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Formaldehyde gas sensors: a review.

Chung PR, Tzeng CT, Ke MT, Lee CY - Sensors (Basel) (2013)

Bottom Line: Accordingly, the emergence of sophisticated technologies in recent years has prompted the development of many microscale gaseous formaldehyde detection systems.Besides their compact size, such devices have many other advantages over their macroscale counterparts, including a real-time response, a more straightforward operation, lower power consumption, and the potential for low-cost batch production.This paper commences by providing a high level overview of the formaldehyde gas sensing field and then describes some of the more significant real-time sensors presented in the literature over the past 10 years or so.

View Article: PubMed Central - PubMed

Affiliation: Department of Architecture, National Cheng Kung University, Tainan 701, Taiwan. benjamin@archilife.ncku.edu.tw

ABSTRACT
Many methods based on spectrophotometric, fluorometric, piezoresistive, amperometric or conductive measurements have been proposed for detecting the concentration of formaldehyde in air. However, conventional formaldehyde measurement systems are bulky and expensive and require the services of highly-trained operators. Accordingly, the emergence of sophisticated technologies in recent years has prompted the development of many microscale gaseous formaldehyde detection systems. Besides their compact size, such devices have many other advantages over their macroscale counterparts, including a real-time response, a more straightforward operation, lower power consumption, and the potential for low-cost batch production. This paper commences by providing a high level overview of the formaldehyde gas sensing field and then describes some of the more significant real-time sensors presented in the literature over the past 10 years or so.

No MeSH data available.


(a) SEM image of micro-hotplate within dual-sensor detection chip. (b) Output response of sensor in presence of various compounds with different concentrations [45].
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f15-sensors-13-04468: (a) SEM image of micro-hotplate within dual-sensor detection chip. (b) Output response of sensor in presence of various compounds with different concentrations [45].

Mentions: Lv et al. [45] developed a formaldehyde gas sensor incorporating a thin film of SnO2-NiO nanometer polycrystalline composite deposited on a micro-hotplate (MHP) (see Figure 15(a)). It was shown that the device was capable of detecting gaseous concentrations as low as 0.06 ppm given a MHP working temperature of 300 °C. Moreover, the device showed good selectivity in the presence of common interferents such as alcohol, toluene, α-pinene and acetone (see Figure 15(b)). Gastro-Hurtado et al. [46] presented a NiO thin film formaldehyde gas sensor similar to that proposed by Lee et al.[41] and Wang et al. [44]. The same group also developed a gaseous formaldehyde sensor based on SnO2-nanowires grown by the catalytic oxidation of Sn-sputtered thin films [47]. The experimental results presented in Ref [47] showed that the addition of metal catalyst materials such as Au and Pt improved the sensor response and reduced the device operating temperature to 130 °C.


Formaldehyde gas sensors: a review.

Chung PR, Tzeng CT, Ke MT, Lee CY - Sensors (Basel) (2013)

(a) SEM image of micro-hotplate within dual-sensor detection chip. (b) Output response of sensor in presence of various compounds with different concentrations [45].
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3673094&req=5

f15-sensors-13-04468: (a) SEM image of micro-hotplate within dual-sensor detection chip. (b) Output response of sensor in presence of various compounds with different concentrations [45].
Mentions: Lv et al. [45] developed a formaldehyde gas sensor incorporating a thin film of SnO2-NiO nanometer polycrystalline composite deposited on a micro-hotplate (MHP) (see Figure 15(a)). It was shown that the device was capable of detecting gaseous concentrations as low as 0.06 ppm given a MHP working temperature of 300 °C. Moreover, the device showed good selectivity in the presence of common interferents such as alcohol, toluene, α-pinene and acetone (see Figure 15(b)). Gastro-Hurtado et al. [46] presented a NiO thin film formaldehyde gas sensor similar to that proposed by Lee et al.[41] and Wang et al. [44]. The same group also developed a gaseous formaldehyde sensor based on SnO2-nanowires grown by the catalytic oxidation of Sn-sputtered thin films [47]. The experimental results presented in Ref [47] showed that the addition of metal catalyst materials such as Au and Pt improved the sensor response and reduced the device operating temperature to 130 °C.

Bottom Line: Accordingly, the emergence of sophisticated technologies in recent years has prompted the development of many microscale gaseous formaldehyde detection systems.Besides their compact size, such devices have many other advantages over their macroscale counterparts, including a real-time response, a more straightforward operation, lower power consumption, and the potential for low-cost batch production.This paper commences by providing a high level overview of the formaldehyde gas sensing field and then describes some of the more significant real-time sensors presented in the literature over the past 10 years or so.

View Article: PubMed Central - PubMed

Affiliation: Department of Architecture, National Cheng Kung University, Tainan 701, Taiwan. benjamin@archilife.ncku.edu.tw

ABSTRACT
Many methods based on spectrophotometric, fluorometric, piezoresistive, amperometric or conductive measurements have been proposed for detecting the concentration of formaldehyde in air. However, conventional formaldehyde measurement systems are bulky and expensive and require the services of highly-trained operators. Accordingly, the emergence of sophisticated technologies in recent years has prompted the development of many microscale gaseous formaldehyde detection systems. Besides their compact size, such devices have many other advantages over their macroscale counterparts, including a real-time response, a more straightforward operation, lower power consumption, and the potential for low-cost batch production. This paper commences by providing a high level overview of the formaldehyde gas sensing field and then describes some of the more significant real-time sensors presented in the literature over the past 10 years or so.

No MeSH data available.