scholarly journals Synthesis and Characterization of Cobalt Ferrite through Co-Precipitation Technique

2020 ◽  
Vol 10 (1) ◽  
pp. 1871-1876
Keyword(s):  
Cobalt Ferrite ◽  
Magnetic Behavior ◽  
Spectral Studies ◽  
Ftir Analysis ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
Phase Spinel ◽  
Uv Visible ◽  
Co Precipitation

The device formation in current technology demands effective magnetic materials. Cobalt ferrite nanoparticles were synthesized by the co–precipitations method using the precursor materials (Fe(No3)3 9H2O) and (Co(NO3)2 6H2O). X-ray diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR) analysis, and UV–Visible absorption spectral studies were used to analyze the structural, chemical/functional groups with possible stretching and optical bandgap properties of the CoFe2O4 powder. XRD results designate that the resultant particles are crystalline, pure single-phase spinel structure. From the FTIR analysis reveals that C-C, C=O stretching, and the shift is leaked indicating that the presence CoFe2O4. The absorption and the optical band gaps values are increased trend with temperatures also evidence that is enhancing magnetic behavior.

scholarly journals Characterization of Cubic AgSbS2Nanostructured Flowers Synthesized by Microwave-Assisted Refluxing Method

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Narongrit Tipcompor ◽  
Somchai Thongtem ◽  
Titipun Thongtem
Keyword(s):  
Electron Microscopy ◽  
Energy Gap ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
X Ray ◽  
Microwave Assisted ◽  
Direct Energy ◽  
Uv Visible ◽  
Direct Energy Gap

Cubic AgSbS2nanostructured flowers of nanorods were successfully synthesized by microwave-assisted refluxing of AgNO3, Sb(CH3COO)3, and L-cysteine (C3H7NO2S) dissolved in ethylene glycol at the pH of 4, characterized by X-ray diffraction (XRD) and electron microscopy (EM). The 1.89 eV direct energy gap was determined by UV-visible absorption, including two 688 and 857 nm emission wavelengths by photoluminescence (PL) spectroscopy. A possible formation mechanism of AgSbS2nanostructured flowers was also proposed according to the experimental results.

Preparation and Characterization of Skin-Colored N-Doped ZnO Nanocrystals

2010 ◽  
Vol 663-665 ◽  
pp. 243-246
Author(s):  
Han Mei Hu ◽  
Chong Hai Deng ◽  
Qiang Fang ◽  
Ya Gao ◽  
Meng Wei Song
Keyword(s):  
Photoelectron Spectroscopy ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
X Ray ◽  
Zno Nanocrystals ◽  
Uv Visible ◽  
Doped Zno ◽  
20 Nm ◽  
Strong Absorption Peak

In this paper, we report a simple two-step approach (microwave-calcinating) to prepare skin-colored N-doped ZnO nanocrystals. X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS) and UV-visible absorption were used to characterize the as-synthesized products. The FESEM results reveal the products mainly take on the morphology of porous flake constructed by 20 nm nanoparticles. UV-Vis spectrum shows a strong absorption peak located at 384nm.

scholarly journals Nanostructure-Related Magnetic Properties of Various Mesoporous Cobalt Oxide and Cobalt Ferrite Spinel Phases

2019 ◽  
Author(s):  
Roberto Köferstein
Keyword(s):  
Magnetic Properties ◽  
Cobalt Oxide ◽  
Cobalt Ferrite ◽  
Magnetic Ordering ◽  
Magnetic Behavior ◽  
X Ray Diffraction ◽  
X Ray ◽  
Spinel Phases ◽  
Ferrite Spinel

Nanostructure-related magnetic properties are investigated systematically for various mesoporous cobalt oxide (Co3O4) and cobalt ferrite (CoFe2O4) spinel phases. Synthesis of thematerials by nanocasting offers the opportunity to obtain materials which are different from each other with respect to both specific surface area and crystallite size. As a result, the respective contributions of two types of interfaces, namely, “solid–gas” and “solid–solid” interfaces, to the magnetic ordering can be distinguished. Structural characterization of the porous materials by X-ray diffraction, N2 physisorption, and electron microscopy as well as investigation of the magnetic behavior (field-dependent magnetization and temperaturedependentsusceptibility) are presented.

scholarly journals Preparation of Nano Ink Using Cobalt Ferrite and Barium Titanate for Printed Electronic Devices

2020 ◽  
Vol 3 (10) ◽  
pp. 132-135
Author(s):  
Emy Rose Peter ◽  
Jismon Sebastian ◽  
Swapna S. Nair
Keyword(s):  
Barium Titanate ◽  
Cobalt Ferrite ◽  
Diffraction Method ◽  
Band Gap Energy ◽  
X Ray Diffraction ◽  
Visible Spectroscopy ◽  
X Ray ◽  
Pure Cobalt ◽  
Uv Visible

Lead in our body is toxic and hazardous. Here leadfree Cobalt ferrite and Barium Titanate inks have been prepared and fabricated. The prepared inks remained stable without agglomeration or condensation during preservation. Cobalt Ferrite and Barium Titanate Nano inks have been characterized using X-ray diffraction method and UV Visible Spectroscopy. By the analysis of X-ray diffraction (XRD), the resultant inks were confirmed to be of pure Cobalt Ferrite and Barium Titanate powders with cubic structure and tetragonal structure respectively. Lattice parameters and grain size have been determined by X-ray diffraction method. UV Visible Spectroscopy analysis has been done to obtain the band gap energy of the prepared inks. The preparation and characterization of Cobalt Ferrite and Barium Titanate Nano inks are comprehensively demonstrated in this paper.

Synthesis and Characterization of Polymer-Laced Cu-ZnO Nanoparticles

2014 ◽  
Vol 1081 ◽  
pp. 138-141
Author(s):  
Xiao Liu ◽  
Zheng Guan ◽  
Hong Ling Liu ◽  
Jun Hua Wu ◽  
Xian Hong Wang ◽  
...  
Keyword(s):  
Optical Properties ◽  
Zno Nanoparticles ◽  
Biomedical Applications ◽  
X Ray Diffraction ◽  
One Pot ◽  
Visible Absorption ◽  
Transmission Electron ◽  
Structure Of Nanoparticles ◽  
Uv Visible

The polymer-laced Cu-ZnO nanoparticles were successfully synthesized by one-pot non-aqueous nanoemulsion method with the use of PEO-PPO-PEO as the surfactant, C14H29CH(OH)CH2OH as the reducing agent, octyl ether as the solvent, Zn (acac)2 and Cu (acac)2 as precursors. The Morphology and structure of nanoparticles were analyzed by transmission electron microscopy (TEM) and X-ray diffraction (XRD). UV-visible absorption spectroscopy (UV-vis) and photoluminescence spectrometry (PL) were employed to valuate the optical properties of the nanoparticles. The Cu-ZnO nanoparticles with well defined optical properties are promising for optical, catalytic and biomedical applications.

Preparation, Morphological and Structural Properties of Nanocrystalline Ni-Mg Cobalt-Ferrite Synthesized by the Co-Precipitation Method

2015 ◽  
Vol 1109 ◽  
pp. 355-359 ◽  
Author(s):  
Rizuan Mohd Rosnan ◽  
Zulkafli Othaman ◽  
Ali A. Ati
Keyword(s):  
Single Phase ◽  
Spinel Ferrite ◽  
Precipitation Method ◽  
Average Crystalline Size ◽  
X Ray Diffraction ◽  
Cobalt Ferrites ◽  
Phase Spinel ◽  
Co Precipitation ◽  
Good Agreement

The present study describes the morphological and structural characterization of nanosized Ni-Mg cobalt-ferrites. The nominal compositions Co0.5Ni0.5−xMgx Fe2O4 in the range (0.0 ≤ x ≤ 0.5) have been synthesized by co-precipitation method. These nanopowder products were sintered in furnace at temperature of 900°C for 10 hour with a heating rate of 5°C/min to obtain these ferrites. The prepared nanoferrites were characterized by X-ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) with varying concentration (x) in the composition of the prepared nanoferrites. XRD confirmed formation of single phase spinel ferrite with average crystalline size in the range of 34–37 nm. Lattice constant (a) increases with an increase of Mg concentration. Further information about the structure and morphology of the nanoferrites was obtained from FESEM and results are in good agreement with XRD.

Thermal Conductivity Analysis and Characterization of Copper Oxide Nanofluids through Different Techniques

2016 ◽  
Vol 40 ◽  
pp. 105-112 ◽  
Author(s):  
S. Nallusamy
Keyword(s):  
Thermal Conductivity ◽  
Copper Oxide ◽  
Average Crystallite Size ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
Xrd Pattern ◽  
Transmission Electron ◽  
Wet Chemical ◽  
Uv Visible

The aim of this research is to analyse the thermal conductivity of copper oxide (CuO) nanofluids. In the present study CuO nanofluids were prepared using a new method of wet chemical method and the testing was carried out by various techniques. X-Ray Diffraction (XRD) pattern was used to determine the crystal structure and the average crystallite size of the CuO nanofluids. Scanning Electron Microscope (SEM) and Transmission Electron Microscopy (TEM) were used to study the morphology and the particle size. Similarly Dynamic Light Scattering (DLS) was used to estimate the size of the CuO nanofluids. Finally UV-Visible absorption spectrum was used to measure the optical property of the CuO nanofluids. The thermal conductivity of CuO nanofluids was analyzed using KD2 Pro thermal property analyzer and concludes that the thermal conductivity is increased with the increase of particle loading.

scholarly journals Synthesis and characterization of novel copolymers based on carbazole and anthracene, for optoelectronic applications

2014 ◽  
Vol 10 (3) ◽  
pp. 2430-2440
Author(s):  
N. Belghiti ◽  
M. Bouachrine ◽  
K. Alimi
Keyword(s):  
Electron Microscopy ◽  
Synthesis And Characterization ◽  
Ir Absorption ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
X Ray ◽  
Uv Visible ◽  
Scanning Electron ◽  
Cp Mas 13C Nmr

The goal of this work is to study a new copolymer which combines the Ecbz properties and those Ant. First, we describe the route for preparing the new copolymer. Then, we report characterization measurements based on solid-state Nuclear Magnetic Resonance (CP-MAS 13C NMR), Raman, IR absorption, UV–visible absorption, photoluminescence spectroscopy, Scanning Electron Microscopy (SEM), and X-ray diffraction.

scholarly journals Synthesis of Fe3O4/MIL-101 material and evaluation of photocatytic activity

2020 ◽  
Vol 9 (3) ◽  
pp. 40-44
Author(s):  
Kim Nguyen Van ◽  
Thanh Huynh Thi Minh
Keyword(s):  
Visible Light ◽  
Visible Light Region ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
X Ray ◽  
Light Region ◽  
Uv Visible ◽  
Absorption Spectrometer ◽  
Scanning Electron

In the present work, results synthesis of  Fe3O4/MIL-101 material and evaluation of photocatytic activity under visible light region. Characterization of Fe3O4/MIL-101 was investigated by using techniques including X-ray diffraction pattern (XRD), scanning electron microscopy (SEM), IR spectra and UV-visible absorption spectrometer. Evaluation of the photocatalytic activity of Fe3O4/MIL-101 material on the conversion of blue methylen solution under degradation in the visible light region.

scholarly journals Morphologic, structural, and magnetic characterization of cobalt ferrite nanoparticles synthesized at different temperatures

2021 ◽  
Vol 9 (9) ◽  
pp. 399-405
Author(s):  
Kétlin Santos Alberton ◽  
Liza Bruna Reis Monteiro ◽  
Anne Beatriz Ramos Moraes ◽  
Raynara Vitória dos Santos Paiva Bucar ◽  
Maicon Maciel Ferreira de Araujo ◽  
...  
Keyword(s):  
Cobalt Ferrite ◽  
Magnetic Moments ◽  
X Ray Diffraction ◽  
Cofe2o4 Nanoparticles ◽  
First Order ◽  
Transmission Electron ◽  
Two Samples ◽  
Different Temperatures ◽  
Co Precipitation

In this study we report on the synthesis and characterization of cobalt ferrite (CoFe2O4) nanoparticles (NPs), synthesized by chemical co-precipitation in alkaline medium. Two samples were synthesized at two different temperatures, 35 and 90 oC. Both samples were characterized by Transmission Electron Microscopy (TEM), x-ray diffraction (XRD), and room-temperature (RT) magnetization. Two samples showed superparamagnetic behavior (SPM) at RT. TEM reveals morphological mean diameter increasing 5.8 nm to 10.4 nm, with the increase of the co-precipitation temperature. XRD confirm the inverse cubic spinel structure. The RT magnetization curves were analyzed by the first-order Langevin function averaged out by a lognormal distribution function of magnetic moments. This analysis showed saturation magnetization and magnetic moment increases from 60.2 to 74.8 emu/g and from 3.9 x 103 to 8.2 x 103 mB, respectively.

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