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PHYSICO CHEMICAL AND BIOLOGICAL ACTIVITIES OF CARICA PAPAYA PEEL EXTRACT MEDIATED BIOSYNTHESIS OF COPPER OXIDE NANOPARTICLES

PHYSICO CHEMICAL AND BIOLOGICAL ACTIVITIES OF CARICA PAPAYA PEEL EXTRACT MEDIATED BIOSYNTHESIS OF COPPER OXIDE NANOPARTICLES

Among the various nanoparticles, copper and copper-oxide nanoparticles are in particular attractive owing their unique physical and chemical properties and good biological properties like antimicrobial, antioxidant and larvicidal activity. [3,4] Copper nanoparticles have great applications as heat transfer systems, [5] antimicrobials, [6] superstrong materials, sensors [7] and catalysts. [8] CuO nanoparticles can be used in paint or plaster as a bactericide agent to coat hospital equipment further it is also used for the crop protection and agriculture, food packing microbial loads and medicine. Based on this backdrop, the present research work deals the synthesis of CuO nanoparticles using Carica Papaya peel extract.
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Physical, structural and optical properties of erbium doped tellurite glass with copper oxide nanoparticles embedment

Physical, structural and optical properties of erbium doped tellurite glass with copper oxide nanoparticles embedment

quenching technique. The physical properties are measured in terms of glass density, ionic packing density and molar volume while the glass hardness is determined by using Vickers Microhardness. The amorphous nature of the glass is determined by X-ray Diffractometer (XRD). The occurrence of copper oxide nanoparticles (CuO NPs) is verified by using High-Resolution Transmission Electron Microscopy (HRTEM). The structural and optical properties are characterized by using Fourier Transform Infrared (FTIR), UV-Visible-NIR spectrophotometer and Photoluminescence (PL) spectrometer, respectively. The glass density, molar volume, ionic packing density and hardness are found in the range of (4.799 – 4.951) g cm -3 , (26.575 – 27.202) cm 3 mol -1 , (0.457 – 0.467) and (235 – 349), respectively. It is found that all glasses are amorphous in nature while the presence of CuO NPs with lattice spacing 0.23 nm at (111) plane is verified by HRTEM analysis. FTIR spectrum exhibited three major bands which are attributed to Te – O – Te, TeO 4 and
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Solvent free green Synthesis of 5-arylidine Barbituric acid Derivatives Catalyzed by Copper oxide Nanoparticles

Solvent free green Synthesis of 5-arylidine Barbituric acid Derivatives Catalyzed by Copper oxide Nanoparticles

The AR grade tetra propyl ammonium bromide (TPAB), tetrahydrofuran (THF) and acetonitrile (ACN) were purchased from Aldrich and S.D. Fine chemicals and used as such. The sacrificial anode in the form of copper sheet and platinum sheet as inert cathode having thickness 0.25 mm and purity 99.9% was purchased from Alfa Asaer. The specially designed electrolysis cell with a volume capacity of 30 ml was used. The prepared copper oxide nanoparticles were characterized by UV- Visible, XRD, SEM-EDS techniques. The UV-Visible studies were recorded [JASCO 503] spectrophotometer using a quartz cuvette with ACN / THF (4:1) as reference solvent. The X-ray powder diffraction patterns of the copper oxide nanoparticles were recorded on Bruker 8D advance X-ray diffractometer using CuK α radiation of wavelength = 1.54056 Å. To study the morphology and elemental composition in copper oxide nanoparticles were examined using energy dispersive spectrophotometer (EDS), the SEM analysis were carried out with JEOL; JSM- 6330 LA operated at 20.0kV and 1.0000nA.
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Effect of waterborne copper oxide nanoparticles and copper ions on guppy (Poecilia reticulata): Bioaccumulation and histopathology

Effect of waterborne copper oxide nanoparticles and copper ions on guppy (Poecilia reticulata): Bioaccumulation and histopathology

that waterborne exposure to soluble Cu can induce endocrine disruption and affect metabolic rates, 3,4 oxidation stress, cell apoptosis, immune responses, 5 swimming behavior, 6 histopathology, 4,7 growth parameters, digestive enzymes, and body composition. 7 In recent decades, copper oxide nanoparticles (CuO-NPs) have found a wide spectrum of applications such as gas sensors, 8

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Copper Oxide Nanoparticles : Synthesis and Characterization

Copper Oxide Nanoparticles : Synthesis and Characterization

precipitation method. Characterization was done by X-ray diffraction (XRD) analysis, scanning electron microscopy (SEM), particle size analyzer and Fourier transform infra-red spectroscopy (FTIR). Two most prominent peaks in XRD profile, around 2  = 35.9° and 39.2°, which are combinations of double-reflections {(002) and (-111)} and {(111) and (200)}, respectively, are characteristics of monoclinic CuO. Unit cell parameters determined through Reitveld analysis of XRD data under FullProf Software Suite were: a = 4.6927, b = 3.4283 and c = 5.137 Å, with  =  = 90° and  = 99.546° for monoclinic Cc space group. Moreover, crystallite size estimation from XRD data using Debye-Scherrer formula produced average size of 34 nm for the nanoparticles. However, the particle size analyzer measured the average grain-size as 86 nm. Therefore, it was concluded that each grain of the nano-sized CuO seemed to be made up of roughly 16 crystallites. SEM pictures showed uniform distribution of ice-glass like crystalline particles, which are agglomeration of smaller particles. FTIR results showed expected peaks corresponding to Cu-O stretching. As a potential application as carbon paste electrode (CPE) modifier, the electrocatalytic efficiencies of CuO nanoparticles are being investigated. Keywords: Copper oxide; Nanoparticles; Wet chemical precipitation; X-ray diffraction
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Copper and Copper Oxide Nanoparticles : Applications in Catalysis

Copper and Copper Oxide Nanoparticles : Applications in Catalysis

Copper and Copper oxide nanoparticles (Cu NPs) have attracted considerable interest because of their catalytic, optical, mechanical and electrical conducting properties. The earth-abundant and inexpensive copper metal, have generated a great deal of interest specially in the field of catalysis. This paper discusses the uses of Cu and Cu-oxide NPs as catalysts for Ullmann type reactions and Gas Phase Reactions. We believe that this article will provide the necessary background information for further study and applications of Cu-based nanoparticles in catalysis.
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(Zn,H) codoped copper oxide nanoparticles via pulsed laser ablation on Cu Zn alloy in water

(Zn,H) codoped copper oxide nanoparticles via pulsed laser ablation on Cu Zn alloy in water

Here, PLA on Cu-Zn alloy rather than on pure Cu in water was used to fabricate (Zn,H)-codoped copper oxide nanoparticles and to study the phase behavior as well as optical property change of the colloidal solution upon dwelling in water. We focused on (1) competitive oxidation of Cu vs. Zn against the standard Galvanic cell having copper as the cathode and zinc as the anode, and hence phase selection in the dynamic PLA process in water; (2) (Zn,H) signature and optical properties of the as-fabricated copper oxides in amorphous state and high-pressure-favored cuprite structure; and (3) water dwelling-induced tenorite which assembled as rice-like domains with (Zn,H) signature, preferred orientations, planar defect, and yellowish color indicating a significant bandgap narrowing for potential photocatalytic applications.
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Antifungal Effect of Copper and Copper Oxide Nanoparticles Against Penicillium on Orange Fruit

Antifungal Effect of Copper and Copper Oxide Nanoparticles Against Penicillium on Orange Fruit

Mold green and blue are most important disease of Citrus fruits after crop that it is created by fungus Penicillium italicum and Penicillium digitatum. In this study, copper and copper oxide nanoparticles synthesized by chemical reduction and precipitation methods and characterized by X-ray diffraction, FTIR, SEM and TEM. Also, the anti-fungal properties of synthesized nanoparticles were tasted against Penicillium on Orange fruit by Disc-Diffusion method. The antifungal properties of nanoparticles were studied by the effect of different concentrations of nanoparticles. The results show that anti-fungal properties also increased by increasing the concentration of nanoparticles to 15%.
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Antimicrobial Effect of Copper Oxide Nanoparticles on Some Oral Bacteria and Candida Species

Antimicrobial Effect of Copper Oxide Nanoparticles on Some Oral Bacteria and Candida Species

Ionic nanopariculate metal oxides are among the potentially interesting antimicrobial agents, because of their extremely high surface areas and having unusual crystalline structures with high number of edges and corners and other reactive sites [16]. Copper oxide nanoparticle (CuO NP) is the simplest member of the Cu compounds that reveal a range of potential physical properties and is much cheaper than silver oxide. It can be mixed easily with polymers to provide the composites with unique physio-chemi- cal properties. Also, these nanoparticles have high surface areas and unusual crystalline structures to give CuO NPs with antimicrobial activity that is dose
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Rapid Sonochemical Synthesis and Characterisation of Copper Oxide Nanoparticles from Schweizer's Reagent

Rapid Sonochemical Synthesis and Characterisation of Copper Oxide Nanoparticles from Schweizer's Reagent

In the present paper, we report the synthesis of copper oxide nanostructures via a sonochemical technique that uses ultrasound irradiation as the driving mechanism in the process for Schweizer's reagent using ammonia as a base. The copper oxide nanostructures formed were subsequently investigated using advanced characterisation techniques such as X-ray diffraction (XRD) analysis to confirm the presence and type of copper oxides present, scanning electron microscopy (SEM) to determine particle size and morphology and UV- visible spectroscopy and Fourier Transform Infrared Spectroscopy (FT-IR) were used to monitor the formation of the nanostructures.
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