Ferrite Gas Sensors

Gadkari, Ashok B.; Shinde, Tukaram J.; Vasambekar, P. N.

doi:10.1109/jsen.2010.2068285

Cited by 135 publications

(48 citation statements)

References 83 publications

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“…In all cases a maximum sensitivity occurs in the case of NO 2 and O 3 , which competes with O 2 in forming negative surface ion species. [1,16,17]. It was established that highly sophisticated surface-related properties important for gas sensor applications such as optical, electronic, catalytic, mechanical, and chemical can be obtained by advanced nanocomposites synthesized from various materials.…”

Section: Binary Metal Oxidesmentioning

confidence: 99%

Material Design for Metal Oxide Chemiresistive Gas Sensors

Han¹,

Cho²

2013

Journal of Sensor Science and Technology

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This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License(http://creativecommons.org/licenses /bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. Journal of SensorScience and Technology Vol. 22, No. 1 (2013) pp. 1- AbstractMetal oxides designed for application in conductometric gas sensors and approaches used for synthesis of metal oxides with improved gas sensing characteristics are discussed in present article.

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Section: Binary Metal Oxidesmentioning

confidence: 99%

Material Design for Metal Oxide Chemiresistive Gas Sensors

Han¹,

Cho²

2013

Journal of Sensor Science and Technology

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“…The sensing properties of a solid solution sensor with a spinel structure, i.e., MFe 2 O 4 (M = divalent metal), have been evaluated using CO, CO 2 , CH 4 , C 2 H 5 OH, H 2 S, C 2 H 5 COOH, O 2 , H 2 , Cl 2 , NH 3 , CH 3 COOH, gasoline, acetylene, and liquid petroleum gas (LPG). (14) In the case of M = Ni, nickel ferrite was used for the first time as a sensor to detect a low concentration of chlorine gas. (15) In this study, the detection limit was 2 ppm.…”

Section: Introductionmentioning

confidence: 99%

Magnesium Ferrite Sensor for H2S Detection

2016

Sensors and Materials

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The composite effects of p-type MgO and n-type MgFe 2 O 4 on H 2 S detection were investigated. The mixture state of these oxides was fixed under coprecipitation conditions: mixture ratio of iron source to magnesium source, and pH control of precursor solution by dropping of an alkaline solution. The composite mixture of MgO, Fe 2 O 3 , and MgFe 2 O 4 was obtained by adjusting the mixture ratio of Fe to Mg. The resistance in air monotonically increased with increasing MgO content in the matrix of MgFe 2 O 4 . In contrast, the resistance in air decreased with increasing Fe 2 O 3 content. The sensing properties of these composites to 3 ppm H 2 S were evaluated as a sensor response (S), defined as the ratio of the resistance in air (R a ) to that in the gas mixture of H 2 S and air (R g ). The sensor response depended on the composite state of MgFe 2 O 4 and MgO because the amount of H 2 S adsorbed on the composite was increased by the formation of the p-n junction. In contrast, the sensor response was not improved in the presence of excess MgO in the matrix of MgFe 2 O 4 , suggesting that the excess MgO serves as an insulator in the electron transfer between the semiconductor composite MgO-MgFe 2 O 4 and an interdigitated Pt microelectrode.

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“…It is a solvent for various organic/ inorganic materials and also used in biomedical, chemical and food industries. The extensive use of ethanol in research and industries demands for a sensitive sensor for its leakage detection [1]. Materials with particle size in nanometer range, which have high surface activity due to their small particle size and large specific surface area, have been widely studied in the area of gas sensors for different applications [2,3].…”

Section: Introductionmentioning

confidence: 99%

Influence of Temperature on Reducing Gas Sensing Performance of Nanocrystalline Zinc Ferrite

Tyagi

Batra

Paul

2015

Trans Indian Inst Met

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Pure phase, zinc ferrite (ZnFe 2 O 4 ) nanoparticles were synthesized at lower temperature (80°C) by auto combustion synthesis method. The resulting 'as synthesized' powder was heat treated (HT) at 560°C for 2 h in air atmosphere. As-synthesized particles had sizes *10 nm with spherical shape. Further, these spherically shaped nanoparticles tended to change their morphology to hexagonal plate shape with increasing HT temperature. The band gap of the 'as synthesized' and HT zinc ferite, as determined by using UVVis spectroscopy were found to be 1.92 and 1.86 eV respectively. Gas responses of the ZnFe 2 O 4 nanoparticles were measured by exposing them to ethanol gas vapors. It was found that the zinc ferrite nanoparticles exhibited various sensing responses to ethanol gas at different operating temperature. The best sensitivity was observed at low temperature for 'as synthesized' ferrite nanoparticles than HT zinc ferrite nanoparticles. Sensing material that had smaller particle size and larger specific surface area was observed to have larger gas sensitivity and vice-versa.

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Ferrite Gas Sensors

Cited by 135 publications

References 83 publications

Material Design for Metal Oxide Chemiresistive Gas Sensors

Material Design for Metal Oxide Chemiresistive Gas Sensors

Magnesium Ferrite Sensor for H2S Detection

Influence of Temperature on Reducing Gas Sensing Performance of Nanocrystalline Zinc Ferrite

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