Room Temperature Ammonia Gas Sensor Based on Polyaniline-TiO$_{2}$ Nanocomposite

Pawar, S. G.; Chougule, M. A.; Patil, S. L.; Raut, B. T.; Godse, P. R.; Sen, Shashwati; Patil, V. B.

doi:10.1109/jsen.2011.2160392

Cited by 95 publications

(26 citation statements)

References 17 publications

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“…It is found that, the studied p-type NiO thin film based ammonia gas sensor exhibits comparable NH 3 sensing performance as compared to n-type MO devices [4], [7]- [11]. The different trend in resistance (conductance) change, upon exposing to ammonia gases, also demonstrates the potentiality to fabricate the interesting complementary metal oxide sensor (CMOS) array based on the integration of the studied device and other n-type MO sensors.…”

Section: Resultsmentioning

confidence: 76%

“…Over past years, many n-type semiconducting metaloxides (MOs), e.g., TiO 2 [4], SnO 2 [7], ZnO [8], TiO 2 /ZnO [9], WO 3 [10] and ITO [11], have been reported to produce smart NH 3 gas sensors. C. S. Hsu et al presented a high ammonia sensing response ratio of 1786% (@ 1000 ppm NH 3 /air at 150°C) and a lower detection limit of 175 ppb NH 3 /air based on an ITO thin film with an underlying Au-nanodot layer [11].…”

Section: Introductionmentioning

confidence: 99%

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On the Ammonia Gas Sensing Performance of a RF Sputtered NiO Thin-Film Sensor

et al. 2015

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An interesting ammonia gas sensor based on a p-type NiO thin film, prepared by a radio frequency sputtering process, is studied and demonstrated. As compared with conventional n-type metal-oxide sensors, the studied device shows comparable and good sensing performance, including a high-sensing response ratio of 289%, a lower response time of 31 s, and a lower recovery time of 78 s, under an introduced 1000 ppm NH 3 /air gas at 250°C and 350°C, respectively. In addition, the studied sensor device exhibits a lower detection limit (<5 ppm NH 3 /air) at 250°C. Consequently, based on these advantages and inherent benefits of low cost, chemical stability, and easy fabrication, etc., the studied NiO thin-film sensor shows the promise for high-performance ammonia gas sensing applications.

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Section: Resultsmentioning

confidence: 76%

Section: Introductionmentioning

confidence: 99%

On the Ammonia Gas Sensing Performance of a RF Sputtered NiO Thin-Film Sensor

et al. 2015

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“…Then, they mixed PANI and TiO 2 by mechanical mixing method to prepare PANI-TiO 2 nanocomposites. The response of the sensor to 100 ppm NH 3 is 50% (Pawar et al, 2011a). Liu et al prepared the PANI-TiO 2 -Au ternary nanocomposite thin film by in-situ self-assembly method.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Sub-ppm NH3 Gas Sensing Performance of PANI/TiO2 Nanocomposites at Room Temperature

et al. 2018

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PANI/TiO2 nanocomposites spheres were synthesized using a simple and efficient one-step hydrothermal process. The morphology and structure of PANI/TiO2 nanocomposites spheres were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM) techniques. The PANI/TiO2 nanocomposite sphere-based sensor exhibits good selectivity, sensitivity (5.4 to 100 ppm), repeatability, long-term stability and low detection limit (0.5 ppm) to ammonia at room temperature (20 ± 5°C). It also shows a good linearity relationship in the range of 0.5–5 and 5–100 ppm. The excellent NH3 sensing performance is mainly due to the formation of the p-n heterostructure in the nanocomposites.

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“…However, the sensitivity of PANI remains to be improved [21–22]. To conquer the limitations mentioned above, the combination of metal oxide and conducting polymers have been developed as an effective way to achieve enhanced performance [21,23–27]. …”

Section: Introductionmentioning

confidence: 99%

Ammonia gas sensors based on In₂O₃/PANI hetero-nanofibers operating at room temperature

Nie¹,

Pang²,

Lu³

et al. 2016

Beilstein J. Nanotechnol.

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SummaryIndium nitrate/polyvinyl pyrrolidone (In(NO3)3/PVP) composite nanofibers were synthesized via electrospinning, and then hollow structure indium oxide (In2O3) nanofibers were obtained through calcination with PVP as template material. In situ polymerization was used to prepare indium oxide/polyaniline (In2O3/PANI) composite nanofibers with different mass ratios of In2O3 to aniline. The structure and morphology of In(NO3)3/PVP, In2O3/PANI composite nanofibers and pure PANI were investigated by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), transmission electron microscopy (TEM) and current–voltage (I–V) measurements. The gas sensing properties of these materials towards NH3 vapor (100 to 1000 ppm) were measured at room temperature. The results revealed that the gas sensing abilities of In2O3/PANI composite nanofibers were better than pure PANI. In addition, the mass ratio of In2O3 to aniline and the p–n heterostructure between In2O3 and PANI influences the sensing performance of the In2O3/PANI composite nanofibers. In this paper, In2O3/PANI composite nanofibers with a mass ratio of 1:2 exhibited the highest response values, excellent selectivity, good repeatability and reversibility.

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Room Temperature Ammonia Gas Sensor Based on Polyaniline-TiO$_{2}$ Nanocomposite

Cited by 95 publications

References 17 publications

On the Ammonia Gas Sensing Performance of a RF Sputtered NiO Thin-Film Sensor

On the Ammonia Gas Sensing Performance of a RF Sputtered NiO Thin-Film Sensor

Enhanced Sub-ppm NH3 Gas Sensing Performance of PANI/TiO2 Nanocomposites at Room Temperature

Ammonia gas sensors based on In₂O₃/PANI hetero-nanofibers operating at room temperature

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Room Temperature Ammonia Gas Sensor Based on Polyaniline-TiO$_{2}$ Nanocomposite

Cited by 95 publications

References 17 publications

On the Ammonia Gas Sensing Performance of a RF Sputtered NiO Thin-Film Sensor

On the Ammonia Gas Sensing Performance of a RF Sputtered NiO Thin-Film Sensor

Enhanced Sub-ppm NH3 Gas Sensing Performance of PANI/TiO2 Nanocomposites at Room Temperature

Ammonia gas sensors based on In2O3/PANI hetero-nanofibers operating at room temperature

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Ammonia gas sensors based on In₂O₃/PANI hetero-nanofibers operating at room temperature