Gas sensitivity of semiconductor Fe2O3-based thick-film sensors to CH4, H2, NH3

Малышев, В. В.; Eryshkin, A.V.; Koltypin, E.A.; Varfolomeev, E.A.; Vasiliev, Alexey

doi:10.1016/0925-4005(93)01031-x

Cited by 26 publications

(8 citation statements)

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“…We have considered a literary review of works and publications on the gas-sensitive characteristics of various sensor structures in gas mixtures of air with hydrogen [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19]. The interest of authors of the works has been concentrated on the search of catalytic additives to tin dioxide and search of new semiconductive metal oxides.…”

Section: Introductionmentioning

confidence: 99%

Investigation of gas-sensitivity of sensor structures to hydrogen in a wide range of temperature, concentration and humidity of gas medium

Малышев

Pislyakov

2008

Sensors and Actuators B: Chemical

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Investigation of gas-sensitivity of sensor structures to hydrogen in a wide range of temperature, concentration and humidity of gas medium a b s t r a c t Response to H 2 of seven sensor structures of SnO 2 with various catalytic additives, made by thick-film technology, was investigated in a dry gas medium at a concentration of 200 ppm H 2 in a temperature range of 100-600 • C. Concentration dependence of six sensors (pure SnO 2 and doped with five catalytic additives: 3% Pd, 3% La 2 O 3 , 1% Pt + 3% Pd, 1% Sb 2 O 5 + 3% La 2 O 3 and 3% Pd with a support layer from Al 2 O 3 ) was investigated in a range of 1-19,700 ppm H 2 of different relative humidity (RH) in a range of 0-100% RH at two operating temperatures. The resistance and response of the sensors weakly depended on the humidity of the gas medium at RH ≥ 0 or 10%. Arithmetic mean values of response and resistance in the range of 0 (10)-100% RH were approximated by linear functions of log(S ma − 1) = B + n log C and log R ma = A + k log C, respectively.Based on the comparative analysis of experimental data (response to H 2 , reproducibility of indications, influence of humidity on the resistance and response, response threshold and a resistance drift in pure air), the best for H 2 detection were the two sensor structures of pure SnO 2 and SnO 2 + 3% La 2 O 3 , working at temperatures 500 • C and 450 • C, respectively. Formulas for resistance and response of these sensors were presented, which allowed estimation of H 2 concentration in air based on the measured parameters. Reproducibility of indications in the range of 1-19,700 ppm H 2 was within 4-10%. The response threshold was 0.08 ± 0.006 ppm H 2 in the mentioned range of humidity at the response equal to 1.1.The interpretation was given for the mechanism of interaction of H 2 with the catalytic surface of semiconductive sensors. The present sensors can be recommended as the primary transducer of H 2 concentration in air for the gas control devices.

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Section: Introductionmentioning

confidence: 99%

Investigation of gas-sensitivity of sensor structures to hydrogen in a wide range of temperature, concentration and humidity of gas medium

Малышев

Pislyakov

2008

Sensors and Actuators B: Chemical

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“…In some recent interesting works, the very stable α-Fe 2 O 3 oxide or hematite has n-type semiconducting properties (Eg = 2.1 eV) prepared for use in gas sensor devices [16,63]. For potential applications in stable and highly sensitive gas-sensor devices, α-Fe 2 O 3 nanoparticles with high durability and stability can be synthesized in a largescale production (low cost) for gas-sensor materials for detection of hydrogen (H 2 ), CO, toluene (C 6 H 5 CH 3 ), propane (C 3 H 8 ), C 2 H 5 OH, and liquid petroleum gas (LPG), acetone, and NH 3 , respectively.…”

Section: New Large Polyhedral α-Fe 2 O 3 Oxide Nanoparticlesmentioning

confidence: 99%

“…For p-type material, the reducing gases extract holes from the oxide material, and hence the conductance is reduced [1][2][3][4][5][6][7][8]. Typically, various materials have been reported for use in semiconductor gas sensors, such as SnO 2 (n-type) [9], TiO 2 (n-type) [10], ZnO (n-type) [11], In 2 O 3 (n-type) [12], WO 3 (n-type) [13][14][15], α-Fe 2 O 3 (n-type) [16], α-Fe 2 O 3 (n-type) [17], carbon nanotube (p-type) [18,19], Co 3 O 4 (p-type) [20], V 2 O 5 (p-type) [21], CuO (p-type) [22], and etc. Among them, α-Fe 2 O 3 has very large potential for practical use in gas sensors due to its high sensitivity, high stability and sensitivity to various gases, especially toxic gases [23,24,70].…”

Section: Introductionmentioning

confidence: 99%

“…A large number of n-and p-type nano-oxides have been widely investigated for their gas-sensing properties. Among them, Sn and Fe oxides have proven superior for practical application as gas sensing materials films [9,16,17,44]. Additionally, there are various perovskites with the general formula ABO 3 , typically as SrTiO 3 and SrTi (1-x) Fe x O 3 that are promising candidates for high-temperature sensors to detect NO 2 , CO, and CH 4 , respectively [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Iron Oxide Nanoparticles for Next Generation Gas Sensors

Long¹,

Teranishi²,

Yang³

et al. 2015

Int J Metall Mater Eng

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“…The ␣-Fe 2 O 3 and metal doped composites have been found to be sensitive to many gases including CO, CH 4 , H 2 , and humidity (He et al, 1997;Nakatani and Matsuoka, 1982;Cantalini and Pelino, 1992;Malyshev et al, 1994;Seiyama, 1989). In addition, the catalytic CO oxidation is practically important in the purification of engine exhaust gases and of hydrogen produced by steam reforming of methanol and hydrocarbons for polymer electrolyte fuel cells (Sanchez et al, 1997).…”

Section: Measurements Of Catalytic Activitymentioning

confidence: 97%

Synthesis of Pd/α-Fe2O3 nanocomposites for catalytic CO oxidation

Jiang

2009

Journal of Materials Processing Technology

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Gas sensitivity of semiconductor Fe2O3-based thick-film sensors to CH4, H2, NH3

Cited by 26 publications

References 1 publication

Investigation of gas-sensitivity of sensor structures to hydrogen in a wide range of temperature, concentration and humidity of gas medium

Investigation of gas-sensitivity of sensor structures to hydrogen in a wide range of temperature, concentration and humidity of gas medium

Iron Oxide Nanoparticles for Next Generation Gas Sensors

Synthesis of Pd/α-Fe2O3 nanocomposites for catalytic CO oxidation

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