Characterization of Cobalt Oxide Nanoparticles Prepared by the Thermal Decomposition

Farhadi, Saeed; Javanmard, Masoumeh; Nadri, Gholamali

doi:10.17344/acsi.2016.2305

Cited by 148 publications

(45 citation statements)

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“…Co-O bond [17]. The 660 cm -1 band is characteristic of Co 2+ -O vibration in a tetrahedral site, and the band 550 cm -1 is attributable to the Co 3+ -O vibration in an octahedral site of the Co3O4 lattice [18].…”

Section: Ft-ir Studiesmentioning

confidence: 98%

Synthesis and Characterization of Cobalt Oxide Nanoparticles

Latha¹,

Prema²,

Sundar³

2018

JNST

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The present work reports the synthesis and characterization of cobalt oxide nanoparticles. Microwave oven method was used for synthesizing cobalt oxide nanoparticles. The synthesized nanoparticles were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), UV-Vis spectroscopy, photoluminescence (PL) and scanning electron microscope (SEM). The prepared samples show poor crystalline nature so that the samples were calcined at 300 °C for 1 hr. The calcined samples were characterized for further changes in its morphology. XRD identifies the sample is in Co3O4 phase with face-centered cubic structure. Debye-Scherer formula was used to calculate the average crystallite size of the annealed sample and it was found to be 7 to 28 nm. In addition to crystallite size, specific surface area, dislocation density and microstrain are calculated using XRD. Williamson-Hall plot was used to calculate the size and strain. FT-IR spectrum shows two stretching bands at 660 and 550 cm−1 which confirm the functional group present in the cobalt oxide nanoparticles. In optical absorption studies, a blue shift in the energy band gap reveals the quantum confinement effect. Photoluminescence spectra shows emission peak in the visible region.

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Section: Ft-ir Studiesmentioning

confidence: 98%

Synthesis and Characterization of Cobalt Oxide Nanoparticles

Latha¹,

Prema²,

Sundar³

2018

JNST

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“…It is noteworthy to mention that the geometries of the studied complexes are similar to L-arginine metal complex reported before [41], which have been confirmed by X-ray crystallographic data of single crystals. hich is the intense peak [44].…”

Section: Ermal Analysismentioning

confidence: 99%

Transition Metal Complexes of Mixed Bioligands: Synthesis, Characterization, DFT Modeling, and Applications

Abdel‐Mottaleb

Ismail

2019

Journal of Chemistry

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Divalent transition metal complexes [MGlu-Arg (H2O)]H2O and [MGlu-Arg (H2O)]H2O, where M = Co, Ni, Cu, and Zn, Glu = glutamic acid, and Arg = L-arginine, are prepared and characterized using different techniques. DFT and TD-DFT modelling validated and interpreted some experimental results. Weight loss technique reveals efficient corrosion inhibition action of these complexes towards aluminum metal at different temperatures. Our results point to corrosion inhibition through chemical adsorption on the aluminum surface. Additionally, a facile calcination of Co and Cu complexes at 550°C yields nanosized oxides of Co3O4, CoO, and CuO crystalline phases. The complexes show remarkable biological activities towards pathogenic bacteria and fungi. Moreover, in vitro anticancer activity evaluation of these complexes is achieved against hepatocellular carcinoma (HepG-2). The results are correlated with molecular descriptors such as chemical potential and hardness obtained from the frontier orbitals.

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“…Thermal decomposition is widely used in the synthesis of Co 3 O 4 electrode materials. In a typical thermal decomposition method, precursors are prepared by adding inorganic or organic salt solutions, and Co 3 O 4 nanoparticles are synthesized via heating the precursors in air or another atmosphere [49]. The precursors gradually decompose into water, carbon dioxide, carbon and monoxide, etc.…”

Section: Thermal Decompositionmentioning

confidence: 99%

Recent Advance in Co3O4 and Co3O4-Containing Electrode Materials for High-Performance Supercapacitors

Wang

Meng

et al. 2020

Molecules

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Among the popular electrochemical energy storage devices, supercapacitors (SCs) have attracted much attention due to their long cycle life, fast charge and discharge, safety, and reliability. Transition metal oxides are one of the most widely used electrode materials in SCs because of the high specific capacitance. Among various transition metal oxides, Co3O4 and related composites are widely reported in SCs electrodes. In this review, we introduce the synthetic methods of Co3O4, including the hydrothermal/solvothermal method, sol–gel method, thermal decomposition, chemical precipitation, electrodeposition, chemical bath deposition, and the template method. The recent progress of Co3O4-containing electrode materials is summarized in detail, involving Co3O4/carbon, Co3O4/conducting polymer, and Co3O4/metal compound composites. Finally, the current challenges and outlook of Co3O4 and Co3O4-containing composites are put forward.

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Characterization of Cobalt Oxide Nanoparticles Prepared by the Thermal Decomposition

Cited by 148 publications

References 50 publications

Synthesis and Characterization of Cobalt Oxide Nanoparticles

Synthesis and Characterization of Cobalt Oxide Nanoparticles

Transition Metal Complexes of Mixed Bioligands: Synthesis, Characterization, DFT Modeling, and Applications

Recent Advance in Co3O4 and Co3O4-Containing Electrode Materials for High-Performance Supercapacitors

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