Cr-doped TiO2 gas sensor for exhaust NO2 monitoring

Ruiz, Ana; Sakai, Go; Cornet, A.; Shimanoe, Kengo; Morante, J.R.; Yamazoe, Noboru

doi:10.1016/s0925-4005(03)00183-7

Cited by 256 publications

(147 citation statements)

References 23 publications

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“…TiO 2 also shows good sensing properties to CO [4], ethanol [5], methane [6], etc. and have an advantage of being chemically stable at high temperatures which makes it a good candidate for gas sensing applications [7][8][9][10][11]. However, the main disadvantage of these gas sensors is the inability to distinguish between gases, but it has been reported that the selectivity could be improved by dopants [12].…”

Section: Introductionmentioning

confidence: 99%

Hydrogen gas sensors based on nanocrystalline TiO2 thin films

et al. 2011

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Abstract:Titanium dioxide thin films are extensively studied for applications in solid state gas sensor devices. Their gas sensing properties are strongly dependent on deposition technique, annealing temperature, film thickness and consequent properties like crystalline structure, grain size or amount of defects and impurities. In this work we report the gas sensing properties of TiO 2 thin films prepared by reactive magnetron sputtering technique and subsequently annealed at temperatures 600°C and 900°C. The films were exposed to different concentrations of H 2 gas up to 10 000 ppm. Their sensitivity to gas at various operating temperatures, ranging from 250°C to 450°C, was obtained by measuring their resistance. 07.07.Df, 68.47.Gh, 73.25.+i, 82.47 PACS (2008):

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Section: Introductionmentioning

confidence: 99%

Hydrogen gas sensors based on nanocrystalline TiO2 thin films

et al. 2011

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“…Titanium dioxide, TiO 2 , is useful in various applications ranging from pigments for paint [1,2] to dielectric, photovoltaic, [3] and gas sensor [4,5] applications. Recently, TiO 2 has gained much attention as the material of choice for environmental-related applications such as air purification, [6] water treatment, [7,8] and self cleaning [9] due to its photocatalytic properties, along with its stability and low cost.…”

Section: Introductionmentioning

confidence: 99%

Effects of Precipitation, SolGel Synthesis Conditions, and Drying Methods on the Properties of Nano‐TiO₂ for Photocatalysis Applications

et al. 2008

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A comparative study of TiO 2 powders prepared by precipitation and sol-gel methods was conducted. Titanium tetrachloride and titanium tetraisopropoxide were used as the starting materials for the precipitation and sol-gel processes, respectively. The effects of the two different drying methods, freeze drying and normal drying at 100°C, of the precipitates on the properties of the prepared TiO 2 powders were also investigated. The effects of the synthesis methods on phase, surface area, crystallite size, and photodegradation of methylene blue were studied by XRD, SEM, TEM, BET, and UV/ Vis techniques. It was found that the major phase of the synthesized TiO 2 was anatase, but small amounts of the brookite phase (Ͻ10 %) were found in some samples. The synthesized anatase TiO 2 with no pretreatment was found to be stable up to 600°C for the samples prepared by the precipitation

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“…The gas selectivity of metaloxide-based gas sensors can be improved by adding other metal oxides or dopants (Pt, Pd, Al, Cr, etc.) [3][4][5][6]. Following previous literatures, adding other metal oxides and dopants plays an important for promoting the specific gas sensing reaction by the spilled over effect [7,8].…”

Section: Introductionmentioning

confidence: 91%

Batch-processed semiconductor gas sensor array for the selective detection of NOx in automotive exhaust gas

Jang

Kim

2016

Micro and Nano Syst Lett

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This paper reports on a semiconductor gas sensor array to detect nitrogen oxides (NO x ) in automotive exhaust gas. The proposed semiconductor gas sensor array consisted of one common electrode and three individual electrodes to minimize the size of the sensor array, and three sensing layers [TiO 2 + SnO 2 (15 wt%), SnO 2 , and Ga 2 O 3 ] were deposited using screen printing. In addition, sensing materials were sintered under the same conditions in order to take advantage of batch processing. The sensing properties of the proposed sensor array were verified by experimental measurements, and the selectivity improved by using pattern recognition.

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Cr-doped TiO2 gas sensor for exhaust NO2 monitoring

Cited by 256 publications

References 23 publications

Hydrogen gas sensors based on nanocrystalline TiO2 thin films

Hydrogen gas sensors based on nanocrystalline TiO2 thin films

Effects of Precipitation, SolGel Synthesis Conditions, and Drying Methods on the Properties of Nano‐TiO₂ for Photocatalysis Applications

Batch-processed semiconductor gas sensor array for the selective detection of NOx in automotive exhaust gas

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Cr-doped TiO2 gas sensor for exhaust NO2 monitoring

Cited by 256 publications

References 23 publications

Hydrogen gas sensors based on nanocrystalline TiO2 thin films

Hydrogen gas sensors based on nanocrystalline TiO2 thin films

Effects of Precipitation, SolGel Synthesis Conditions, and Drying Methods on the Properties of Nano‐TiO2 for Photocatalysis Applications

Batch-processed semiconductor gas sensor array for the selective detection of NOx in automotive exhaust gas

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Effects of Precipitation, SolGel Synthesis Conditions, and Drying Methods on the Properties of Nano‐TiO₂ for Photocatalysis Applications