scholarly journals Structural characterisation of copper oxide by X-ray diffraction

2021 ◽  
pp. 70-96
Author(s):  
Roberto LÓPEZ ◽  
◽  
Jesús NAMIGTLE ◽  
Jorge MASTACHE
Keyword(s):  
Copper Oxide ◽  
Thermal Oxidation ◽  
Crystal Size ◽  
Cupric Oxide ◽  
Texture Coefficient ◽  
Oxide Phase ◽  
X Ray Diffraction ◽  
X Ray ◽  
Structural Characterisation

In this work, the study of the structural characterization of copper oxide by the X-ray diffraction technique is presented. To obtain layers of copper oxide, sputtering and thermal oxidation techniques were combined. The average crystal size was calculated for the sputtered copper samples. For the copper oxide films obtained by thermal oxidation, both the crystal size and the texture coefficient were calculated. The crystalline quality was poor for layers obtained by sputtering. Thermal oxidation carried out on these films transformed its structure to the copper oxide phase known as cupric oxide.

Structure Characterization of Sintered CaO-Al2O3-SiO2 Glass-Ceramic Reinforced with Spodumene

2013 ◽  
Vol 834-836 ◽  
pp. 309-314
Author(s):  
Zi Fan Xiao ◽  
Jin Shu Cheng ◽  
Jun Xie
Keyword(s):  
Glass Ceramic ◽  
Energy Dispersive Spectrometry ◽  
Crystal Size ◽  
Bending Strength ◽  
Glass Ceramics ◽  
Structure Characterization ◽  
X Ray Diffraction ◽  
Crystalline Phases ◽  
X Ray

A glass-ceramic belonging to the CaO-Al2O3-SiO2(CAS) system with different composition of spodumene and doping the Li2O with amount between 0~2.5 % (mass fraction) were prepared by onestage heat treatment, under sintering and crystallization temperature at 1120 °C for two hours. In this paper, differential thermal analysis, X-ray diffraction, scanning electron microscopy, energy dispersive spectrometry and bending strength test were employed to investigate the microstructure and properties of all samples. β-wollastonite crystals were identified as the major crystalline phases, and increasing Li2O was found to be benefit for the crystallization and tiny crystalline phases remelting, resulting in the content of major crystalline phases increased first and then decreased with increasing the expense of spodumene. Meanwhile, the crystal size can be positively related with the content of Li2O. The preferable admixed dosage of spodumene can be obtained, besides the strength of glass-ceramics can be more than 90 MPa.

Synthesis and Characterization of Zinc Doped Hydroxyapatite for Bone Substitute Applications

2014 ◽  
Vol 660 ◽  
pp. 942-946
Author(s):  
Mohamad Firdaus Abdul Wahid ◽  
C.M. Mardziah ◽  
Koay Mei Hyie ◽  
N.R. Nik Roselina
Keyword(s):  
Crystal Size ◽  
Diffraction Method ◽  
Lattice Parameters ◽  
Phase Changes ◽  
Precipitation Method ◽  
Zinc Ions ◽  
Crystal Shape ◽  
X Ray Diffraction ◽  
X Ray

Hydroxyapatite was prepared by using precipitation method. The substitution of zinc ions in hydroxyapatite structure was studied by several characterization techniques. Several concentration of zinc ions were substituted into hydroxyapatite. Characterization technique such as X-ray diffraction method was used to study the phase changes and the lattice parameters with the addition of zinc. Field emission scanning electron microscopy was used to examine the influence of zinc on the crystal size and the morphology of the as-synthesized powders. Based on X-ray diffraction result, the addition of zinc affects the lattice parameters and phase. The result showed that zinc ions were substituted in the structure. As zinc substitution increased, the lattice parameters a and c decreased. The crystal shape of hydroxyapatite without zinc ions was regular shapes while hydroxyapatite with zinc ions was irregular and also tends to agglomerates with single particle was calculated about 28 - 34 nm .

scholarly journals Characterization of CuO thin films for gas sensing applications

2019 ◽  
Vol 14 (31) ◽  
pp. 1-12
Author(s):  
Jamal M. Rzaij
Keyword(s):  
Room Temperature ◽  
Gas Sensing ◽  
Cupric Oxide ◽  
Laser Pulses ◽  
X Ray Diffraction ◽  
Energy Increase ◽  
Nano Structure ◽  
X Ray ◽  
Sensing Applications

Nanostructural cupric oxide (CuO) films were prepared on Si and glass substrate by pulsed laser deposition technique (PLD) using laser Nd:YAG, using different laser pulses energies from 200 to 600 mJ. The X-ray diffraction pattern (XRD) of the films showed a polycrystalline structure with a monoclinic symmetry and preferred orientation toward (111) plane with nano structure. The crystallite size was increasing with increasing of laser pulse energy. Optical properties was characterized by using UV–vis spectrometer in the wave lengthrange (200-1100) nm at room temperature. The results showed that the transmission spectrum decreases with the laser pulses energy increase. Sensitivity of NO2 gas at different operating temperatures, (50°C, 100°C, 150°C and 200°C) was calculated.

scholarly journals Preparation and characterization of cobalt and copper oxide nanocrystals

2019 ◽  
Vol 37 (3) ◽  
pp. 347-352
Author(s):  
A. H. Moharram
Keyword(s):  
Microwave Irradiation ◽  
Copper Oxide ◽  
Chemical Precipitation ◽  
High Dispersion ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Direct Band ◽  
Cuo Nanocrystals

AbstractCopper oxide and cobalt oxide (Co3O4, CuO) nanocrystals (NCs) have been successfully prepared using microwave irradiation. The obtained powders of the nanocrystals (NCs) were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), thermogravimetric (TGA) analysis and Fourier-transform infrared spectroscopy. The obtained results confirm the presence of both nanooxides which have been produced during chemical precipitation using microwave irradiation. TEM micrographs have shown that the obtained nanocrystals are characterized by high dispersion and narrow size distribution. The results of X-ray diffraction confirmed those obtained from the transmission electron microscope. Optical absorption analysis indicated the direct band gap for both kinds of the nanocrystals.

Synthesis and Characterization of MgPSZ-PMMA Composite by Sol-Gel Modification and Direct Foaming Technique Using Egg Whites

2016 ◽  
Vol 720 ◽  
pp. 290-295
Author(s):  
Veni Takarini ◽  
Alfend Rudyawan ◽  
Andri Hardiansyah ◽  
Rifki Septawendar ◽  
Niki Prastomo ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Crystal Size ◽  
Sol Gel ◽  
Porous Structures ◽  
X Ray Diffraction ◽  
X Ray ◽  
Direct Foaming ◽  
Transmission Electron ◽  
Direct Foaming Method

This study prepared Magnesium-Partially Stabilized Zirconia (Mg-PSZ) filler synthesis and direct foaming technique using egg whites, and impregnated by PMMA. The results were evaluated systematically by X-ray diffraction (XRD), Scanning Electron Microscope (SEM), and Transmission Electron Microscope (TEM). XRD results denote that the powder sample of MgPSZ was successfully formed with various crystal size of tetragonal and monoclinic phase. SEM and TEM observations revealed that nanoparticles MgPSZ were in spherical and long rounded shapes. Furthermore, SEM observation revealed that the direct foaming method were also successful in the formation of porous structures which favourable for impregnation process by PMMA. The use of egg whites as a polymer precursor in both methods demonstrates that porous specimens contained nanosized, predominantly tetragonal, Mg-PSZ powders were successfully synthesized. This shall yield an interesting prospect towards cheap, reliable, and biocompatible product to resemble the modulus elasticity of dentin.

scholarly journals Fabrikasi Nanotubes Titanium Dioksida (TiO2) Menggunakan Metode Hidrotermal

2017 ◽  
Vol 3 (1) ◽  
pp. 20-26
Author(s):  
Atik Setyani ◽  
Emas Agus Prastyo Wibowo
Keyword(s):  
Tio2 Nanoparticles ◽  
Tio2 Nanotubes ◽  
Crystal Size ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron

Nanotubes received great attention because it has a high surface area. In this study, TiO2 nanotubes fabricated via hydrothermal method from  synthesis of TiO2 nanoparticles via sol-gel method. Catalysts that have been synthesized later in the characterization by X-Ray Diffraction (XRD) to obtain the crystal size and crystallinity. Crystal size of TiO2 nanoparticles at a temperature of 450C is 13.78 nm. Then characterized by Transmission Electron Microscopy (TEM) to look at the formation of nanotubes. Characterization of TiO2 nanotubes with TEM shows that the structure of the tubes had already been formed TNTs although the growth has not been perfect. It can be seen from the structure TNTs who tend to be short and yet so irregular.DOI: http://dx.doi.org/10.15408/jkv.v0i0.5036  

scholarly journals Characterization of Copper Complex Nanoparticles synthesized by Plant Polyphenols

2017 ◽  
Author(s):  
Zhiqiang Wang ◽  
Pengfei An
Keyword(s):  
Copper Oxide ◽  
Copper Ions ◽  
Spherical Particles ◽  
Oxide Material ◽  
X Ray Diffraction ◽  
X Ray ◽  
X Ray Absorption ◽  
Synthesis Approach ◽  
Ceramic Catalyst

AbstractIn this paper a kind of copper oxide material of copper–polyphenols complex nanoparticles (Cu–P NPs) were synthesized by Cinnamomum pedunculatum leaves extract, which have different morphology and appearance compared with usual copper oxides Cu2O and CuO. For better understanding about this material, the Cu–P NPs were characterized using scanning electron microscopy (SEM), X-ray absorption spectroscopy (XAS), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA). It was found that synthesized Cu–P NPs were amorphous with spherical particles ranged from 80 to 500 nm. XAS data analysis indicated that the synthesized Cu–P NPs has different molecular structure with Cu2O and CuO. It is assumed that the copper ions chelated with polyphenol molecule. The nanoparticles showed a clear anti Escherichia coli activity in this study, and may also be used in fields of semiconductor, ceramic, catalyst, and sensor. This synthesis approach provided a novel route to manufacture copper oxide nanomaterial.

Growth and characterization of spray pyrolysis via deposited Copper oxide thin film

2018 ◽  
Vol 1 (2) ◽  
pp. 9-12
Author(s):  
S.P. Soundararajan ◽  
M Murugan ◽  
K Mohanraj ◽  
Babu Balraj ◽  
Tamiloli Devendhiran
Keyword(s):  
Thin Films ◽  
Copper Oxide ◽  
Spray Pyrolysis ◽  
Spray Pyrolysis Technique ◽  
Oxide Thin Film ◽  
X Ray Diffraction ◽  
X Ray ◽  
Nebulizer Spray Pyrolysis ◽  
Jet Nebulizer

In this work the copper oxide thin films have been coated using Jet nebulizer spray pyrolysis technique. The prepared CuO thin films were characterized by various techniques such as X-ray diffraction (XRD), Scanning Electron Microscope (SEM) and Energy dispersive X-ray spectroscopy (EDX) techniques, in order to study its crystalline nature, particle size and the band gap respectively.

Preparation and Characterization of Copper Oxide and Copper Nanoparticles

2011 ◽  
Vol 308-310 ◽  
pp. 715-721 ◽  
Author(s):  
Jun Jun Lv ◽  
Ming Yu Li ◽  
Qing Xuan Zeng
Keyword(s):  
Copper Oxide ◽  
Copper Nanoparticles ◽  
Nitrogen Atmosphere ◽  
X Ray Diffraction ◽  
Oxalate Precursor ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Good Catalytic Activity ◽  
Scanning Electron

Copper oxide was prepared via the calcination of copper oxalate precursor. By using high-temperature solvent method, the precursor decomposed under nitrogen atmosphere and copper nanoparticles were obtained. The microstructure and properties of the products were characterized by scanning electron microscopy, X-ray diffraction, UV-Vis spectroscopy, Fourier transform infrared spectroscopy and other analysis methods. The results show that the obtained copper oxide is constructed by nanoparticles. The sample is porous and has a good catalytic activity. Three copper samples were obtained by controlling the reaction time. The particle size of the samples was calculated to be about 44.3 nm, 17.1 nm and 9.9 nm respectively.

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