A flexible NO2 gas sensor based on polypyrrole/nitrogen-doped multiwall carbon nanotube operating at room temperature

Liu, Bohao; Liu, Xueyan; Yuan, Zhen; Jiang, Yadong; Su, Yuanjie; Ma, Jianguo; Tai, Huiling

doi:10.1016/j.snb.2019.05.065

Cited by 148 publications

(48 citation statements)

References 43 publications

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“…Resistive sensors have been extensively studied for the detection and quantification of nitrogen dioxide (NO 2 ) gas, based on different materials and under different structures, and have shown satisfactory results as can be seen in Table 2. The combination of different materials has led to improved NO 2 detection properties, for example using: SnO 2 nanocrystals-decorated MWCNTs with IDEs structure [51], molybdenum disulfide (MoS 2 )/graphene hybrid aerogel [52], polypyrrole/nitrogen-doped MWCNTs (PPy/N-MWCNT) on polyimide (PI) as flexible substrate [49], SWCNT/PPy spin-coated onto prepatterned electrodes [53], and ZnO/GONR deposited onto a GaN substrate [46].…”

Section: Resistive Sensorsmentioning

confidence: 99%

Gas sensing based on organic composite materials: Review of sensor types, progresses and challenges

Nasri

Pétrissans

Fierro

2021

Materials Science in Semiconductor Processing

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Over the past decade, organic semiconductors and renewable resources have aroused great interest in basic research and practical applications. Composites based on organic materials and materials of biological origin, if not all bio-based, are potentially abundant and partly biodegradable. These materials have demonstrated advantages making them ideally suited for gas-sensing applications. Herein, we present different detection principles of gas sensing, such as electrochemical, resistive, capacitive, and acoustic sensors. Besides, we describe sensing properties and suitable materials to enhance the selectivity, sensitivity and response/recovery time of gas sensors. In addition, an overview of different forms of materials based on renewable resources and inorganic/organic semiconductors, as well as the development of different types of sensors are discussed. Finally, challenges and future directions are examined in order to develop a low-cost microscale sensing technology using composite materials based on renewable resources. We anticipate that chemical engineering, computer science, machine learning and embedded systems can contribute to the development of new sensing materials.

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Section: Resistive Sensorsmentioning

confidence: 99%

Gas sensing based on organic composite materials: Review of sensor types, progresses and challenges

Nasri

Pétrissans

Fierro

2021

Materials Science in Semiconductor Processing

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“…In the past few years, conducting polymers have been used for the fabrication of highly efficient chemiresistive ammonia sensor working at ambient temperature. Lately, a great deal of research was carried out in the arena of conducting polymers as they possess good electrical properties and find application in various fields of science and technology, especially in gas/vapor sensing devices [ 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 ].…”

Section: Introductionmentioning

confidence: 99%

“…The sensors based on PPy showed quick response at room temperature even at very low concentration of analyte gases/vapors. The main drawback of these sensors is poor selectivity and long-term stability [ 1 , 2 , 3 , 4 , 5 , 6 ]. Both the sensing performance and electrical conductivity of pristine PPy could be enhanced significantly by the formulation of its nanocomposites.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of Reproducible and Selective Ammonia Vapor Sensor-Pellet of Polypyrrole/Cerium Oxide Nanocomposite for Prompt Detection at Room Temperature

et al. 2021

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Polypyrrole (PPy) and polypyrrole/cerium oxide nanocomposite (PPy/CeO2) were prepared by the chemical oxidative method in an aqueous medium using anhydrous ferric chloride (FeCl3) as an oxidant. The successful formulation of materials was confirmed by Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), and transmittance electron microscopy (TEM). A four-in-line probe device was used for studying DC electrical conductivity and ammonia vapor sensing properties of PPy and PPy/CeO2. The significant improvement in both the conductivity and sensing parameters of PPy/CeO2 compared to pristine PPy reveals some synergistic/electronic interaction between PPy and cerium oxide nanoparticles (CeO2 NPs) working at molecular levels. The initial conductivity (i.e., conductivity at room temperature) was found to be 0.152 Scm−1 and 1.295 Scm−1 for PPy and PPy/CeO2, respectively. Also, PPy/CeO2 showed much better conductivity retention than pristine PPy under both the isothermal and cyclic ageing conditions. Ammonia vapor sensing was carried out at different concentration (0.01, 0.03, 0.05, 0.1, 0.2, 0.3, 0.4, and 0.5 vol %). The sensing response of PPy/CeO2 varied with varying concentrations. At 0.5 vol % ammonia concentration, the % sensing response of PPy and PPy/CeO2 sensor was found to be 39.1% and 93.4%, respectively. The sensing efficiency of the PPy/CeO2 sensor was also evaluated at 0.4. 0.3, 0.2, 0.1, 0.05, 0.03, and 0.01 vol % ammonia concentration in terms of % sensing response, response/recovery time, reversibility, selectivity as well as stability at room temperature.

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“…In this work, we studied how the presence of phosphorus may be monitored by the application of electrically conducting sensors from SWCNT films. So far, similar SWCNT ensembles have been employed for sensing alcohols [ 39 ], NH 3 [ 40 ], NO 2 [ 41 ], and volatile organic chemicals (VOCs) [ 42 ], etc. [ 43 ].…”

Section: Introductionmentioning

confidence: 99%

Sensing Organophosphorus Compounds with SWCNT Films

Sahlman

Lundström

Janas

2021

Sensors

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Promising electrical properties of single-walled carbon nanotubes (SWCNTs) open a spectrum of applications for this material. As the SWCNT electronic characteristics respond well to the presence of various analytes, this makes them highly sensitive sensors. In this contribution, selected organophosphorus compounds were detected by studying their impact on the electronic properties of the nanocarbon network. The goal was to untangle the n-doping mechanism behind the beneficial effect of organic phosphine derivatives on the electrical conductivity of SWCNT networks. The highest sensitivity was obtained in the case of the application of 1,6-Bis(diphenylphoshpino)hexane. Consequently, free-standing SWCNT films experienced a four-fold improvement to the electrical conductivity from 272 ± 21 to 1010 ± 44 S/cm and an order of magnitude increase in the power factor. This was ascribed to the beneficial action of electron-rich phenyl moieties linked with a long alkyl chain, making the dopant interact well with SWCNTs.

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A flexible NO2 gas sensor based on polypyrrole/nitrogen-doped multiwall carbon nanotube operating at room temperature

Cited by 148 publications

References 43 publications

Gas sensing based on organic composite materials: Review of sensor types, progresses and challenges

Gas sensing based on organic composite materials: Review of sensor types, progresses and challenges

Fabrication of Reproducible and Selective Ammonia Vapor Sensor-Pellet of Polypyrrole/Cerium Oxide Nanocomposite for Prompt Detection at Room Temperature

Sensing Organophosphorus Compounds with SWCNT Films

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