Structure and physical properties of NiO/Co3O4 nanoparticles

Mahmoud Naseri; Arash Dehzangi; Halimah Mohamed Kamari; Alex See; Mina Abedi; Reza Salasi; Ahmad Nozad Goli-Kand; Pouya Dianat; Farhad Larki; Alam Abedini; Jumiah Hassan; Ahmad Kamalian Far; Burhanuddin Y. Majlis

doi:10.3390/met6080181

Structure and physical properties of NiO/Co₃O₄ nanoparticles

Mahmoud Naseri^*, Arash Dehzangi, Halimah Mohamed Kamari, Alex See, Mina Abedi, Reza Salasi, Ahmad Nozad Goli-Kand, Pouya Dianat, Farhad Larki, Alam Abedini, Jumiah Hassan, Ahmad Kamalian Far, Burhanuddin Y. Majlis

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

The thermal treatment method was employed to prepare nickel-cobalt oxide (NiO/CO₃O₄) nanoparticles. This method was attempted to achieve the higher homogeneity of the final product. Specimens of nickel-cobalt oxide were characterized by various experimental techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR). X-ray diffraction results showed that there was no crystallinity in the predecessor, and it still had the amorphous phase. The formations of the crystalline phases of the nickel-cobalt oxide nanoparticles started from 350–500 °C, and the final products had different crystallite sizes ranging from 11–35 nm. Furthermore, the variation of DC conductivity (σ_dc), impedance, tangent loss (tgδ) and dielectric constant (εʹ) of the calcined specimens with frequency in the range of 10²–10⁶ Hz was investigated. σ_dc showed a value of 1.9 × 10^-6 S/m, 1.3 × 10^-6 S/m and 1.6 × 10^-6 S/m for the specimens calcined at 350, 400 and 450 °C, respectively. Additionally, a decrease in tgδ values with an increase in temperature was observed. Finally, the formed nanoparticles exhibited ferromagnetic behaviors, which were confirmed by using a vibrating sample magnetometer (VSM).

Original language	English (US)
Article number	181
Journal	Metals
Volume	6
Issue number	8
DOIs	https://doi.org/10.3390/met6080181
State	Published - Aug 2016
Externally published	Yes

Keywords

Conductivity
Dielectric constant
Magnetic properties
Nickel-cobalt oxide nanoparticles

ASJC Scopus subject areas

Metals and Alloys
General Materials Science

Access to Document

10.3390/met6080181

Cite this

@article{f39811793e56420caa765800a64ffb4e,

title = "Structure and physical properties of NiO/Co3O4 nanoparticles",

abstract = "The thermal treatment method was employed to prepare nickel-cobalt oxide (NiO/CO3O4) nanoparticles. This method was attempted to achieve the higher homogeneity of the final product. Specimens of nickel-cobalt oxide were characterized by various experimental techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR). X-ray diffraction results showed that there was no crystallinity in the predecessor, and it still had the amorphous phase. The formations of the crystalline phases of the nickel-cobalt oxide nanoparticles started from 350–500 °C, and the final products had different crystallite sizes ranging from 11–35 nm. Furthermore, the variation of DC conductivity (σdc), impedance, tangent loss (tgδ) and dielectric constant (εʹ) of the calcined specimens with frequency in the range of 102–106 Hz was investigated. σdc showed a value of 1.9 × 10-6 S/m, 1.3 × 10-6 S/m and 1.6 × 10-6 S/m for the specimens calcined at 350, 400 and 450 °C, respectively. Additionally, a decrease in tgδ values with an increase in temperature was observed. Finally, the formed nanoparticles exhibited ferromagnetic behaviors, which were confirmed by using a vibrating sample magnetometer (VSM).",

keywords = "Conductivity, Dielectric constant, Magnetic properties, Nickel-cobalt oxide nanoparticles",

author = "Mahmoud Naseri and Arash Dehzangi and Kamari, {Halimah Mohamed} and Alex See and Mina Abedi and Reza Salasi and Goli-Kand, {Ahmad Nozad} and Pouya Dianat and Farhad Larki and Alam Abedini and Jumiah Hassan and Far, {Ahmad Kamalian} and Majlis, {Burhanuddin Y.}",

note = "Publisher Copyright: {\textcopyright} 2016 by the authors; licensee MDPI, Basel, Switzerland.",

year = "2016",

month = aug,

doi = "10.3390/met6080181",

language = "English (US)",

volume = "6",

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AU - Naseri, Mahmoud

AU - Dehzangi, Arash

AU - Kamari, Halimah Mohamed

AU - See, Alex

AU - Abedi, Mina

AU - Salasi, Reza

AU - Goli-Kand, Ahmad Nozad

AU - Dianat, Pouya

AU - Larki, Farhad

AU - Abedini, Alam

AU - Hassan, Jumiah

AU - Far, Ahmad Kamalian

AU - Majlis, Burhanuddin Y.

PY - 2016/8

Y1 - 2016/8

N2 - The thermal treatment method was employed to prepare nickel-cobalt oxide (NiO/CO3O4) nanoparticles. This method was attempted to achieve the higher homogeneity of the final product. Specimens of nickel-cobalt oxide were characterized by various experimental techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR). X-ray diffraction results showed that there was no crystallinity in the predecessor, and it still had the amorphous phase. The formations of the crystalline phases of the nickel-cobalt oxide nanoparticles started from 350–500 °C, and the final products had different crystallite sizes ranging from 11–35 nm. Furthermore, the variation of DC conductivity (σdc), impedance, tangent loss (tgδ) and dielectric constant (εʹ) of the calcined specimens with frequency in the range of 102–106 Hz was investigated. σdc showed a value of 1.9 × 10-6 S/m, 1.3 × 10-6 S/m and 1.6 × 10-6 S/m for the specimens calcined at 350, 400 and 450 °C, respectively. Additionally, a decrease in tgδ values with an increase in temperature was observed. Finally, the formed nanoparticles exhibited ferromagnetic behaviors, which were confirmed by using a vibrating sample magnetometer (VSM).

AB - The thermal treatment method was employed to prepare nickel-cobalt oxide (NiO/CO3O4) nanoparticles. This method was attempted to achieve the higher homogeneity of the final product. Specimens of nickel-cobalt oxide were characterized by various experimental techniques, including X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR). X-ray diffraction results showed that there was no crystallinity in the predecessor, and it still had the amorphous phase. The formations of the crystalline phases of the nickel-cobalt oxide nanoparticles started from 350–500 °C, and the final products had different crystallite sizes ranging from 11–35 nm. Furthermore, the variation of DC conductivity (σdc), impedance, tangent loss (tgδ) and dielectric constant (εʹ) of the calcined specimens with frequency in the range of 102–106 Hz was investigated. σdc showed a value of 1.9 × 10-6 S/m, 1.3 × 10-6 S/m and 1.6 × 10-6 S/m for the specimens calcined at 350, 400 and 450 °C, respectively. Additionally, a decrease in tgδ values with an increase in temperature was observed. Finally, the formed nanoparticles exhibited ferromagnetic behaviors, which were confirmed by using a vibrating sample magnetometer (VSM).

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