CO gas sensing properties of In4Sn3O12 and TeO2 composite nanoparticle sensors

Mirzaei, Ali; Park, Sunghoon; Sun, Guang–Zhen; Kheel, Hyejoon; Lee, Chongmu

doi:10.1016/j.jhazmat.2015.11.044

Cited by 81 publications

(20 citation statements)

References 38 publications

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“…Upon exposure of the sensor to CO gas, the gas reacts with adsorbed electrons on the surface of the sensor according to the following reaction [24]: …”

Section: Resultsmentioning

confidence: 99%

Synthesis and gas sensing properties of membrane template-grown hollow ZnO nanowires

Kim

Mirzaei

et al. 2017

Nano Convergence

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One-dimensional, hollow nanostructured materials are among the most promising materials for sensing applications owing to their high surface area that facilitates the adsorption of target gases. Accordingly, for gas sensing studies, hollow ZnO nanowires (NWs) with different surface areas were successfully synthesized herein by using polycarbonate membranes with different pore sizes as templates, and deposition of ZnO via the atomic layer deposition technique. The sensing properties of the synthesized hollow ZnO NWs were examined for CO and NO2, revealing their comparative sensing performances with ZnO nanomaterials-based sensors reported in literature. This study highlights a novel way of synthesizing hollow ZnO NWs by using membrane template and their promising sensing properties as well.

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“…Upon exposure of the sensor to CO gas, the gas reacts with adsorbed electrons on the surface of the sensor according to the following reaction [24]: …”

Section: Resultsmentioning

confidence: 99%

Synthesis and gas sensing properties of membrane template-grown hollow ZnO nanowires

Kim

Mirzaei

et al. 2017

Nano Convergence

Self Cite

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“…The gas measurements are based on the change in the conductivity of the sensor due to the surface chemical reaction between the sensor's surface and the reducing or oxidizing measured gases. It is commonly acknowledged that the sensing of the n-type semiconductors is controlled by the resistance changing that is brought about by the adsorption and desorption of gas molecules on the surface of the sensor [9][10][11][12][13][14] as described below. When the sensor is exposed in air, the O 2 molecules from the air capture electrons from the semiconductor's conduction band (CB).…”

Section: Sensors For Air Pollutionmentioning

confidence: 99%

“…When the sensor is exposed to reducing gas (for example, CO, methanol or ethanol vapour, etc.) a redox reaction occurs between the adsorbed oxygen species and the molecules of the measured gas-equations (8)(9)(10).…”

Section: Sensors For Air Pollutionmentioning

confidence: 99%

“…Two materials (In 4 Sn 3 O 12 NPs and In 4 Sn 3 O 12 -TeO 2 composite NPs) have been synthesized by hydrothermal route and their gas-sensing properties toward CO were examined at different concentrations (5-100 ppm) of CO in the temperature range of 100-300 •C [9]. The In 4 Sn 3 O 12 -TeO 2 composite NPs sensor showed better sensing performance with response of 10.21, the response and recovery time of 19.73 s and of 217.5 s correspondingly for 100 ppm CO at 200 •C.…”

Section: Indium Nps Based Sensorsmentioning

confidence: 99%

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Gallium and indium nanomaterials for environmental protection

2020

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Recent advances in preparation and use of gallium and indium nanoparticles and nanocomposites are briefly presented. The following applications of the obtained materials are outlined: (i) Preparation of sensors for measuring in air of gaseous pollutants (carbon monoxide, nitrogen dioxide, hydrogen sulfide, ammonia, ozone, hydrogen), vapours of volatile organic compounds (methanol, ethanol, butanol, acetone, liquefied petroleum gas), and humidity, including the basics of the sensing mechanism; (ii) removal of water pollutants by photocatalysis and/or adsorption. Finally, conclusions are drawn about the potential of gallium and indium nanoparticles and nanocomposites and the further studies needed to achieve the implementation of these materials in the real life.

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“…Thus, the development of highly selective and stable CO sensors is an important goal and will assist in the study of environmental impacts. Motivated by the increasingly strict laws for different pollutant sources, recently there has been rapid progress in the fabrication of sensors to detect and monitor the environment, and several types of gas sensors have been reported in the literature [4][5][6][7][8][9].…”

mentioning

confidence: 99%

Pore structure control of activated carbon fiber for CO gas sensor electrode

Bai¹,

배태성²

2016

Carbon letters

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Materials with porous structures developed in previous research have been used extensively in industrial purification and chemical recovery operations due to their large specific surface areas and pore volumes. Among a wide range of activation methods, chemical activation is an effective and simple method to prepare activated carbons with a high specific surface area. Depending on the chemical agents used, chemical activation can lead to unique pore structures [1][2][3].CO gas detection has recently become a critical issue because CO is one of the most common air pollutants. Pollutant CO gas is produced by incomplete hydrocarbon burning and accompanies almost all combustion processes. CO is especially dangerous because it possesses no odor or color and is therefore undetectable by humans. CO gas also becomes explosive at concentrations above 12% and has a threshold limit value of 25 ppm. Vehicle exhaust is a major source of environmental CO emissions and contributes to smog formation. Thus, the development of highly selective and stable CO sensors is an important goal and will assist in the study of environmental impacts. Motivated by the increasingly strict laws for different pollutant sources, recently there has been rapid progress in the fabrication of sensors to detect and monitor the environment, and several types of gas sensors have been reported in the literature [4][5][6][7][8][9].In this study, carbon based materials were used to fabricate a gas sensor matrix by electrospinning and heat treatment. To improve the sensitivity of the sensor by enhancing the gas adsorption, a porous structure was developed using chemical activation. The gas sensing mechanism was discussed based on the carbon pore structure.A polymer solution was prepared by dissolving polyacrylonitrile (PAN; d = 1.184, 181315 Aldrich, USA) in N,N-dimethyl formamide (DMF; d = 133, 766137 Fisher, USA). Electrospun fibers were obtained from the polymer solution using the electrospinning method. The electrospinning process was carried out under the following conditions: 0.8 mL/h polymer solution feed rate, 13 kV supplied voltage, 12 cm tip to collector distance, and 120 rpm collector rotation. The electrospun materials were stabilized by heating up to 523 K in air at a heating rate of 3 K min -1 , followed by treatment of the samples at 523 K for 3 h. Carbonization of the stabilized electrospun materials was carried out under an argon atmosphere with the following conditions: 15 K/min heating rate, 1273 K reaction temperature, 1 h holding time, and a 50 mL/h argon feed rate. The prepared sample was named CF.H 3 PO 4 solutions (1, 2, 3, and 4 M) were prepared as chemical activation agents. The CF was placed in an alumina boat in a steel pipe at a ratio of 20 mL/g (H 3 PO 4 solution/CF) to carry out the chemical activation. Activation was conducted at 1023 K for 2 h in an argon atmosphere. The heating rate was 5 K/min and the feed rate of the argon gas was 30 mL/min. Following the chemical activation, the obtained samples were washed several time...

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CO gas sensing properties of In4Sn3O12 and TeO2 composite nanoparticle sensors

Cited by 81 publications

References 38 publications

Synthesis and gas sensing properties of membrane template-grown hollow ZnO nanowires

Synthesis and gas sensing properties of membrane template-grown hollow ZnO nanowires

Gallium and indium nanomaterials for environmental protection

Pore structure control of activated carbon fiber for CO gas sensor electrode

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