Vanadium doped tin dioxide as a novel sulfur dioxide sensor

Das, Santanu; Chakraborty, Saswata; Parkash, Om; Kumar, Devendra; Bandyopadhyay, S.; Samudrala, S K; Sen, Amarnath; Maiti, Himadri Sekhar

doi:10.1016/j.talanta.2007.11.010

Cited by 100 publications

(50 citation statements)

References 26 publications

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“…With a maximum allowed limit in the atmosphere of 10 ppm H2S [6], developing reliable sensors with high sensitivity and also selectivity towards other gases is a real challenge. Sulfur dioxide (SO2) gas is one of the most toxic and common air pollutants [4,8,9]. Due to growing concern on environmental issues, much attention has been focused on the monitoring of air pollutants.…”

Section: Introductionmentioning

confidence: 99%

“…Also, an exposure to SO2 can cause irritation to eyes, skin and respiratory system. These are the reason for increasing requirements to monitor the gas pollutions in urban agglomerates or in the work ambient atmosphere [8,9]. The long-term exposure limit and the short-term exposure limit of sulfur dioxide gas are 2-5 ppm, respectively, although the acceptable limit of SO2 in ambient air is much less.…”

Section: Introductionmentioning

confidence: 99%

“…The long-term exposure limit and the short-term exposure limit of sulfur dioxide gas are 2-5 ppm, respectively, although the acceptable limit of SO2 in ambient air is much less. Nevertheless, the monitoring of SO2 leakage at the source may be helpful to contain not only the accidental exposure at the source but also environmental pollution in general [8,9]. Therefore, rapid detections of poisonous and hazardous gases including H2S and SO2 in technological wastes are challenging.…”

Section: Introductionmentioning

confidence: 99%

“…SnO2 is one of the most promising materials for sensor and has attractively established the attention of many users and scientists' interest in gas sensing under atmospheric conditions. It is a wide band gap and the best-understood prototype of oxide-based gas sensors for the detection of various noxious gases especially H2S and SO2 [1][2][3][4][5][6][7][8][9]. In the present study, Flame Spray Pyrolysis (FSP) is presented as a very promising technique for sensor material fabrication since it enables primary particle and crystal size control [18,19], which is important to improve the sensitivity, as well as controlling in situ deposition of noble metal clusters [19].…”

Section: Introductionmentioning

confidence: 99%

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The Monitoring of H2S and SO2 Noxious Gases from Industrial Environment with Sensors Based on Flame-Spray-Made SNO2 Nanoparticles

Liewhiran¹,

Tamaekong²,

Wisitsoraat³

et al. 2012

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Abstract. The noxious gas sensors were developed successfully using flame-spray-made SnO2 nanoparticles as the sensing materials. The functionalized nanoparticle properties were further analyzed by XRD, BET and TEM analyses. The SnO2 nanoparticles (SSABET: 141.6 m 2 /g) were investigated revealing non-agglomerated spherical, hexagonal, rectangle (3-10 nm), and rod-like (3-5 nm in width and 5-20 nm in length) morphologies. The sensing films were prepared by spin coating onto the Al2O3 substrates interdigitated with Au electrodes. The sensing films were significantly developed in order to detect with H2S (0.5-10 ppm) and SO2 (20-500 ppm) at the operating temperature ranging from 200-350°C. After sensing test, the cross-section of sensing film was analyzed by SEM analyses. It was found that SnO2 sensing film showed higher sensitivity to H2S gas with very fast response at lower concentrations (3s, to 10 ppm). The cross sensitivities of the sensor towards different concentrations of H2S, CO, H2, and C2H2 were measured at 300°C. The sensor evidently shows much less response to CO, H2, and C2H2 than to H2S indicating higher selectivity for H2S of the SnO2 sensor at the lower concentration (10 ppm). Therefore, the SnO2 sensor was the most suitable candidate for the efficient detection of H2S noxious gas.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Monitoring of H2S and SO2 Noxious Gases from Industrial Environment with Sensors Based on Flame-Spray-Made SNO2 Nanoparticles

Liewhiran¹,

Tamaekong²,

Wisitsoraat³

et al. 2012

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“…Das et al [28] reported the results of their research about this phenomenon. At working temperature 350 ∘ C, SnO 2 has a different percentage response towards different concentrations of SO 2 .…”

Section: So 2 Gasmentioning

confidence: 98%

SnO₂Nanostructure as Pollutant Gas Sensors: Synthesis, Sensing Performances, and Mechanism

Yuliarto

Gumilar

Septiani

2015

Advances in Materials Science and Engineering

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A significant amount of pollutants is produced from factories and motor vehicles in the form of gas. Their negative impact on the environment is well known; therefore detection with effective gas sensors is important as part of pollution prevention efforts. Gas sensors use a metal oxide semiconductor, specifically SnO 2 nanostructures. This semiconductor is interesting and worthy of further investigation because of its many uses, for example, as lithium battery electrode, energy storage, catalyst, and transistor, and has potential as a gas sensor. In addition, there has to be a discussion of the use of SnO 2 as a pollutant gas sensor especially for waste products such as CO, CO 2 , SO 2 , and NO x . In this paper, the development of the fabrication of SnO 2 nanostructures synthesis will be described as it relates to the performances as pollutant gas sensors. In addition, the functionalization of SnO 2 as a gas sensor is extensively discussed with respect to the theory of gas adsorption, the surface features of SnO 2 , the band gap theory, and electron transfer.

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Gas Dielectric Transistor of CuPc Single Crystalline Nanowire for SO₂ Detection Down to Sub‐ppm Levels at Room Temperature

et al. 2013

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Sulfur dioxide (SO 2 ) is one of the most dangerous air pollutants that impair environment and human health. SO 2 in air is released during the burning of fossil fuels and plays one major role in the formation of acid rain. The repeated exposure to low levels of SO 2 can cause permanent pulmonary impairment for humans. [ 1 ] The long and short-term exposure limits for SO 2 gas are 2 and 5 ppm, respectively, [ 1 , 2 ] and the U. S. Environmental Control Agency has set the acceptable limit for SO 2 in ambient air at a level of 0.5 ppm. [ 3 ] It is of great importance to measure low concentration of SO 2 in air accurately and fast for human health protection and air-quality monitoring.Semiconductor resistor sensors are, for more than 30 years, one of the most common used gas sensors to detect toxic and fl ammable gases such as NO 2 , H 2 S, CO, NH 3 , and H 2 because of their distinguished merits such as low cost, long lasting, high sensitivity, and good reliability, etc. [ 4 ] Organic fi eld-effect transistor (OFET) is another alternative semiconductor sensing technology with advantages over resistors, and has attracted much attention only recently. [ 5 ] The sensitivity can be dramatically enhanced by changing the source-drain current ( I SD ) of OFET when operating the sensors in the sub-threshold regime, as a result of the current modulation by the extra gate electrode. [ 6 ] Another advantage of OFET sensors is that the sensing response can be enhanced by integrating them in oscillator and adaptive amplifi er circuits. [ 7 ] These advantages combined with low cost and light weight of organic semiconductors ensure that OFET sensors have attracted much attention for the detection of a wide range of gases. [ 8 ] However, only few efforts have been made to develop the semiconductor SO 2 sensors and almost all of them are resistortype (a detailed performance list for the reported semiconductor SO 2 sensors is shown in Supporting Information Table S1). The semiconductor materials are mainly focused on metal oxide, such as SnO 2 , WO 3 and TiO 2 . Most reported semiconductor SO 2 sensors require an operating temperature of 200-600 ° C, demonstrate a sensitivity lower than 50%, face challenges in low concentration detection, or suffer from a slow response and recovery time of over 10 min.In this communication, an OFET based on gas dielectric and CuPc single crystalline nanowire as a novel SO 2 sensor with complete recovery and room-temperature detection is reported.To the best of our knowledge, this is the fi rst demonstration of SO 2 gas sensing based on OFETs. The sensitivity is characterized by the enhanced fi eld-effect mobility and is as high as 764% in 20 ppm SO 2 . The detect limitation is down to sub-ppm levels (0.5 ppm) with high sensitivity (119%) and high resolution (100 ppb). The exposed conductive channel is shown to be responsible for the sensitivity to SO 2 . Figure 1 a shows a schematic image of the gas dielectric fi eldeffect transistor (FET) sensor based on CuPc nanowire and the adsorption of SO 2 ...

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Vanadium doped tin dioxide as a novel sulfur dioxide sensor

Cited by 100 publications

References 26 publications

The Monitoring of H2S and SO2 Noxious Gases from Industrial Environment with Sensors Based on Flame-Spray-Made SNO2 Nanoparticles

The Monitoring of H2S and SO2 Noxious Gases from Industrial Environment with Sensors Based on Flame-Spray-Made SNO2 Nanoparticles

SnO₂Nanostructure as Pollutant Gas Sensors: Synthesis, Sensing Performances, and Mechanism

Gas Dielectric Transistor of CuPc Single Crystalline Nanowire for SO₂ Detection Down to Sub‐ppm Levels at Room Temperature

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Vanadium doped tin dioxide as a novel sulfur dioxide sensor

Cited by 100 publications

References 26 publications

The Monitoring of H2S and SO2 Noxious Gases from Industrial Environment with Sensors Based on Flame-Spray-Made SNO2 Nanoparticles

The Monitoring of H2S and SO2 Noxious Gases from Industrial Environment with Sensors Based on Flame-Spray-Made SNO2 Nanoparticles

SnO2Nanostructure as Pollutant Gas Sensors: Synthesis, Sensing Performances, and Mechanism

Gas Dielectric Transistor of CuPc Single Crystalline Nanowire for SO2 Detection Down to Sub‐ppm Levels at Room Temperature

Contact Info

Product

Resources

About

SnO₂Nanostructure as Pollutant Gas Sensors: Synthesis, Sensing Performances, and Mechanism

Gas Dielectric Transistor of CuPc Single Crystalline Nanowire for SO₂ Detection Down to Sub‐ppm Levels at Room Temperature