A carbon monoxide interdigitated-capacitor gas sensor based upon a n-type Zn2SnO4 thin film

Chen, Yih-Chien; Shen, Yan-Ru; Hsiao, Chih-Lung

doi:10.1007/s10854-017-8078-9

Cited by 5 publications

(3 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, metal oxide semiconductor-based sensors are less expensive and have longer life spans. They have excellent response and are lightweight, and that makes them perfect for environmental monitoring, emission monitoring, and automotive applications. − There are several reports on CO sensors based on undoped materials such as SnO 2 , ZnO, TiO 2 , CeO 2 , β-Ga 2 O 3 , PdO, Zn 2 SnO 4 , LaCoO 3 , doped materials such as Pt-SnO 2 , Al-ZnO, Fe-WO 3 , Cu-TiO 2 , Zn-In 2 O 3 , Pd-SnO 2 , Au-CeO 2 , Cr/Pt-SnO 2 , and Cu@CuO, and composite materials such as PdO-SnO 2 , PdO-NiO, ZnO-CuO, ZrO 2 -MoO 3 , CuO/SnO 2 -In 2 O 3 , and WO 3 @CuWO 4 . In addition to high sensitivity, realizing a CO sensor with high selectivity for various applications such as indoor alarms, multiarrayed sensors, etc.…”

Section: Introductionmentioning

confidence: 99%

Organo-di-benzoic-acidified ZnO Nanohybrids for Highly Selective Detection of CO at Low Temperature

et al. 2020

View full text Add to dashboard Cite

A chemiresistive carbon monoxide (CO) gas sensor comprising of an organo-di-benzoic acidified zinc oxide (ODBA-ZnO) nanohybrid material is reported. The ODBA-ZnO hybrid material is prepared via a single-pot hydrothermal method. The electrical resistance of the drop-casted ODBA-ZnO film on interdigitated electrodes increases noticeably upon exposure to CO (5−500 ppm). The resistance increase is attributed to the formation of complex ions at the organic (ODBA)−inorganic (ZnO) interface in the presence of CO. The detailed CO sensing properties of the ODBA-ZnO nanohybrids reveal a remarkable selectivity to CO gas in comparison to other gases like CO 2 , H 2 S, and NH 3 at 125 °C. The maximum response to 100 ppm of CO is observed to be 35% with the achieved selectivity to CO being 88%, which is the best reported CO selectivity result available in the literature to date. The ODBA-ZnO nanohybrid sensor takes nearly 91 s to reach the saturated response to 100 ppm of CO and nearly 175 s to recover from it in a synthetic air environment. A systematic study using field emission scanning electron microscopy, X-ray diffraction, energy-dispersive X-ray spectroscopy, nitrogen adsorption−desorption tests, and thermogravimetric analysis reveals that introduction of an organic moiety (ODBA) to ZnO played a key role in achieving improved selectivity and sensitivity toward CO. The present work provides a simple route for fabricating the ODBA-ZnO sensor to achieve better selectivity and sensitivity to CO gas at a relatively low temperature (125 °C).

show abstract

Section: Introductionmentioning

confidence: 99%

Organo-di-benzoic-acidified ZnO Nanohybrids for Highly Selective Detection of CO at Low Temperature

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Besides, based on the characteristics of good extensibility and light weight, flexible sensors can better meet the requirements of small robots because of the problems of small size and complex structure of the small robot. However, most of the current sensors that detect CO are non‐flexible [7–17], which is not good for applications on small robots. For example, Anggraini et al [14] have proposed a selective CO sensor by the use of both of CuCrFeO 4 and CoCrFeO 4 as the sensing electrode, which is capable of detecting CO in the concentration range of 20–700 ppm, but the structure of the sensor is complex and difficult to make.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Anggraini et al [14] have proposed a selective CO sensor by the use of both of CuCrFeO 4 and CoCrFeO 4 as the sensing electrode, which is capable of detecting CO in the concentration range of 20–700 ppm, but the structure of the sensor is complex and difficult to make. Chen et al [15] have designed a CO interdigitated‐capacitor gas sensor based upon an n‐type Zn 2 SnO 4 thin film. The sensor has good linearity with the CO concentration range from 0 to 200 ppm, but it must be heated to function properly.…”

Section: Introductionmentioning

confidence: 99%