A comparative study on UV light activated porous TiO2 and ZnO film sensors for gas sensing at room temperature

Chen, Hao; Liu, Yuan; Xie, Changsheng; Wu, Jun; Zeng, Dawen; Liao, Yingdi

doi:10.1016/j.ceramint.2011.07.035

Cited by 137 publications

(77 citation statements)

References 25 publications

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“…However, it has defects. Previous studies of our research group on gas sensing of TiO 2 found that, under UV light activation, it was very sensitive to formaldehyde [18].…”

Section: Introductionmentioning

confidence: 99%

UV light activation of TiO2 for sensing formaldehyde: How to be sensitive, recovering fast, and humidity less sensitive

Zhang¹,

Tao²,

Liu³

et al. 2014

Sensors and Actuators B: Chemical

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“…However, it has defects. Previous studies of our research group on gas sensing of TiO 2 found that, under UV light activation, it was very sensitive to formaldehyde [18].…”

Section: Introductionmentioning

confidence: 99%

UV light activation of TiO2 for sensing formaldehyde: How to be sensitive, recovering fast, and humidity less sensitive

Zhang¹,

Tao²,

Liu³

et al. 2014

Sensors and Actuators B: Chemical

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“…The scientific community have been widely investigated on ZnO materials due to its optoelectronic, acoustoelectronic, piezoelectric, and sensoric properties (Barreca et al, 2011;Carney, Yoo, & Akbar, 2005;H. Chen et al, 2012;Della Gaspera et al, 2010;Gong, Li, Hu, Zhou, & Deng, 2010).…”

Section: Zno Gas Sensors For No X Detectingmentioning

confidence: 99%

The Review of Semiconductor Gas Sensor for Nox Detcting

Niyat¹,

Hadi²,

Abadi³

2016

TOJDAC

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During the last century, many semiconductor gas sensors have been presented based on various materials and technologies to detect gas components. Many of them are made to support human's life in different ways. In the last years, the number of sensors which can detect various gas species has increased dramatically especially with respect to global issues of environment and earth atmosphere, the necessity of those gas sensors which can detect air pollutants such as NO x gases in environment is felt. They are essentially required in order to control the systems of combustion exhausted from industry, stationary facilities and automobiles. So it is necessary for the scientists to design and fabricate the gas sensors which are of low cost, selective, sensitive, and accurate especially in low level concentrations of target gases, easy to process and of high recovery and response time, good electrical properties, and above all tunable structure at the nano scale. In this sense, this paper has presented various classifications of gas sensors and various semiconductor oxides for NO x detecting and their technology to convey a comprehensive idea about the semiconductor metals as well as metal oxides for NO x detecting along with their characteristics, structures etc. in order to clarify the future road map towards on the semiconductor materials for NO x detecting. Keywords: sensor, NO x gases, semiconductor, metal oxides INTRODUCTIONIn the last few decades, many studies have been focused on the semiconducting metal oxides which are known as effective gas sensing materials especially for NO x detecting due to their electrical conductivities which are open to change greatly with the changes of atmosphere (K. J. Choi & Jang, 2010;Comini et al., 2009;Fine, Cavanagh, Afonja, & Binions, 2010;Franke, Koplin, & Simon, 2006; Kanan, El-Kadri, Abu-Yousef, & Kanan, 2009; G Korotcenkov & Cho, 2011;J.-H. Lee, 2009;Tricoli, Righettoni, & Teleki, 2010;Wetchakun et al., 2011). The sensing characteristics of such sensors can be optimized by controlling their morphology, surface to volume ratio, and electrical properties. The developments in nanotechnology, fabrication methods, and synthesis provide a suitable atmosphere to construct those sensors with their mentioned sensing characteristics easier.

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“…In recent years the application of ZnO has been widely investigated due to its piezoelectric, optoelectronic, acoustoelectronic and sensoric properties [16,21].…”

Section: Introductionmentioning

confidence: 99%

“…in photocatalysis and in solar cells [16]). Attempts have been made to apply TiO 2 for the detection of gases, including: NH 3 [17], CO [18], H 2 [19], H 2 S [20], vapours of alcohols [21], humidity [22] and others.…”

Section: Introductionmentioning

confidence: 99%

Gas sensors based on nanostructures of semiconductors ZnO and TiO2

Pustelny¹,

Procek²,

Maciak³

et al. 2012

Bulletin of the Polish Academy of Sciences: Technical Sciences

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Abstract. The paper presents a resistance structures with sensor layers based on nanostructures elaborated on the base of TiO2 and ZnO. The structures were tested concerning their sensitivities to the effects of nitrogen dioxide in the atmosphere of synthetic air. The TiO2 and ZnO nanostructures played the role of sensor layers. Investigations have proved that the elaborated resistance structures with TiO2 and ZnO layers are sensitive to the presence of NO2 in the atmosphere of synthetic air. The resistance of the structure amounted to about 20Ω in the case of ZnO structures and to about 200Ω in the case of TiO2 structures. The investigations confirmed that resistance structures with ZnO and TiO2, exposed to the effect of nitrogen dioxide in the atmosphere of synthetic air changes their resistances relatively fast. This indicates that such structures might be practically applied in sensors of nitrogen dioxide ensuring a short time of response.

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A comparative study on UV light activated porous TiO2 and ZnO film sensors for gas sensing at room temperature

Cited by 137 publications

References 25 publications

UV light activation of TiO2 for sensing formaldehyde: How to be sensitive, recovering fast, and humidity less sensitive

UV light activation of TiO2 for sensing formaldehyde: How to be sensitive, recovering fast, and humidity less sensitive

The Review of Semiconductor Gas Sensor for Nox Detcting

Gas sensors based on nanostructures of semiconductors ZnO and TiO2

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