Comparative Study of Combustion Methods, Opto-Magnetic and Catalytic Properties of Spinel CoAl<sub>2</sub>O<sub>4</sub> Nano- and Microstructures

Jayasree, S.; Manikandan, A.; Mohideen, A. M. Uduman; Barathiraja, C.; Antony, S. Arul

doi:10.1166/asem.2015.1750

Cited by 57 publications

(10 citation statements)

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“…Recently, semiconductor nanomaterials have established wide knowledge than their same bulk materials, due to their size and surface effects, which display distinctive properties such as magneto-optical, electrochemical, sensor materials, bio-medical and photo-catalytic activity [1][2][3][4][5]. Also, the use of semiconductor materials in modern applications as computer and photovoltaic production led to fully open research in the field of materials science [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

The investigation of mechanical and dielectric properties of Samarium doped ZnO nanoparticles

Badreddine

Srour

Awad

et al. 2020

Mater. Res. Express

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Zn1−xSmxO nanoparticles, with 0.00 ≤ x ≤ 0.10, were prepared using chemical co-precipitation method. The structure and morphology of the obtained samples were characterized using x-ray powder diffraction (XRD), transmission electron microscopy (TEM) and scanning electron microscopy (SEM), respectively. However, the mechanical properties were investigated via digital Vickers microhardness tester. Vickers microhardness measurements were carried out at different applied loads, varying between 0.5 and 10 N at dwell time 60 s on pressed discs of average thickness 3 mm. Hv decreased as the Sm-content increased up to 0.02 and then it increased for higher concentrations. Whereas, it increased as the applied load increased, revealing that the samples exhibited a reverse indentation size effect (ISE). The microhardness measurements were interpreted using various models such as Meyer’s law, Hays and Kendall (HK) approach, elastic/plastic deformation (EPD), proportional specimen resistance (PSR) and the indentation-induced cracking (IIC). Mechanical parameters such as Young’s modulus (E), yield strength (Y), fracture toughness (K) and brittleness index (B) were calculated as a function of x. The most adequate model for the true microhardness of these samples is IIC. It was found that the addition of Sm content enhanced the mechanical properties of the prepared samples after x = 0.02. Dielectric measurements were used to compute different parameters such as real and imaginary parts of the complex permittivity, dielectric loss (tan δ) and ac conductivity (σ ac).

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Section: Introductionmentioning

confidence: 99%

The investigation of mechanical and dielectric properties of Samarium doped ZnO nanoparticles

Badreddine

Srour

Awad

et al. 2020

Mater. Res. Express

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“…Furthermore, it was determined that the sample CoAl 2 O 4 ‐microwave assisted SCS achieved better conversion (95.73%) of benzyl alcohol into benzaldehyde than the sample CoAl 2 O 4 ‐SCM (64.52%). It was concluded that the microwaves irradiation that distributed homogeneously within the raw materials produced sufficient energy for the CoAl 2 O 4 spinel formation than the SCS route …”

Section: Oxidation Reactionsmentioning

confidence: 99%

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

et al. 2018

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Solution combustion synthesis (SCS) is a relatively new method for synthesizing catalytic materials with many distinct advantages: simplicity of method, short reaction times, and the capability to regulate crystal lattice parameters and thereby the activity and selectivity of catalysts. Over the last years, SCS has been used for the production and study of a multitude of new catalytic materials. This review considers and discusses the recent developments and trends in SCS of nanocatalysts, while special attention is paid to the development and applications of nanostructured catalysts.

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“…Spinel oxide type AB 2 O 4 , where A and B represent two different sites tetrahedral and octahedral and the oxygen ions form a cubic closed structure, are a class of chemically and thermally stable materials that are suitable for a wide-ranging applications such as catalyst and magnetic materials [1][2][3][4][5][6]. The distribution of cations A and B, these two sites are influenced by the combination and nature of the two cations and is strongly dependent on the preparation and processing conditions [7,8].…”

Section: Introductionmentioning

confidence: 99%

X-ray peak profile analysis of CoAl2O4 nanoparticles by Williamson-Hall and size-strain plot methods

Irfan¹,

Racik²,

Ананд³

2018

MoEM

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Citation: Irfan H, Mohamed Racik K, Anand S (2018) X-ray peak profile analysis of CoAl 2 O 4 nanoparticles by Williamson-Hall and size-strain plot methods. Modern Electronic Materials 4(1): 31-40. https://doi. AbstractCoAl 2 O 4 nanoparticles were prepared by a sol-gel process using citric acid as chelating agent with different calcination temperatures of 600 to 900 °C. The crystalline spinel cubic phase was confirmed by X-ray diffraction results. High-resolution scanning electron microscopy (HRSEM) revealed that nanoparticles of CoAl 2 O 4 morphology showed spherical forms with a certain degree of agglomeration. The Williamson-Hall (W-H) method and size-strain method to evaluate the size of crystallites and strain in the CoAl 2 O 4 nanoparticles peak broadening were applied. Physical parameters such as strain and stress values were calculated for all XRD reflection peaks corresponding to the cubic spinel phase of CoAl 2 O 4 in the range of 20 to 70° from the modified plot shape by W-H plot assuming a uniform deformation model (UDM), uniform stress deformation model (USDM), uniform deformation energy density model (UDEDM) and by the size-strain plot method (SSP). The CoAl 2 O 4 NPs crystal size calculated on the W-H plots and the SSP method are in good agreement with the HRSEM Scherrer method.

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Comparative Study of Combustion Methods, Opto-Magnetic and Catalytic Properties of Spinel CoAl₂O₄ Nano- and Microstructures

Cited by 57 publications

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The investigation of mechanical and dielectric properties of Samarium doped ZnO nanoparticles

The investigation of mechanical and dielectric properties of Samarium doped ZnO nanoparticles

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

X-ray peak profile analysis of CoAl2O4 nanoparticles by Williamson-Hall and size-strain plot methods

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Comparative Study of Combustion Methods, Opto-Magnetic and Catalytic Properties of Spinel CoAl2O4 Nano- and Microstructures

Cited by 57 publications

References 0 publications

The investigation of mechanical and dielectric properties of Samarium doped ZnO nanoparticles

The investigation of mechanical and dielectric properties of Samarium doped ZnO nanoparticles

Review of Recent Studies on Solution Combustion Synthesis of Nanostructured Catalysts

X-ray peak profile analysis of CoAl2O4 nanoparticles by Williamson-Hall and size-strain plot methods

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Comparative Study of Combustion Methods, Opto-Magnetic and Catalytic Properties of Spinel CoAl₂O₄ Nano- and Microstructures