In2O3 and Pt-In2O3 nanopowders for low temperature oxygen sensors

Neri, G.; Bonavita, A.; Micali, Giuseppe; Rizzo, Giuseppe; Pinna, Nicola; Niederberger, Markus

doi:10.1016/j.snb.2007.04.046

Cited by 97 publications

(51 citation statements)

References 27 publications

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“…In the present case with a sensing temperature of 25-100°C, the preferred species will be O 2 -or O - [28]. [29], the electrons will be extracted from the Sb 2 O 5 surface. These reactions will consequently form the hole accumulation region on the p-type Sb 2 O 5 surface.…”

Section: Resultsmentioning

confidence: 88%

Synthesis and room-temperature NO2 sensing properties of Sb2O5 nanowires

Kim

Kwon

et al. 2015

Met. Mater. Int.

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The sensing properties of Sb2O5 nanowires are reported for the first time. By varying the heating temperature of a mixture of Sb and Bi powders, we have successfully prepared Sb2O5 nanowires. For nanowires grown at 600°C, the stem is mainly comprised of a monoclinic Sb2O5 phase, with a trace amount of a monoclinic Bi2O3 phase. The existence of Au nanoparticles at the tips suggests that the 600°C-synthesized nanowires are mainly grown via a vapor-liquid-solid process. The 500°C-grown products comprise a small amount of 1D nanostructures, whereas the 700°C-grown product does not exhibit sufficiently thin 1D nanostructures. A representative A survey XPS spectrum exhibits several peaks, including Sb 3p, Sb 3d, O 1s, C 1s, Bi 4f, and Sb 4d. At room temeperature, the sensor response, response time, and recovery time of the nanowires were measured to be 1.20, 2104 s, and 6579 s, respectively. Sensor measurements employing NO2 gas indicate that the Sb2O5 nanowires synthesized in this work have potential for use as a room-temperature NO2 chemical gas sensors.

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Section: Resultsmentioning

confidence: 88%

Synthesis and room-temperature NO2 sensing properties of Sb2O5 nanowires

Kim

Kwon

et al. 2015

Met. Mater. Int.

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“…Since the hard template is usually synthesized in a preceding (soft or hard) templating procedure, the entire process can be envisaged as ''repeated templating''. [1] Indium oxide is a promising material for application as a sensor for various oxidizing gases, such as O 3 , [23][24][25][26] O 2 , [27] or nitric oxides, [24,25,28] as well as for reducing gases like CO or H 2 . [29,30] The principle of semiconducting metal oxide gas sensors is based on surface-chemical interaction between gas molecules and the crystalline sensor material.…”

Section: Introductionmentioning

confidence: 99%

Ordered Mesoporous In₂O₃: Synthesis by Structure Replication and Application as a Methane Gas Sensor

Waitz

Wagner

Sauerwald

et al. 2009

Adv Funct Materials

308

184

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The synthesis and characterization of ordered mesoporous In2O3 materials by structure replication from hexagonal mesoporous SBA‐15 silica and cubic KIT‐6 silica is presented. Variation of the synthesis parameters allows for different pore sizes and pore wall thicknesses in the products. The In2O3 samples turn out to be stable up to temperatures between 450 °C and 650 °C; such high thermal stability is necessary for their application as gas sensors. Test measurements show a high sensitivity to methane gas in concentrations relevant for explosion prevention. The sensitivity is shown to be correlated not only with the surface‐to‐volume ratio, but also with the nanoscopic structural properties of the materials.

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“…Different materials that have been investigated for this application including Ga2O3 [3], SnO2 [4], TiO2 [5], ZnO [6], In2O3 [7]. Among these materials, the latter has been reported to have a high sensitivity toward oxygen at low temperatures due to its high conductivity [8].…”

Section: Introductionmentioning

confidence: 99%

Oxygen Sensors Based on Screen Printed Platinum and Palladium Doped Indium Oxides

Sari

Smith²,

Leigh

et al. 2017

Proceedings of Eurosensors 2017, Paris, France, 3–6 September 2017

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Platinum and palladium doped indium oxide sensors have been successfully fabricated by a screen printing method and tested as oxygen sensors at low temperature (150-400 °C) in a humid environment (~80-85% RH). The sensors, complying with a power law relationship, showed good differentiation at lower temperatures with highest response observed at 200 °C. Platinum had sensitivity of 2.2% per %O2 and power law exponent α = 0.72 vs. 0.3% per %O2 for palladium with power law exponent α = 0.51. Overall, the response of platinum doped indium oxide was higher than the palladium doped version.

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In2O3 and Pt-In2O3 nanopowders for low temperature oxygen sensors

Cited by 97 publications

References 27 publications

Synthesis and room-temperature NO2 sensing properties of Sb2O5 nanowires

Synthesis and room-temperature NO2 sensing properties of Sb2O5 nanowires

Ordered Mesoporous In₂O₃: Synthesis by Structure Replication and Application as a Methane Gas Sensor

Oxygen Sensors Based on Screen Printed Platinum and Palladium Doped Indium Oxides

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In2O3 and Pt-In2O3 nanopowders for low temperature oxygen sensors

Cited by 97 publications

References 27 publications

Synthesis and room-temperature NO2 sensing properties of Sb2O5 nanowires

Synthesis and room-temperature NO2 sensing properties of Sb2O5 nanowires

Ordered Mesoporous In2O3: Synthesis by Structure Replication and Application as a Methane Gas Sensor

Oxygen Sensors Based on Screen Printed Platinum and Palladium Doped Indium Oxides

Contact Info

Product

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Ordered Mesoporous In₂O₃: Synthesis by Structure Replication and Application as a Methane Gas Sensor