Specific CH&lt;inf&gt;4&lt;/inf&gt; gas sensor based on tungsten carbide/SnO&lt;inf&gt;2&lt;/inf&gt; core-shell modified interdigitated electrode

Nikmanesh, S.; Doroodmand, Mohammad Mahdi; Sheikhi, Mohammad Hossein; Zarifkar, Abbas; Zahabi, Atoosa

doi:10.1109/iraniancee.2013.6599583

Cited by 3 publications

(5 citation statements)

References 16 publications

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“…Biaggi-Labiosa et al 42 recorded a longer response time for sensors tested at low temperatures. The response times at 80 ºC were lower than those Nikmanesh et al 40 observed (65 s for non-doped SnO 2 sensors and 34 s for those doped with tungsten carbide). Nasresfahani et al 47 reported response times of 300-420 s for Pd doped CH 4 sensors, operated at room temperature, much higher than those we recorded at 65 ºC.…”

Section: Sensor Performance Testscontrasting

confidence: 69%

“…Sensor structures based on oxide semiconductors reported in the literature showed response times longer than 10 s and recovery of more than 40 s for CH 4 detection 40 . These authors found that nanostructured doped sensors can affect sensitivity as well as response and recovery times.…”

Section: Sensormentioning

confidence: 98%

“…Electrical resistance varied significantly for all the sensors, which detected CH 4 at all the levels tested. It is important to emphasize that the temperature used is low, compared to those usually applied 39,40 , which favors their application in coal mines, since high temperatures can compromise safety due to the presence of combustible gases.…”

Section: Sensor Performance Testsmentioning

confidence: 99%

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Application of SnO2 Nanoparticles and Zeolites in Coal Mine Methane Sensors

et al. 2019

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We evaluated solid-state sensors (MOS) manufactured using nanostructured tin oxide (SnO 2) obtained by different synthesis methods for selectivity, response and repeatability at different operating temperatures and methane concentrations. In addition, Zeolite 13X pellets were placed in front of the sensors to improve CH 4 selectivity in the presence of CO 2. The palladium doped sensor (1.4% w/w) showed the highest sensitivity at 80 ºC (83%) and shorter response times (16 s), whereas non-doped sensors exhibited the best sensitivity (78%) and response times (14 s) for those with smaller particle size (8 nm). Zeolite 13X pellets proved to be efficient at making the sensor more selective for CH 4 in the presence of CO 2 .

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Section: Sensor Performance Testscontrasting

confidence: 69%

Section: Sensormentioning

confidence: 98%

Section: Sensor Performance Testsmentioning

confidence: 99%

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Application of SnO2 Nanoparticles and Zeolites in Coal Mine Methane Sensors

et al. 2019

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“…At present, the commonly used methane gas sensors are divided into electrical and optical categories. Electrical methane gas sensors are based on catalytic combustion elements, semiconductor gas-sensitive devices, electrochemical sensors, etc [2][3][4]. This kind of electrical gas sensor has high sensitivity and is suitable for multiple types of combustible gases, but the most fatal weakness is the need for electricity, which may generate electric sparks, be poisoned, and often need to be calibrated.…”

Section: Introductionmentioning

confidence: 99%

Fiber Laser Methane Detection Device based on TDLAS and Its Application

Weng

Wang²,

Yang³

2023

J. Phys.: Conf. Ser.

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Methane is a flammable and explosive gas, which is the main component of natural gas, mashgas, and biogas. Using the technology of tunable diode laser absorption spectroscopy (TDLAS) to detect methane, which does not require oxygen, no poisoning, no calibrating, has gas selectivity, strong environmental adaptability, and is stable and reliable. The laser transmission with the optical fiber has the characteristics of low optical loss, long distance and flexible networking. This manuscript demonstrated an optical fiber laser methane detection device based on TDLAS and its application. The laser was transmitted to the methane detection position by optical fiber, and the laser interacted with methane in the optical fiber gas box. The optical fiber collimator coupled the surplus laser into the optical fiber and sent it back to the monitoring device.The photoelectric detector converted the surplus laser to an electrical signal. The monitoring device operation was based on the principle of TDLAS and analyzed the returned laser strength to obtain the concentration of methane. This manuscript described the principle, composition and monitoring spot network of the fiber laser methane monitoring device and shown a practical application.

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“…In fact, the selectivity remains a challenge knowing that more gases can interfere and alter the response that has been designed specifically for the sensor. SnO 2 is well-known as a sensitive material used to detect reducing gases like CO, H 2 , CH 4 [4][5][6][7][8][9][10][11]. It is therefore imperative to develop sensors to detect toxic gases which are able to measure in real-time, to ensure a safety environment.…”

Section: Introductionmentioning

confidence: 99%