Insightful acetone gas sensing behaviour of Ce substituted MgFe2O4 spinel nano-ferrites

Mkwae, Prince S.; Kortidis, Ioannis; Kroon, R.E.; Leshabane, Nompumelelo; Jozela, Mudalo; Swart, H.C.; Nkosi, Steven S.

doi:10.1016/j.jmrt.2020.11.079

Cited by 32 publications

(10 citation statements)

References 55 publications

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“…the core level XPS 2p peak positioned at 53.25 eV represents the magnesium in the ferrite lattice. 40 The peak at 55.25 eV is attributed to the hydroxylated lithium/lithium oxide on the surface of the material (Figure 2b). 41 Two peaks located at 714 and 727.82 eV were associated with Fe 2p 3/2 and Fe 2p 1/2 , respectively, with a separation of 13.82 eV indicative of the presence of the Fe 3+ state of iron in the synthesized sample (Figure 2c).…”

Section: Resultsmentioning

confidence: 99%

A Sustainable and Regenerative Process for the Treatment of Textile Effluents Using Nonphotocatalytic Water Splitting by Nanoporous Oxygen-Deficient Ferrite

Shukla,

Shah,

Badola

et al. 2024

ACS Omega

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Water is crucial for life. Being the world's third-largest industry, the textile industry pollutes 93 billion cubic meters of water each year. Only 28% of textile wastewater is treated by lower-to middle-income countries due to the costly treatment methods. The present work demonstrates the utilization of surface oxygen defects and nanopores in Mg 0.8 Li 0.2 Fe 2 O 4 (Li-MgF) to treat textile effluents by a highly economical, scalable, and eco-friendly process. Nanoporous, oxygen-deficient Li-MgF splits water by a nonphotocatalytic process at room temperature to produce green electricity as hydroelectric cell. The adsorbent Li-MgF can be easily regenerated by heat treatment. A 70−90% reduction in the UV absorption intensity of adsorbent-treated textile effluents was observed by UV− visible spectroscopy. The oxygen defects on Li-MgF surface and nanopores were confirmed by X-ray photoelectron spectroscopy and Brunauer−Emmett−Teller (BET) measurements, respectively. To analyze the adsorption mechanism, three known organic water-soluble dyes, brilliant green, crystal violet, and congo red, were treated with nanoporous Li-MgF. The dye decolorization efficiency of Li-MgF was recorded to be 99.84, 99.27, and 99.31% at 250 μM concentrations of brilliant green, congo red, and crystal violet, respectively. The results of Fourier transform infrared (FTIR) spectroscopy confirmed the presence of dyes on the material surface attached through hydroxyl groups generated by water splitting on the surface of the material. Total organic carbon analysis confirmed the removal of organic carbon from the dye solutions by 82.8, 77.0, and 46.5% for brilliant green, Congo red, and crystal violet, respectively. Based on the kinetic and isotherm models, the presence of a large number of surface hydroxyl groups on the surface of the material and OH − ions in solutions generated by water splitting was found to be responsible for the complete decolorization of all of the dyes. Adsorption of chemically diverse dyes by the nanoporous, eco-friendly, ferromagnetic, economic, and reusable Li-MgF provides a sustainable and easy way to treat textile industry effluents in large amounts.

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Section: Resultsmentioning

confidence: 99%

A Sustainable and Regenerative Process for the Treatment of Textile Effluents Using Nonphotocatalytic Water Splitting by Nanoporous Oxygen-Deficient Ferrite

Shukla,

Shah,

Badola

et al. 2024

ACS Omega

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“…A unique and promising approach to diagnosis involves measuring the amount of acetone in the breath of persons with diabetes using a fast chemiresistive sensor. 9 Additionally, the amount of acetone exhaled by people with diabetes is up to 1.8 ppm, which is significantly higher than the amount of acetone exhaled by someone in a healthy state, which ranges from 0.3 to 0.9 ppm. 10,11 Because it provides a noninvasive and potentially economical way to diagnose sickness, the measurement of volatile organic compounds in exhaled breath samples offers a major advancement in medical diagnosis.…”

Section: Introductionmentioning

confidence: 95%

“…Breath analysis for noninvasive clinical diagnosis and therapy progression has gained popularity in the research community as a result of developments in novel sensing nanomaterials. A unique and promising approach to diagnosis involves measuring the amount of acetone in the breath of persons with diabetes using a fast chemiresistive sensor . Additionally, the amount of acetone exhaled by people with diabetes is up to 1.8 ppm, which is significantly higher than the amount of acetone exhaled by someone in a healthy state, which ranges from 0.3 to 0.9 ppm. , Because it provides a noninvasive and potentially economical way to diagnose sickness, the measurement of volatile organic compounds in exhaled breath samples offers a major advancement in medical diagnosis. , Clinical trials using spectrometry and spectroscopy, the gold standard techniques for volatile-compound detection, have shown promise for breath testing.…”

Section: Introductionmentioning

confidence: 99%

2D/2D Nanostructured System Based on WO₃/WS₂ for Acetone Sensor and Breath Analyzer

Verma

Yadav

2023

ACS Appl. Nano Mater.

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The main aim of this research investigation is to evaluate the acetone-sensing performance of the heterostructured nanohybrid of WO3/WS2 by its constituents, two-dimensional (2D), WO3 and WS2 for use in biomedical to industrial-level utilization. Using a rapid chemiresistive sensor to examine the level of acetone in an individual’s exhaled breath shows potential for identifying diabetes in humans. The prepared nanosheets were characterized by X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), X-ray diffraction (XRD) pattern, UV–visible spectroscopy, and Fourier transform infrared (FTIR) analysis. XPS results confirm the presence of W4+ and W6+ oxidation states with overlapped peaks, revealing the formation of a 2D/2D nanosheet-like system of the WO3/WS2 heterostructure. Sensing results show sensor responses of 132.5 and 17.0 at acetone concentrations of 1000 and 1 ppm, respectively, signifying the utilization of this sensor device for biomedical and industrial-scale applications. The limit of detection (LOD) for the biomedical range was found to be 1.54 ppm, whereas for the industrial scale, the LOD was found to be 21.02 ppm. Exhaled breath-based analysis suggests that this sensing device can also be employed for continuous exhaled breath monitoring. For example, a WO3/WS2-based heterostructured device shows a sensor response of 98.7 to exhaled breath containing only 8 vol %, demonstrating excellent capability for continuous breath monitoring. Density functional theory (DFT) predicts the reason behind the selective detection of acetone with a sensor response of 46.98%.

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“…Their detection principle is based on the change in conductivity upon interaction with a chemical species at the sensor surface, which is generally transition metal ferrites (e.g., Mn, Mg, Zn, Ni, Co, and Cd) with an AB 2 O 4 formula [5][6][7][8][9][10][11][12][13]. We quote the term "easy production" as one of its merits, amongst all the adopted synthetic routes, because the glycine combustion process is a highly promising route because of several factors.…”

Section: Introductionmentioning

confidence: 99%

Spinel Magnesium Ferrite (MgFe2O4): A Glycine-Assisted Colloidal Combustion and Its Potentiality in Gas-Sensing Application

Nadargi

Umar

Nadargi³

et al. 2022

Chemosensors

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Herein, we describe the facile synthesis of spinel MgFe2O4 ferrite and its potential use as a gas sensor using a straightforward and reliable sol–gel approach, i.e., the glycine-assisted auto-combustion route. The novelty in obtaining the sensing material via the auto-combustion route is its inherent simplicity and capability to produce the material at an industry scale. The said cost-effective process makes use of simple metal salts (Mg and Fe-nitrates) and glycine in an aqueous solution, which leads to the formation of spinel MgFe2O4 ferrite. A single-phase crystallinity with crystallite sizes ranging between 36 and 41 nm was observed for the synthesized materials using the X-ray diffraction (XRD) technique. The porous morphologies of the synthesized materials caused by auto-ignition during the combustion process were validated by the microscopic investigations. The EDS analysis confirmed the constituted elements such as Mg, Fe, and O, without any impurity peaks. The gas-sensing ability of the synthesized ferrites was examined to detect various reducing gases such as LPG, ethanol, acetone, and ammonia. The ferrite showed the highest response (>80%) toward LPG with the response and recovery times of 15 s and 23 s, respectively. Though the sensor responded low toward ammonia (~30%), its response and recovery times were very quick, i.e., 7 s and 9 s, respectively. The present investigation revealed that the synthesized ferrite materials are good candidates for fabricating high-performance sensors for reducing gases in real-world applications.

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Insightful acetone gas sensing behaviour of Ce substituted MgFe2O4 spinel nano-ferrites

Cited by 32 publications

References 55 publications

A Sustainable and Regenerative Process for the Treatment of Textile Effluents Using Nonphotocatalytic Water Splitting by Nanoporous Oxygen-Deficient Ferrite

A Sustainable and Regenerative Process for the Treatment of Textile Effluents Using Nonphotocatalytic Water Splitting by Nanoporous Oxygen-Deficient Ferrite

2D/2D Nanostructured System Based on WO₃/WS₂ for Acetone Sensor and Breath Analyzer

Spinel Magnesium Ferrite (MgFe2O4): A Glycine-Assisted Colloidal Combustion and Its Potentiality in Gas-Sensing Application

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Insightful acetone gas sensing behaviour of Ce substituted MgFe2O4 spinel nano-ferrites

Cited by 32 publications

References 55 publications

A Sustainable and Regenerative Process for the Treatment of Textile Effluents Using Nonphotocatalytic Water Splitting by Nanoporous Oxygen-Deficient Ferrite

A Sustainable and Regenerative Process for the Treatment of Textile Effluents Using Nonphotocatalytic Water Splitting by Nanoporous Oxygen-Deficient Ferrite

2D/2D Nanostructured System Based on WO3/WS2 for Acetone Sensor and Breath Analyzer

Spinel Magnesium Ferrite (MgFe2O4): A Glycine-Assisted Colloidal Combustion and Its Potentiality in Gas-Sensing Application

Contact Info

Product

Resources

About

2D/2D Nanostructured System Based on WO₃/WS₂ for Acetone Sensor and Breath Analyzer