Selective detection of carbon dioxide using LaOCl-functionalized SnO2 nanowires for air-quality monitoring

Trung, Do Dang; Toan, Le Duc; Hong, Hoang Si; Лам, Тран Дай; Trung, Tran; Hieu, Nguyen Van

doi:10.1016/j.talanta.2011.10.024

Cited by 76 publications

(40 citation statements)

References 40 publications

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“…Given that CO

_{2}

responses change with the concentration of La

_{2}

_{3}

in the mixture of La

_{2}

_{3}

and SnO

_{2}

[10], the coverage of the La

_{2}

_{3}

layer possibly influences the response to CO

_{2}

and the selectivity, and thus, the deposition condition of La

_{2}

_{3}

layer should be investigated. Nevertheless, the situation that both the SnO

_{2}

and La

_{2}

_{3}

layer were exposed to the atmosphere is similar to previous studies [10,14]. Thus, sensitization by the La

_{2}

_{3}

layer should be obtained in this regard.…”

Section: Resultssupporting

confidence: 87%

“…However, it is difficult to integrate a NDIR sensor into a chip due to the necessity of a bulky optical system. On the other hand, electro-mechanical [5], potentiometric [6,7,8], and conductometric types [9,10,11,12,13,14,15,16,17] have been proposed as miniature CO

_{2}

sensors, feasibly integrated into a chip. In particular, the conductometric-type is most suitable for smart sensors in terms of simplicity of readout circuits and IC-process compatibility.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, although La-based semiconductor sensors show large responses to CO

_{2}

as described above, the responses to CO

_{2}

are still low due to the chemical inertness of CO

_{2}

when compared with those for reactive gases such as CO and H

_{2}

. For example, to our best knowledge, LaOCl-functionalized SnO

_{2}

nanowires (SnO

_{2}

-NW) [14] showed the highest response of 4.5 for 1000-ppm CO

_{2}

amongst the semiconductor materials for CO

_{2}

detection, as shown in Table 1. Furthermore, its sensor area was

800 sans-serifμ normalm \times 1600 sans-serifμ normalm

, and, thus, a structure with a smaller area and a MHP is required for smart sensors with low power consumption.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

CO2 Sensing Characteristics of a La2O3/SnO2 Stacked Structure with Micromachined Hotplates

Iwata

Matsuda

Takahashi

et al. 2017

Sensors

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Demand for the detection of carbon dioxide (CO2) is increasing in various fields, including air-quality monitoring, healthcare, and agriculture. On the other hand, smart gas sensors, in which micromachined gas sensors are integrated with driving circuits, are desirable toward the development of the society of the internet of things. In this study, micromachined hotplate-based CO2 sensors were fabricated and their characteristics were investigated. The sensors have La2O3/SnO2 stacked layers as a sensing material and Pt interdigitated electrodes. A CO2 response of 2.9 for a CO2 concentration of 1000 ppm was obtained at 350 °C with low power consumption (approximately 17 mW). A relatively large response was obtained compared with previous studies even though a compact sputtered-SnO2 film was used. This high response was speculated to be due to a significant contribution of the resistance component near the electrode. Furthermore, CO2 sensing was successfully performed in the CO2 range of 200–4000 ppm with at least 200-ppm resolution.

show abstract

“…Given that CO

_{2}

responses change with the concentration of La

_{2}

_{3}

in the mixture of La

_{2}

_{3}

and SnO

_{2}

[10], the coverage of the La

_{2}

_{3}

layer possibly influences the response to CO

_{2}

and the selectivity, and thus, the deposition condition of La

_{2}

_{3}

layer should be investigated. Nevertheless, the situation that both the SnO

_{2}

and La

_{2}

_{3}

layer were exposed to the atmosphere is similar to previous studies [10,14]. Thus, sensitization by the La

_{2}

_{3}

layer should be obtained in this regard.…”

Section: Resultssupporting

confidence: 87%

_{2}

sensors, feasibly integrated into a chip. In particular, the conductometric-type is most suitable for smart sensors in terms of simplicity of readout circuits and IC-process compatibility.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, although La-based semiconductor sensors show large responses to CO

_{2}

as described above, the responses to CO

_{2}

are still low due to the chemical inertness of CO

_{2}

when compared with those for reactive gases such as CO and H

_{2}

. For example, to our best knowledge, LaOCl-functionalized SnO

_{2}

nanowires (SnO

_{2}

-NW) [14] showed the highest response of 4.5 for 1000-ppm CO

_{2}

amongst the semiconductor materials for CO

_{2}

detection, as shown in Table 1. Furthermore, its sensor area was

800 sans-serifμ normalm \times 1600 sans-serifμ normalm

, and, thus, a structure with a smaller area and a MHP is required for smart sensors with low power consumption.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

CO2 Sensing Characteristics of a La2O3/SnO2 Stacked Structure with Micromachined Hotplates

Iwata

Matsuda

Takahashi

et al. 2017

Sensors

View full text Add to dashboard Cite

show abstract

“…To decorate Pd nanoparticles (Pd-NPs) on the PANi-film-coated interdigitated microelectrode arrays, the Pd-NPs in the pluronic p-123 surface-active copolymercontaining solution (20 L) were dropped equally onto the PANi nanowire layer to functionalize the PANi nanowire surface. The number of droplets was optimized to achieve the best performance of the sensor [24]. The Pd-NPs containing solutions at different concentrations (0.1%, 0.5%, 1.0%, 2.0%, and 3.0%) were used to determine the optimal concentration of the best sensor performance.…”

Section: Methodsmentioning

confidence: 99%

Elaboration of Pd-nanoparticle decorated polyaniline films for room temperature NH3 gas sensors

Hien

Giang

Hiếu

et al. 2017

Sensors and Actuators B: Chemical

Self Cite

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“…Hence the many researches are stimulates towards the detection, capture and storage of CO 2 . Various types of CO 2 sensors such as, solid electrolyte [16], capacitive [17] and resistive [18] have been demonstrated. The resistive CO 2 sensor is based on a change in the electrical conductance of materials due to exposure of CO 2 in air.…”

Section: Introductionmentioning

confidence: 99%

Preparation, characterization and CO 2 gas sensitivity of Polyaniline doped with Sodium Superoxide (NaO 2 )

Barde¹

2016

Materials Research Bulletin

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Selective detection of carbon dioxide using LaOCl-functionalized SnO2 nanowires for air-quality monitoring

Cited by 76 publications

References 40 publications

CO2 Sensing Characteristics of a La2O3/SnO2 Stacked Structure with Micromachined Hotplates

CO2 Sensing Characteristics of a La2O3/SnO2 Stacked Structure with Micromachined Hotplates

Elaboration of Pd-nanoparticle decorated polyaniline films for room temperature NH3 gas sensors

Preparation, characterization and CO 2 gas sensitivity of Polyaniline doped with Sodium Superoxide (NaO 2 )

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