Impact of Cr substitution on the structural, morphological, dielectric, and electrical properties of MgCo2O4 nanoparticles synthesized via solid-state reaction route

This paper highlights the preparation and characterization of MgCo2O4 and Cr-doped MgCo 2O4 nanoparticles grown using a solid-state reaction route. The crystallinity and crystallographic phase structure have been investigated by the X-ray diffraction (XRD), which evidences the cubic crystal structur...

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Autores principales:	Saurav Halder, Karimul Hoque, Tapash Chandra Paul, Goshtha Gopal Biswas, Md. Abdur Razzaque Sarker, S.M. Naimul Mamun, Md. Emran Hossain
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	MgCo2O4 Cr doping Solid state reaction Halder–Wagner (H–W) technique Dielectric constant Industrial electrochemistry TP250-261
Acceso en línea:	https://doaj.org/article/0ee96fdabdaf468eb49e8eafb5f16856
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spelling	oai:doaj.org-article:0ee96fdabdaf468eb49e8eafb5f168562021-11-16T04:27:19ZImpact of Cr substitution on the structural, morphological, dielectric, and electrical properties of MgCo2O4 nanoparticles synthesized via solid-state reaction route2666-845910.1016/j.rsurfi.2021.100028https://doaj.org/article/0ee96fdabdaf468eb49e8eafb5f168562021-11-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S2666845921000210https://doaj.org/toc/2666-8459This paper highlights the preparation and characterization of MgCo2O4 and Cr-doped MgCo 2O4 nanoparticles grown using a solid-state reaction route. The crystallinity and crystallographic phase structure have been investigated by the X-ray diffraction (XRD), which evidences the cubic crystal structure of MgCo2O4 with space group Fd3m. The crystallites of pristine MgCo2O4 have an average size of 18.88 nm, as determined by Scherrer’s formula. It exhibits an increment of crystallite size from 18.88 nm to 21.60 nm with Cr ions substitution in the MgCo2O4 matrix. Halder–Wagner (H–W) technique reveals the parallel results of crystallite size followed by the inversed behavior of dislocation density and lattice strain. The study of FESEM illustrates the aggregation of spherical nanostructures with well-dispersed grains. UV–Vis spectroscopy depicts an enhancement in absorption accompanied by blue shift and increase in Egfrom 4.22 eV to 4.85 eV after Cr addition. Dielectric measurements have revealed that the dielectric constant is noticed to reduce with the introduction of Cr into the MgCo2O4 crystal framework. The electrical resistivity reduces after Cr impurity is incorporated into MgCo2O4 and has been found to decrease with increasing temperature. Impedance analysis has been carried out on MgCo2O4 and Cr-doped MgCo2O4, and it is observed that Cr doping improves the impedance.Saurav HalderKarimul HoqueTapash Chandra PaulGoshtha Gopal BiswasMd. Abdur Razzaque SarkerS.M. Naimul MamunMd. Emran HossainElsevierarticleMgCo2O4Cr dopingSolid state reactionHalder–Wagner (H–W) techniqueDielectric constantIndustrial electrochemistryTP250-261ENResults in Surfaces and Interfaces, Vol 5, Iss , Pp 100028- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	MgCo2O4 Cr doping Solid state reaction Halder–Wagner (H–W) technique Dielectric constant Industrial electrochemistry TP250-261
spellingShingle	MgCo2O4 Cr doping Solid state reaction Halder–Wagner (H–W) technique Dielectric constant Industrial electrochemistry TP250-261 Saurav Halder Karimul Hoque Tapash Chandra Paul Goshtha Gopal Biswas Md. Abdur Razzaque Sarker S.M. Naimul Mamun Md. Emran Hossain Impact of Cr substitution on the structural, morphological, dielectric, and electrical properties of MgCo2O4 nanoparticles synthesized via solid-state reaction route
description	This paper highlights the preparation and characterization of MgCo2O4 and Cr-doped MgCo 2O4 nanoparticles grown using a solid-state reaction route. The crystallinity and crystallographic phase structure have been investigated by the X-ray diffraction (XRD), which evidences the cubic crystal structure of MgCo2O4 with space group Fd3m. The crystallites of pristine MgCo2O4 have an average size of 18.88 nm, as determined by Scherrer’s formula. It exhibits an increment of crystallite size from 18.88 nm to 21.60 nm with Cr ions substitution in the MgCo2O4 matrix. Halder–Wagner (H–W) technique reveals the parallel results of crystallite size followed by the inversed behavior of dislocation density and lattice strain. The study of FESEM illustrates the aggregation of spherical nanostructures with well-dispersed grains. UV–Vis spectroscopy depicts an enhancement in absorption accompanied by blue shift and increase in Egfrom 4.22 eV to 4.85 eV after Cr addition. Dielectric measurements have revealed that the dielectric constant is noticed to reduce with the introduction of Cr into the MgCo2O4 crystal framework. The electrical resistivity reduces after Cr impurity is incorporated into MgCo2O4 and has been found to decrease with increasing temperature. Impedance analysis has been carried out on MgCo2O4 and Cr-doped MgCo2O4, and it is observed that Cr doping improves the impedance.
format	article
author	Saurav Halder Karimul Hoque Tapash Chandra Paul Goshtha Gopal Biswas Md. Abdur Razzaque Sarker S.M. Naimul Mamun Md. Emran Hossain
author_facet	Saurav Halder Karimul Hoque Tapash Chandra Paul Goshtha Gopal Biswas Md. Abdur Razzaque Sarker S.M. Naimul Mamun Md. Emran Hossain
author_sort	Saurav Halder
title	Impact of Cr substitution on the structural, morphological, dielectric, and electrical properties of MgCo2O4 nanoparticles synthesized via solid-state reaction route
title_short	Impact of Cr substitution on the structural, morphological, dielectric, and electrical properties of MgCo2O4 nanoparticles synthesized via solid-state reaction route
title_full	Impact of Cr substitution on the structural, morphological, dielectric, and electrical properties of MgCo2O4 nanoparticles synthesized via solid-state reaction route
title_fullStr	Impact of Cr substitution on the structural, morphological, dielectric, and electrical properties of MgCo2O4 nanoparticles synthesized via solid-state reaction route
title_full_unstemmed	Impact of Cr substitution on the structural, morphological, dielectric, and electrical properties of MgCo2O4 nanoparticles synthesized via solid-state reaction route
title_sort	impact of cr substitution on the structural, morphological, dielectric, and electrical properties of mgco2o4 nanoparticles synthesized via solid-state reaction route
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/0ee96fdabdaf468eb49e8eafb5f16856
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Impact of Cr substitution on the structural, morphological, dielectric, and electrical properties of MgCo2O4 nanoparticles synthesized via solid-state reaction route

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