Semiconducting metal oxides as sensors for environmentally hazardous gases

Wetchakun, Khatcharin; Samerjai, Thanittha; Tamaekong, Nittaya; Liewhiran, C.; Siriwong, Chawarat; Kruefu, Viruntachar; Wisitsoraat, Anurat; Tuantranont, Adisorn; Phanichphant, Sukon

doi:10.1016/j.snb.2011.08.032

Cited by 1,119 publications

(579 citation statements)

References 85 publications

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“…When sensor is exposed to strong oxidizing NO 2 gas, it reacts with ionosorbed oxygen ions leading to the formation of adsorbed NO − 2 (ads) [31] as follows:…”

Section: (Ads) ) When Thementioning

confidence: 99%

Chemically synthesized PbS Nano particulate thin films for a rapid NO₂ gas sensor

Burungale

Devan

Pawar

et al. 2016

Materials Science-Poland

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Rapid NO 2 gas sensor has been developed based on PbS nanoparticulate thin films synthesized by Successive Ionic Layer Adsorption and Reaction (SILAR) method at different precursor concentrations. The structural and morphological properties were investigated by means of X-ray diffraction and field emission scanning electron microscope. NO 2 gas sensing properties of PbS thin films deposited at different concentrations were tested. PbS film with 0.25 M precursor concentration showed the highest sensitivity. In order to optimize the operating temperature, the sensitivity of the sensor to 50 ppm NO 2 gas was measured at different operating temperatures, from 50 to 200 • C. The gas sensitivity increased with an increase in operating temperature and achieved the maximum value at 150 • C, followed by a decrease in sensitivity with further increase of the operating temperature. The sensitivity was about 35 % for 50 ppm NO 2 at 150 • C with rapid response time of 6 s. T90 and T10 recovery time was 97 s at this gas concentration.

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“…When sensor is exposed to strong oxidizing NO 2 gas, it reacts with ionosorbed oxygen ions leading to the formation of adsorbed NO − 2 (ads) [31] as follows:…”

Section: (Ads) ) When Thementioning

confidence: 99%

Chemically synthesized PbS Nano particulate thin films for a rapid NO₂ gas sensor

Burungale

Devan

Pawar

et al. 2016

Materials Science-Poland

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“…A number of gas-sensing materials, such as semiconductor, intrinsically conducting polymer, conducting polymer composite etc. have been adopted in these sensors based on various transduction units, for example, chemiresistive, surface acoustic wave, quartz crystal microbalance, optical transducers and metal-oxide-semiconductor field-effect transistor (MOSFET) 5 . Among them, chemiresistive gas sensors based on semiconductor have been subjected to extensive research and development due to their advantageous features such as low cost, high sensitivity, fast response/ recovery time, and simplicity in device structure and circuitry 6 .…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Star-Shaped Lead Sulfide (PbS) Nanomaterials and theirs Gas-Sensing Properties

et al. 2016

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Star-shaped PbS nanomaterials are synthesized by a hydrothermal method. Morphology and structure of the PbS nanomaterials are analyzed by SEM, HRTEM and XRD. Gas-sensing properties of the as-prepared PbS sensor are also systematically investigated. The results show star-shaped PbS nanostructure consists of four symmetric arms in the same plane and demonstrate good crystallinity. With the increase of ethanol concentration, the sensitivity of the PbS sensor significantly increases and demonstrates an almost linear relationship at the optimal operating temperature of 400 o C. Moreover, the fast response-recovery towards ethanol is also observed, which indicates its great potential on ethanol detection.

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“…Pollution monitoring, for example CO, NO • 2 , SO 2 , and O 3 (Nihal, et al, 2008, Wetchakun, et al, 2011 Breath analyzers, for breath-alcohol content (BAC) measurements (Knott, 2010) • Domestic gas monitoring, such as propane (Gómez-Pozos, et al, 2013) • Temperature, as in integrated electronic equipment (Fraden, 2010) • Magnetism, for example, magnetometers for six degrees of freedom applications • (Coey, 2010, Sze, et al, 2007 Optical sensing, such as in charge-coupled device detectors in cameras ( • EUROPE.COM, 2013)…”

Section: Gas Monitoring •mentioning

confidence: 99%

Sensing and Sensor Fundamentals

McGrath¹,

Scanaill²

2013

Sensor Technologies

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Sensors utilize a wide spectrum of transducer and signal transformation approaches with corresponding variations in technical complexity. These range from relatively simple temperature measurement based on a bimetallic thermocouple, to the detection of specific bacteria species using sophisticated optical systems. Within the healthcare, wellness, and environmental domains, there are a variety of sensing approaches, including microelectromechanical systems (MEMS), optical, mechanical, electrochemical, semiconductor, and biosensing. As outlined in Chapter 1, the proliferation of sensor-based applications is growing across a range of sensing targets such as air, water, bacteria, movement, and physiology. As with any form of technology, sensors have both strengths and weaknesses. Operational performance may be a function of the transduction method, the deployment environment, or the system components. In this chapter, we review the common sensing mechanisms that are used in the application domains of interest within the scope of this book, along with their respective strengths and weaknesses. Finally, we describe the process of selecting and specifying sensors for an application.

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Semiconducting metal oxides as sensors for environmentally hazardous gases

Cited by 1,119 publications

References 85 publications

Chemically synthesized PbS Nano particulate thin films for a rapid NO₂ gas sensor

Chemically synthesized PbS Nano particulate thin films for a rapid NO₂ gas sensor

Synthesis of Star-Shaped Lead Sulfide (PbS) Nanomaterials and theirs Gas-Sensing Properties

Sensing and Sensor Fundamentals

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Semiconducting metal oxides as sensors for environmentally hazardous gases

Cited by 1,119 publications

References 85 publications

Chemically synthesized PbS Nano particulate thin films for a rapid NO2 gas sensor

Chemically synthesized PbS Nano particulate thin films for a rapid NO2 gas sensor

Synthesis of Star-Shaped Lead Sulfide (PbS) Nanomaterials and theirs Gas-Sensing Properties

Sensing and Sensor Fundamentals

Contact Info

Product

Resources

About

Chemically synthesized PbS Nano particulate thin films for a rapid NO₂ gas sensor

Chemically synthesized PbS Nano particulate thin films for a rapid NO₂ gas sensor