Ammonia Sensing by PANI-DBSA Based Gas Sensor Exploiting Kelvin Probe Technique

Yadav, Anju; Agarwal, Ajay; Agarwal, Pankaj; Saini, Parveen

doi:10.1155/2015/842536

Cited by 13 publications

(12 citation statements)

References 25 publications

(31 reference statements)

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“…The XRD pattern of PANI-DBSA powder (Fig. 2(a) • represent the periodicity in parallel and perpendicular to chain axis respectively [43]. Here, the relative prominence of 2θ ∼ 25 • peak compared to ∼20 • peak confirms the doping of PANI by DBSA to yield most conductive emeraldine salt form of PANI.…”

Section: Results and Discussion A Characterization Of Pani-dbsamentioning

confidence: 70%

“…UV-Visible absorption spectra of PANI-DBSA dispersion in chloroform (Fig. 2(b)) displays three distinguished peaks positioned at ∼345 nm, 430 nm, and 730 nm, corresponding to doping induced bandgap and polaronic states [43]. Again, sufficient doping level present in the polymer is confirmed by the prominence of 730 nm peak compare to 345 nm feature.…”

Section: Results and Discussion A Characterization Of Pani-dbsamentioning

confidence: 82%

“…The general routes for making processable PANI based nanostructured material involve either polymerization of aniline in presence of inorganic acids, followed by undoping with a base and redoping with bulky counter-ion dopants or direct polymerization in the presence of surfactant dopants [42]. However, the use of indirect routes [7], [39] to realize highly doped yet processable PANI nanostructures of desired shape add complexity to the system, whereas the direct route [41], [43] demand strict control over dopant concentration and residual dopant to regulate doping level, particle morphology, dispersibility etc. The mix dopant approach has also been used by researchers but the optimization of properties becomes extremely difficult [33], [38], [40].…”

Section: Introductionmentioning

confidence: 99%

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Improved Ammonia Sensing by Solution Processed Dodecyl Benzene Sulfonic Acid Doped Polyaniline Nanorod Networks

et al. 2019

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Dodecyl benzene sulphonic acid (DBSA) doped polyaniline (PANI) nanorods have been synthesized by a templateless route via in-situ emulsion polymerization of aniline in aqueous DBSA solution. XRD patterns, UV-Visible Spectroscopy, and FTIR analysis confirm the formation of PANI and PANI-DBSA, whereas FESEM images revealed their elongated rod shaped morphology. The chloroform dispersion of synthesized PANI-DBSA was spin coated over prefabricated interdigitated Pt patterned glass substrate to realize porous gas sensing active layer. The sensor displays good response in 1-1200 ppm ammonia concentration range and can repeatedly detect 300 ppm of ammonia with response time of 6 s, recovery time of 37 s and relative response value of 9.57. Besides, its response was found to be linear for 1-50 ppm ammonia concentration with relative response per ppm value of 0.01675. INDEX TERMS Ammonia gas sensor, conducting polymer, dodecyl benzene sulfonic acid doped polyaniline.

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Section: Results and Discussion A Characterization Of Pani-dbsamentioning

confidence: 70%

Section: Results and Discussion A Characterization Of Pani-dbsamentioning

confidence: 82%

Section: Introductionmentioning

confidence: 99%

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Improved Ammonia Sensing by Solution Processed Dodecyl Benzene Sulfonic Acid Doped Polyaniline Nanorod Networks

et al. 2019

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“…Researchers at the National Physical Laboratory (NPL), New Delhi, have recently developed a low‐cost, low‐energy‐consuming NO 2 sensor based on different forms of graphene that can transmit real‐time monitoring in collaboration with partners from the flagship, the Chalmers University of Technology, The Advanced Institute of Technology, Royal Holloway University and Linköping University to measures the level of NO 2. 10–12 This low‐cost and technologically convenient technology employs a basic chemiresistive technique to measure extremely low NO 2 levels, such as below 10 ppb. The World Health Organization recommends a goal level of NO 2 pollution in cities of 21 ppb, although the normal average level in London is 30–40 ppb 13–15 .…”

Section: Introductionmentioning

confidence: 99%

A review on recent developments and advances in environmental gas sensors to monitor toxic gas pollutants

Saxena

Shukla

2023

Env Prog and Sustain Energy

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Air pollutants originating from various sources like vehicular emission, power stations, factories, refineries, industrial emissions, and burning of garbage in open and laboratories, include many toxic gases and pollutants like hydrogen chloride (HCl), hydrogen sulfide (H2S), and volatile organic compounds (VOCs) like benzene, toluene, xylene, and so on, ammonia (NH3), carbon‐monoxide (CO), carbon‐dioxide (CO2) and nitrogen oxides (NOx), and so on, that are constantly released into the atmosphere and continuously deteriorating our natural environment and surroundings. These pollutants create harmful effects on the ecosystem and affect human health. Though there are many devices available for monitoring these pollutants and toxic gases, they are very expensive and time‐consuming. Since the safety of the life of human health, plants, animals, and their surrounding area on topmost priority, thus there is a significant need to develop user‐friendly and environmentally friendly sensing devices for real‐time monitoring of air pollutant emissions, which are extremely hazardous to the environment, breathable air, and human health. Extensive research has been made by researchers to develop an ideal sensor suitable for the environment and which can be within the reach of the masses. This review article presents different types of gas sensors and the technologies on which they work upon. We have also discussed the different gas sensors with their principle of operation. The working, advantages, and disadvantages of each type of sensor have also been discussed and compared with each other. Despite extensive research over several years to develop a highly sensitive, selective, and quick response sensor for the detection of flammable and toxic gases, the future scope and perspective for scientists are also proposed at the end of this article.

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“…Recent research interest on electrically conducting polymers (such as polypyrrole, polythiophene, and polyaniline) in chemical sensing applications is due to the advantages in synthesis techniques and high conductivity, and environmentally friendly nature that aids function at room temperature. Polyaniline has a special attraction in different applications due to high polymerization conversion, low cost, ease of the synthetic approach, and high stability than other polymers. − …”

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confidence: 99%

Polyaniline Anchored MWCNTs on Fabric for High Performance Wearable Ammonia Sensor

2018

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Polyaniline (PANI) functionalized multiwall carbon nanotubes (MWCNTs) were prepared via in situ chemical polymerization process of aniline, in which MWCNTs were spray coated on the fabric for wearable ammonia sensor. Structural, morphological, thermal properties and wettability were analyzed by scanning electron microscope, X-ray diffraction, Raman analysis and contact angle measurement. No substantial change in base resistance of MWCNTs/PANI fabric sensor was observed for a wide range of bending (from 90° to 270°) shows excellent wearability. The sensors were exposed to 20-100 ppm ammonia vapor at room temperature. It was observed that the sensing response of PANI coated MWCNTs was enhanced than MWCNTs and PANI. The sensor has the capability to detect ammonia with high sensitivity (92% for100 ppm), excellent selectivity quick response (9 s), and recovery time (30 s). The lower detection limit (LOD) for the MWCNTs/PANI fabric sensor was found to be 200 ppb. The influence of humidity on sensing parameters was studied. Sensing response and resistance of sensor have shown excellent stability after one month. We observed that PANI have a dual role in enhancing flexibility as well as improve the sensor performance toward ammonia. The results reveal the potential application of fabric based sensor for monitoring NH gas under ambient conditions.

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Ammonia Sensing by PANI-DBSA Based Gas Sensor Exploiting Kelvin Probe Technique

Cited by 13 publications

References 25 publications

Improved Ammonia Sensing by Solution Processed Dodecyl Benzene Sulfonic Acid Doped Polyaniline Nanorod Networks

Improved Ammonia Sensing by Solution Processed Dodecyl Benzene Sulfonic Acid Doped Polyaniline Nanorod Networks

A review on recent developments and advances in environmental gas sensors to monitor toxic gas pollutants

Polyaniline Anchored MWCNTs on Fabric for High Performance Wearable Ammonia Sensor

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