Ferrite application as an electrochemical sensor: A review

Ranga, Rohit; Kumar, Ashok; Kumari, Parveen; Singh, Permender; Madaan, Vasundhara; Kumar, Krishan

doi:10.1016/j.matchar.2021.111269

Cited by 73 publications

(24 citation statements)

References 122 publications

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“…A series of single-phase CoFe 2 O 4 powder with different W-doping (0.0 ≤ x ≤ 0.15) was synthesized by a sol-gel method using citric acid as a complexant. Analytical grade Cobalt (II) nitrate hexahydrate Co (NO 3 ) 2 .6H 2 O, Iron (III) nitrate nonahydrate Fe (NO 3 ) 3 .9H 2 O, and Citric acid HOC (CO 2 H) (CH 2 CO 2 H) 2 were placed in a molar ratio of 1:2:3, with Tungstic acid H 2 WO 4 as a source of W were all obtained from Sigma-Aldrich, doubledeionized water was used for preparing all solutions. The sol-gel synthesis process started with the homogenous solution of metal soluble salts and proceeded with the formation of a stable sol.…”

Section: Materials and Preparation Routementioning

confidence: 99%

“…Industrial growth provoked atmospheric pollution, which induced the public and the scientific community to find better detection devices [1]. Research into gas and volatile liquid sensors is one of the main research topics targeting safety in the industrial and the environmental sectors [2]. The sensing mechanism involves changing the properties of materials with an analyte concentration [3].…”

Section: Introductionmentioning

confidence: 99%

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The Structure, Magnetic, and Gas Sensing Characteristics of W-Substituted Co-Ferrite Nanoparticles

et al. 2022

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Ferrites have been broadly investigated as gas sensors. The present article reports on the synthesis of Co-ferrite doped with W ions and their gas sensing abilities. A series of single phase CoFe2O4 powder with different W-doping (0.0 ≤ x ≤ 0.15) was synthesized using sol-gel synthesis. A variation in the saturation magnetization (Ms) and the lattice dimension with W(VI) substitution was associated with a change in the distribution of Fe (III) ions between tetrahedral and octahedral sites. Introducing W (VI) ions into the spinel lattice induced the rearrangement of Fe (III) ions. The total Ms increased with W-doping up to x = 0.05 (Ms = 50.1 Am2/kg) and it dramatically decreased to 34.6 Am2/kg with x = 0.15 of doping. However, the lattice parameter increased with increasing doping levels. Different W-doped CoFe2O4 were examined for a gas sensing response in the temperature range of 200–450 °C. Comparing the sensor responses to various reducing gases, the material’s response was shown to be sensitive and selective for acetone. The addition of W (0.15%) had a significant impact on the response and on the operating temperature of the sensor material, indicating that it might be used as an acetone sensor.

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Section: Materials and Preparation Routementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The Structure, Magnetic, and Gas Sensing Characteristics of W-Substituted Co-Ferrite Nanoparticles

et al. 2022

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“…Pristine and doped MgFe 2 O 4 , ZnFe 2 O 4 , CuFe 2 O 4 , and NiFe 2 O 4 are some of the extensively studied spinel ferrites in gas sensing applications. Sensing of CH 4 , NO 2 , H 2 S, Cl 2 , C 2 H 5 OH, and liquefied petroleum gas (LPG) is reported by various research groups. − The application of MnFe 2 O 4 , Fe 3 O 4 , CoFe 2 O 4 , and ZnFe 2 O 4 as electrochemical sensors is also well-known. , A samarium-doped cobalt ferrite has been reported as conductometric sensor for detecting hydrogen . Spinel ferrites have demonstrated their effective use as biosensors as well.…”

Section: Introductionmentioning

confidence: 99%

Wet Chemical Synthesis of Cubic Spinel Ferrites: A Review Addressing Phase Formation Behavior and Nanostructuring

Baruah,

Mukherjee,

Bhagat

et al. 2024

Crystal Growth & Design

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Spinel ferrites, an important class of complex oxides, are imperative worldwide for their well-known magnetic, electrical, optical, catalytic properties, which led tem to be useful in various applications. These can be prepared through various solid state, physical, and wet chemical methods. One difficulty associated with the preparation of complex compositions of spinel ferrite (e.g., AB 2 O 4 where A and B are two different metal cations with +2 and +3 valence states, respectively) is the fact that often individual metal oxides are obtained as impurities with the desired composition. Mostly, the spinel ferrites crystallize into cubic phase, which makes these isotropic oxides difficult to grow in 1D structures like other anisotropic oxides such as hexagonal zinc oxide and tetragonal titania. Existing reports have mostly overlooked the aforementioned challenges for the synthesis of spinel ferrites. Viewing in the same line, in the present Review, we have reviewed different wet chemical approaches for the synthesis of spinel ferrites and made an attempt to correlate the phase formation behavior, composition, and morphology with the synthesis procedure. In addition, the procedures and mechanisms for the synthesis of phase-pure 1D spinel ferrites are also described. This Review offers comprehensive insight for researchers keen on delving into the synthesis and diverse applications of cubic spinel ferrites.

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“…]. [5,20] Electrons do not hop via superexchange interactions of [Fe 2+ ]-O-(Fe 3+ ) because of antiparallel spin configurations. Electron hopping between tetrahedral sites does not occur as they lack shared oxygen and have a long hopping distance.…”

Section: Introductionmentioning

confidence: 99%

Electrical Effects of Ionic Deficient Cubic Ferrite Spinels: A Case Study on MgFe₂O₄

Farshidfar,

Oreskovic,

Ryan

et al. 2023

Advanced Physics Research

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Electron transport via indirect exchange interactions between octahedral sites in spinels is affected by cationic or anionic vacancies. Thus, the deviation of the electron hopping mechanism is investigated, from a constant energy barrier toward a variable range energy barrier in iron‐deficient and oxygen‐deficient cubic magnesium ferrite spinels. Variable range electron hopping activation energy at high temperatures is consistent with the modified cation–anion interactions in the distorted structure of an ionic deficient cubic magnesium ferrite spinel. For these observations, an instrumental method is developed to evaluate the electron exchange interactions and general redox kinetics on surfaces, managed by exposure to the flow of a wide variety of desired gases. The applications of this instrument are far beyond the example studies reported here.

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Ferrite application as an electrochemical sensor: A review

Cited by 73 publications

References 122 publications

The Structure, Magnetic, and Gas Sensing Characteristics of W-Substituted Co-Ferrite Nanoparticles

The Structure, Magnetic, and Gas Sensing Characteristics of W-Substituted Co-Ferrite Nanoparticles

Wet Chemical Synthesis of Cubic Spinel Ferrites: A Review Addressing Phase Formation Behavior and Nanostructuring

Electrical Effects of Ionic Deficient Cubic Ferrite Spinels: A Case Study on MgFe₂O₄

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Ferrite application as an electrochemical sensor: A review

Cited by 73 publications

References 122 publications

The Structure, Magnetic, and Gas Sensing Characteristics of W-Substituted Co-Ferrite Nanoparticles

The Structure, Magnetic, and Gas Sensing Characteristics of W-Substituted Co-Ferrite Nanoparticles

Wet Chemical Synthesis of Cubic Spinel Ferrites: A Review Addressing Phase Formation Behavior and Nanostructuring

Electrical Effects of Ionic Deficient Cubic Ferrite Spinels: A Case Study on MgFe2O4

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Electrical Effects of Ionic Deficient Cubic Ferrite Spinels: A Case Study on MgFe₂O₄