Low-temperature capacitive sensor based on perovskite oxides

Zaza, F.; Orio, G.; Serra, Emanuele; Caprioli, Fabrizio; Pasquali, Marco

doi:10.1063/1.4922560

Cited by 12 publications

(8 citation statements)

References 36 publications

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“…On the contrary, high responses to H 2 S by utilization of pure ST films have been reported by the same group [80]; in this paper, the SrTiO 3 nanomaterial was synthesized using a sol-gel hydrothermal method and exhibited an outstanding gas sensor response (S > 500) at a lower temperature, 150 • C, to 80 ppm of H 2 S [80]. The possibility to detect another carbon oxide, CO 2 , was verified by Zaza et al [81], in 2015. The authors presented the results of a room-operated SrTiO 3 -based sensor.…”

Section: Srtio 3 For Gas-sensing Applicationsmentioning

confidence: 65%

“…The authors presented the results of a room-operated SrTiO 3 -based sensor. However, because of the low recovery rate, the regeneration of the sensor has to be made at high temperature for promoting the decomposition of the carbonates formed on the perovskite surface, which significantly reduce the advantage of operation at room temperature [81]. ST-based gas sensors have also been tested under exposure to volatile organic compounds (VOC), such as ethanol.…”

Section: Srtio 3 For Gas-sensing Applicationsmentioning

confidence: 99%

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Semiconducting Metal Oxides: SrTiO3, BaTiO3 and BaSrTiO3 in Gas-Sensing Applications: A Review

et al. 2021

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In this work, a broad overview in the field of strontium titanate (ST, SrTiO3)-, barium titanate (BT, BaTiO3)- and barium strontium titanate (BST, BaSrTiO3)-based gas sensors is presented and discussed. The above-mentioned materials are characterized by a perovskite structure with long-term stability and therefore are very promising materials for commercial gas-sensing applications. Within the last 20 years, the number of papers where ST, BT and BST materials were tested as gas-sensitive materials has ten times increased and therefore an actual review about them in this field has been expected by readers, who are researchers involved in gas-sensing applications and novel materials investigations, as well as industry research and development center members, who are constantly searching for gas-sensing materials exhibiting high 3S parameters (sensitivity, selectivity and stability) that can be adapted for commercial realizations. Finally, the NO2-sensing characteristics of the BST-based gas sensors deposited by the authors with the utilization of magnetron sputtering technology are presented.

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Section: Srtio 3 For Gas-sensing Applicationsmentioning

confidence: 65%

Section: Srtio 3 For Gas-sensing Applicationsmentioning

confidence: 99%

Semiconducting Metal Oxides: SrTiO3, BaTiO3 and BaSrTiO3 in Gas-Sensing Applications: A Review

et al. 2021

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“…In particular, in this case the influence of citric acid to metal ions ratio on the crystallization phase is minimized by more affecting synthesis conditions, even if it is crucial for the metal complexation and, thus, for the perovskite formation. Nevertheless, the significance of the cross-term b 12 demonstrates that the two considered factors are correlated each other, being the amount of citric acid affected both from CA/M and fuel to oxidizer ratio and, thus, from Φ parameter. All of these considerations are confirmed by the response surface plot of Fig.…”

Section: Resultsmentioning

confidence: 99%

Perovskite sensing materials for syngas composition monitoring and biomass gasifier numerical model validation: A preliminary approach

Pallozzi¹,

Carlo²,

Zaza³

et al. 2016

AIP Conference Proceedings

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Abstract. Biomass gasification represents a suitable choice for global environmental impact reduction, but more efforts on the process efficiency need to be conducted in order to enhance the use of this technology. Studies on inputs and outputs of the process, as well as measurements and controls of syngas composition and correlated organic and inorganic impurities, are crucial points for the optimization of the entire process: models of the system and sensing devices are, thus, very attractive for this purpose. In particular, perovskite based chemoresistive sensors could represent a promising technology, since their simplicity in function, relatively low cost and direct high temperature operation. The aim of this work is to develop a steam fluidized bed biomass gasifier model, for the prediction of the process gas composition, and new perovskite compounds, LaFeO 3 based, as sensing material of chemoresistive sensors for syngas composition and impurities measurements. Chemometric analysis on the combustion synthesis via citrate-nitrate technique of LaFeO 3 was also performed, in order to evaluate the relationship between synthesis conditions and perovskite materials and, thus, sensor properties. Performance of different sensors will be tested, in next works, with the support of the developed gasifier model.

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“…Since almost all elements are stable in perovskite structure because of their suitable size and charge, a large number of compounds can be synthesized. For this reason, it is possible to design and synthesize perovskite oxides with the most suitable chemical composition and stoichiometry in order to develop sensing material for detecting specific target gas under specific working temperature [13,14].…”

Section: Introductionmentioning

confidence: 99%

Optimization of Working Conditions for Perovskite-Based Gas Sensor Devices by Multiregression Analysis

Zaza

Pallozzi

Serra

2019

Journal of Nanotechnology

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Environmental degradation and resource depletion drive scientific research priorities to develop technologies for sustainable productive systems. Among them, chemical sensing technology plays a key role for regulating energetic, ecological, and productive efficiency by monitoring and controlling the industrial processes. Semiconducting metal oxide sensors are particularly attractive technology because of their simplicity in function, small size, and projected low cost. e aim of this work is to synthesize Ti-substituted lanthanum ferrite perovskite, LaFe 0.8 Ti 0.2 O 3 , in order to develop a resistive sensor device for monitoring carbon monoxide. Since sensor performances are affected by experimental factors, such as temperature, target gas concentration, and gas flow rate, the aim of the authors was to define the optimum working condition by performing multiple regression analyses. e investigated ranges of operating conditions were temperature from 300 to 480°C, carbon monoxide concentration from 100 to 200 ppm, and inlet-gas flow rate from 40 to 100 cm 3 /min. e results confirm that the applied systematic analysis is a powerful method for studying the direct and indirect effects of every experimental factor on sensor performance and for computing mathematical models with predictive ability, that are useful tools for defining the optimum chemiresistors' operating conditions. In addition, mathematical models are able to be used as multiple-factor surface calibration for restive gas sensor devices.

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Low-temperature capacitive sensor based on perovskite oxides

Cited by 12 publications

References 36 publications

Semiconducting Metal Oxides: SrTiO3, BaTiO3 and BaSrTiO3 in Gas-Sensing Applications: A Review

Semiconducting Metal Oxides: SrTiO3, BaTiO3 and BaSrTiO3 in Gas-Sensing Applications: A Review

Perovskite sensing materials for syngas composition monitoring and biomass gasifier numerical model validation: A preliminary approach

Optimization of Working Conditions for Perovskite-Based Gas Sensor Devices by Multiregression Analysis

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