Structural and optical studies of copper oxide nanoparticles synthesized by chemical precipitation method

Objective: To determine antimicrobial efficacy of copper oxide nanoparticles (CuO NPs) against Streptococcus sp. and Staphylococcus sp. Methods: CuO NPs were synthesized using chemical precipitation method. The reducing agent, 0.1 M NaOH, was used along with 100 mM CuSO4 precursor for the synthesis of CuO NPs. The characterization of CuO NPs was done by ultraviolet-visible spectroscopy and scanning electron microscopy (SEM) to study optical and morphological characteristics, correspondingly. The identification of bacterial cultures was done through microscopic and biochemical studies. Antibacterial efficacy of CuO NPs was determined against Streptococcus sp. and Staphylococcus sp. by qualitative and quantitative methods through anti-well diffusion assay and broth dilution method, respectively. Results: The absorption spectrum and band gap were found to be at 260 nm and 4.77 eV, respectively. The SEM image of CuO NPs shows cluster of nanostructures having width of individual clusters in the range of 100 nm–500 nm. CuO NPs showed inhibition at a concentration ranging from 60 μg/mL to 1000 μg/mL. Conclusion: Finally, CuO NPs can be used as effective antibacterial agent against Streptococcus sp. and Staphylococcus sp. and may have applications in medical microbiology.

Download Full-text

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

OALib ◽

10.4236/oalib.1101409 ◽

2015 ◽

Vol 02 (03) ◽

pp. 1-8 ◽

Cited By ~ 14

Author(s):

Ismat Zerin Luna ◽

Lutfun Naher Hilary ◽

A. M. Sarwaruddin Chowdhury ◽

M. A. Gafur ◽

Nuruzzaman Khan ◽

...

Keyword(s):

Copper Oxide ◽

Chemical Precipitation ◽

Copper Oxide Nanoparticles ◽

Chemical Precipitation Method ◽

Precipitation Method ◽

Oxide Nanoparticles

Download Full-text

Synthesis and characterization of zinc doped copper oxide nanocrystals by chemical precipitation method

Nanoscale Reports ◽

10.26524/nr.3.15 ◽

2020 ◽

Vol 3 (2) ◽

Author(s):

Aarthe K G ◽

Sowmiya V

Keyword(s):

Copper Oxide ◽

Copper Acetate ◽

Morphological Structure ◽

Visible Spectrum ◽

Chemical Precipitation ◽

Copper Oxide Nanoparticles ◽

Chemical Precipitation Method ◽

Precipitation Method ◽

X Ray Diffraction ◽

X Ray

Zinc doped copper oxide nanoparticles were synthesized by chemical precipitation method. Copper acetate is act as a precursor and sodium hydroxide will act as a reducing agent. The prepared nanoparticles were characterized by X-ray diffraction (XRD) which reveals the simple monoclinic structure. The Fourier Transform Infrared Spectroscopy confirms the functional groups present in the nano powders. The morphological Structure of the prepared crystals are analyzed by Scanning Electron Microscopy (SEM) were showed that the products consists of flaky in nature. The Bandwidth of the synthesized sample was calculated by UV- visible spectrum. The presence of compounds in nano powders were confirmed by Energy Dispersive X-ray diffraction (EDAX). Copper oxide has applications as a P-type semiconductor, because it has a narrow band gap of energy of 1.2 e V. Zinc doped copper oxide has applications in the wide variety of fields such as medicine, industries, sunscreens, agriculture etc.

Download Full-text

Synthesis, characterization and antibacterial activity of copper oxide nanoparticles

Nanoscale Reports ◽

10.26524/nr.3.16 ◽

2020 ◽

Vol 3 (2) ◽

Author(s):

Hemalatha D ◽

Shanmugapriya B

Keyword(s):

Antibacterial Activity ◽

Copper Oxide ◽

Copper Chloride ◽

Chemical Precipitation ◽

Copper Oxide Nanoparticles ◽

Precipitation Method ◽

Klebsiella Pneumonia ◽

Oxide Nanoparticles ◽

X Ray ◽

Chloride Dihydrate

Copper oxide nanoparticles were synthesized by Chemical Precipitation Method using Copper Chloride Dihydrate (CuCl2. 2H2O), Sodium hydroxide (NaOH) as a precipitating agent. The Synthesized Copper Oxide nanoparticles were characterized by X-ray diffraction (XRD), Scanning Electron Microscope (SEM), Energy Dispersive X-ray (EDX) Spectroscopy, Fourier Transform Infrared Spectroscopy (FTIR). The Antibacterial activity of copper Oxide nanoparticles was tested against both gram positive and negative bacteria. In XRD, the crystal size and dislocation density of Copper Oxide nanoparticles were calculated, Element’s purity was determined by EDX spectra. The SEM image confirms the presence of homogeneous spherical distribution of copper oxide nanoparticles. The nanoparticles shows interactions between copper and oxygen atoms were supported by FTIR studies. Copper Oxide nanoparticles have exhibits good antibacterial activity against Klebsiella pneumonia, Escherichia coli,Staphylococcus, and Bacillus cereus.

Download Full-text