Structural and Optical Absorption Analysis of CuO Nanoparticles (original) (raw)
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Recently copper oxide nanoparticles attracted the investigators due to their significant characteristics and employment in semiconductors, magnetic storage media, solar energy transformation, near-infrared tilters, high-tech superconductors, gas sensors, photoconductive and photothermal devises. Copper oxide nanoparticles are the semiconductor materials having band gap energy 1.2 eV. In the present study Copper oxide nanoparticles were synthesized by sol gel method using CuCl2.2H2O and sodium hydroxide as precursors. The structure and morphology of synthesized copper oxide nanoparticles was investigated utilizing of X-ray diffraction (XRD) spectroscopy and Scanning Electron Microscopy (SEM).
Synthesis and optical characterization of copper oxide nanoparticles
Copper oxide (CuO) nanoparticles are synthesized by aqueous precipitation method using copper acetate as a precursor and NaOH as a stabilizing agent. This gives a large scale production of CuO nanoparticles easily. X-ray diffraction pattern (XRD) reveals single phase monoclinic structure. Scanning electron microscopy (SEM) showed the rectangular morphology of as prepared CuO nanoparticles. The transmission electron microscopy (TEM) showed 5-6 nm size of as prepared CuO nanoparticles. Photoluminescence (PL) showed band edge emission at 398 nm and green emission at 527 nm. The band edge-absorption peak is found to be at 355 nm.
International Journal of Nanomaterials and Biostructures, 2016
Copper oxide (CuO) nanoparticles were synthesized by aqueous solution method using copper acetate as a precursor and NaOH as a stabilizing agent. This gives a large scale production of CuO nanoparticles easily. Characterization of synthesized CuO nanoparticles done by various instrumental techniques such as UV-Vis absorption spectra confirms the thermodynamically stable CuO layers. The fuctional groups identified through the Fouriour Transform Infrared spectroscopy (FTIR) confirms the CuO was capped with Poly Ethylene Glycol (PEG). X-ray diffraction pattern (XRD) reveals single phase monoclinic structure. The average crystalline size of the paerticles found to be 15 nm with debey-Scherrer's formulae. Scanning electron microscopy (SEM) showed the nanocrystals of small sized particles morphology of as prepared CuO nanoparticles. Elemental analysis of CuO nanoparticles done by EDS, which confirms the presence of Cu and oxizen molecules as atomic % is 36.37 and 60.21 respectively. Photoluminescence (PL) showed band edge emission at 398 nm and green emission at 527 nm. The band edge-absorption peak is found to be at 355 nm.
OAlib, 2015
Copper oxide nanoparticles (CuO-NPs) were synthesized via chemical precipitation method using copper (II) chloride dihydrate and sodium hydroxide. Then nanoparticles were characterized by using X-ray Diffraction (XRD), Scanning Electron Microscope (SEM), Energy Dispersive X-ray (EDX), and Fourier Transform Infra Red (FTIR) spectroscopy. The XRD patterns and EDX spectra showed that the prepared CuO-NPs were highly pure, crystalline and nano-sized. The SEM image suggested that nano particles were spherical and there was a tendency of agglomerations. The nanoparticles showed interactions between copper and oxygen atoms supported by FTIR studies.
Copper oxide nanoparticles synthesis and characterization using UV-vis spectrophotometer and TEM
International Journal of Research in Pharmaceutical Sciences
To synthesise Copper oxide nanoparticles and study it's characterisation using UV -viz - Spectrophotometer and TEM. Copper oxide nanoparticles are eco-friendly, cost-efficient and diverse utilisation all over the medical field. The shape of the CuO nanoparticles are spherical, and its characterisation is done using SEM, TEM, and UV-vis techniques. The size of the nanoparticles mediated in each plant extract differs from one another. MATERIALS AND METHODS * Collection and Preparation of Plant extracts. * Synthesis Of CuONPs * Characterization of copper nanoparticles * preparation of nanoparticles powder. The plant extract is in green colour, and the CuO nanoparticles are seen in light yellowish in colour. Uv-VIS SPECTROMETER: The particle size ranges from 2-100nm and shape is spherical. The graph reached its peak at the wavelength of 300nm. The TEM shows spherical shape, dispersion and versatile nanoparticles. They appear to be arranged in a cluster, open and quasi-linear supe...
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IOSR Journal of Applied Physics, 2013
Cupric oxide (CuO) nanoparticles were prepared by the chemical route by calcinations at a higher temperature from 300 o C to 400 o C. For the comparison transmission electron microscopy (TEM) and x-ray diffraction (XRD) measurements were made through JCPDS. There is good agreement between data produced by spectroscopy and the microscopic measurements.
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Structural and magnetic studies on CuO nanoparticles prepared by sol-gel route are reported. Evolution of structure, magnetic properties and optical absorption analysis of these nanoparticles were studied using X-ray diffraction (XRD), vibrating sample magnetometer (VSM) and UV-Visible spectrophotometer. XRD analysis indicated that the crystallite size is of the order of 25.1 nm for the copper oxide nanoparticle annealed at 1000 ˚C. The role of oxygen vacancies is to generate free carriers mediating ferromagnetism between Cu spins.
One Step Synthesis and Optical Evaluation of Copper Oxide (CuO) Nanoparticles
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One-dimensional nanostructural materials are currently the focus of considerable interest. Many methods have been used for the preparation of nanoparticles. However, to our knowledge, complex process control, high reaction temperatures or long synthesis time may be required for these approaches. Here we report a novel and simple one-step for synthesis of highly stable and freestanding cupric oxide (CuO) nanoparticles of approximately 10 and 12 nm in size which have been successfully synthesized via electrochemical method. Ultraviolet-visible spectroscopy (UV-VIS), X-ray diffraction (XRD) and Fourier transformation infrared spectroscopy (FTIR) were introduced to characterize the samples. The results indicate that growth conditions are responsible for different sizes.
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.
A Low Cost Synthesis and Characterization of CuO Nanoparticles for Photovoltaic Applications
Ghana Journal of Science, 2019
A simple low cost chemical route has been used to synthesize cupric oxide nanoparticles. The synthesized CuO nanoparticles were characterized using XRD, TEM and UV-absorption. X-ray diffraction analysis showed the synthesized nanoparticles to be a pure cupric oxide. EDAX analysis showed the presence of copper and Oxygen in the as prepared CuO nano particles, with the AAS indicating that Cu2+ represented 53.5% of the sample. The particle size and particle size distribution of the cupric oxide nanoparticles were obtained by transmission electron microscopy (TEM) whereas the crystallite size and crystallite size distribution were obtained by X-ray diffraction. The particle size was found to be between 20 nm and 60 nm. The particle size distribution obtained from cumulative percentage frequency plots features a log-normal function. Absorbance measurements and analysis showed that the material has an absorbance peak at 314 nm and energy bandgap of 1.48 eV, making it a good candidate for ...