Structural and magnetic characterization of Co2+ substituted Ni-Zn ferrite nanoparticles synthesized by refluxing co-precipitation and their potential application as gas sensors

Dlamini, Sanele; Nkosi, Steven S.; Moyo, T.; Nhlapo, T.A.

doi:10.1016/j.mseb.2023.116554

Cited by 9 publications

(2 citation statements)

References 56 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…High sensitivity, selectivity, and short response and recovery times sensing a specific gas are the characteristics of a good sensor [107]. The response time of a gas sensor is described as the time taken by the sensor to attain 90% of its maximum resistance [108] if the sensor is exposed to an oxidizing gas medium since resistance would increase. However, if the sensor is exposed to a reducing gas medium its resistance would decrease [102], so the response time it is the time taken by the maximum initial resistance to be reduced by 90% attaining 10% of the maximum resistance.…”

Section: Lpg Gas Sensormentioning

confidence: 99%

Influence of samarium on the structural, magnetic, and gas sensing performance of cadmium zinc ferrites

Korek,

Habanjar,

Awad

2024

Phys. Scr.

View full text Add to dashboard Cite

Cadmium zinc ferrites Cd0.5Zn0.5SmxFe2-xO4 nanoparticles were synthesized with different concentrations x = 0.00, 0.01, 0.02, 0.04, 0.06, and 0.08, via the wet chemical co-precipitation method. The effects of the Sm3+ doping on the structural, morphological, compositional, and magnetic properties have been investigated. The structural analysis is performed using X-ray diffraction (XRD) with Rietveld refinement. The results indicate great crystallinity in the FCC Fd3m spinel structure of Cd0.5Zn0.5SmxFe2-xO4 nanoparticles. The crystallite size was estimated using Debye-Scherrer, Williamson–Hall, Size-strain plot (SSP), and Halder-Wagner (H-W) methods. It revealed a decreasing trend with the increase of Sm-doping concentrations until the solubility limit at around x = 0.04. The spherical morphology of the samples was investigated using transmission electron microscopy (TEM) with minor agglomeration as a benefit of using the capping agent polyvinylpyrrolidone (PVP). Raman spectroscopy validates the incorporation of trivalent Sm3+ in the octahedral sites. X-ray photoelectron spectroscopy (XPS) verified the elemental compositions as well as the purity of the samples and the incorporation of the dopants. A vibrating sample magnetometer (VSM) was used to study the magnetic properties, and which indicates the superparamagnetic behavior of the prepared samples. The prepared samples were tested as liquefied petroleum gas (LPG) sensors by studying their sensitivity, optimum working temperature, response time, and recovery time. The doping of samarium ions reveals a great increase in LPG sensing sensitivity and optimum temperature with decreasing response and recovery times.

show abstract

Section: Lpg Gas Sensormentioning

confidence: 99%

Influence of samarium on the structural, magnetic, and gas sensing performance of cadmium zinc ferrites

Korek,

Habanjar,

Awad

2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…Nanoscale ferromagnetic particles have garnered significant attention in both scientific research and practical applications due to their distinctive properties and diverse uses [1][2][3]. These particles find application in various fields, such as high-density magnetic storage devices [4], gas sensors [5], and spintronics [6], serving as essential components in microwave and nanowave devices [7]. Moreover, there has been a recent surge of interest in biocompatible nanosized magnetic materials [8], primarily within the medical and biological domains [9].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Reaction Medium pH on the Structure, Optical, and Mechanical Properties of Nanosized Cu-Fe Ferrite Synthesized by the Sol-Gel Autocombustion Method

Mazurenko,

Kaykan,

Sijo

et al. 2023

JNanoR

View full text Add to dashboard Cite

Nanoscale mixed ferrites with a spinel structure are highly versatile materials widely employed across diverse fields, including engineering, biomedicine, and ecology. This study explores the influence of pH on the structure, morphology, electrophysical, and mechanical properties of CuFe2O4 spinel, synthesized using the sol-gel self-combustion method. The investigation reveals that the pH level significantly impacts the structure formation, even at the gel formation stage, thereby shaping the subsequent structure and properties of the synthesized ferrite. X-ray diffraction (XRD) analysis demonstrates that the dominant phase (>90%) corresponds to the cubic spinel phase with the chemical formula CuFe2O4, belonging to the Fd3m space group. Notably, the pH of the reaction medium exerts a profound influence on the distribution of iron and copper ions within the octahedral and tetrahedral sublattices of the spinel structure. This variation in cationic distribution manifests in notable changes in the synthesized ferrite's magnetic, mechanical, and degradation properties. Furthermore, the study delves into the impact of the synthesized CuFe2O4 spinel as a photocatalyst for degrading organic dyes through the photo-Fenton process. It demonstrates that degradation efficiency is closely related to the ferrite's band gap width and particle size. This study aimed to determine how the pH of the reaction medium impacts the structure, morphology, optical, mechanical, and magnetic characteristics of the nanosized ferrites being synthesized. Furthermore, the synthesized materials were evaluated for their photocatalytic abilities in degrading organic dyes in water. The ferrite powders showcased remarkable dye degradation capabilities via the photo-Fenton process. Degradation efficiency largely hinged on the band gap width and the size of the particles. The most notable outcome was achieved with sample P1, which had particle sizes averaging 12.14 nm. By unraveling the complex relationship between pH, structure, and properties, this research enhances our understanding of the design and optimization of nanoscale mixed ferrites.

show abstract

Studies on sol–gel autocombustion processed Ni–Zn–Mg ferrite system: effect of calcination temperature, thermoelectric power, and gas sensing application

Sathe,

Narayankar,

Patil

et al. 2024

J Mater Sci: Mater Electron

View full text Add to dashboard Cite

Structural and magnetic characterization of Co2+ substituted Ni-Zn ferrite nanoparticles synthesized by refluxing co-precipitation and their potential application as gas sensors

Cited by 9 publications

References 56 publications

Influence of samarium on the structural, magnetic, and gas sensing performance of cadmium zinc ferrites

Influence of samarium on the structural, magnetic, and gas sensing performance of cadmium zinc ferrites

The Influence of Reaction Medium pH on the Structure, Optical, and Mechanical Properties of Nanosized Cu-Fe Ferrite Synthesized by the Sol-Gel Autocombustion Method

Studies on sol–gel autocombustion processed Ni–Zn–Mg ferrite system: effect of calcination temperature, thermoelectric power, and gas sensing application

Contact Info

Product

Resources

About