Thin film polypyrrole/SWCNTs nanocomposites-based NH3 sensor operated at room temperature

Hieu, Nguyen Van; Dũng, Nguyễn Quốc; Tam, Phuong Dinh; Trung, Tran; Chien, Nguyen Duc

doi:10.1016/j.snb.2009.04.061

Cited by 104 publications

(28 citation statements)

References 56 publications

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“…DMBz is the best MSDI developed in the laboratory. [16,26] Its sensitivity was of the same order of magnitude as the polymer-based devices [27][28][29][30][31] but lower than devices made from graphene [32] for which desorption is obtained by heating at ca. 200°C, or from hybrid materials, e.g.…”

Section: Comparative Overviewmentioning

confidence: 91%

Modulation of the organic heterojunction behavior, from electrografting to enhanced sensing properties

Mateos

Meunier‐Prest

Suisse

et al. 2019

Sensors and Actuators B: Chemical

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Section: Comparative Overviewmentioning

confidence: 91%

Modulation of the organic heterojunction behavior, from electrografting to enhanced sensing properties

Mateos

Meunier‐Prest

Suisse

et al. 2019

Sensors and Actuators B: Chemical

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“…The characteristic peaks of PPy at 1454 cm −1 and 1545 cm −1 are also observed for the PPy-MWCNT composites, indicating the formation of PPy in presence of MWCNT. It is important to observed that peak of PPy at 1545 cm −1 becomes slightly broaden in almost all nanocomposite samples and the characteristic peaks of MWNTs are hardly seen which indicates the better interaction between the aromatic ring of pyrrole and MWCNT [34] [35]. It is observed that all the peaks appeared in the fingerprint region of PPy are observed in the FT-IR spectra of PPy-MWCNT nanocomposites indicating that main constituents of PPy and its nanocomposite with MWCNTs have the same chemical structure.…”

Section: Characterization Of Ppy-mwcnt Nanocompositementioning

confidence: 96%

Study of Polypyrrole-Coated MWCNT Nanocomposites for Ammonia Sensing at Room Temperature

Bachhav¹,

Patil²

2015

MSCE

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The nanocomposite of polypyrrole (PPy) and carboxylated multi-walled carbon nanotubes (MWCNT) was synthesized by in situ chemical oxidative polymerization method using HCl as a dopant and Ammonium persulphate (APS) as an oxidant. The MWCNTs were carboxylic functionalized and were ultrasonicated to obtain uniform dispersion within the PPy matrix. Surface morphology of nanocomposites was investigated by Field Emission Scanning Electron microscopy (FE-SEM) and revealed that the functionalized MWCNTs were well embedded. X-Ray diffraction (XRD), Fourier Transform Infrared (FT-IR) Spectroscopy, Raman spectroscopy and UV-Vis spectroscopy were used to characterize the synthesized PPy-MWCNT nanocomposite. It was found that in situ polymerized PPy layer matrix was formed on carboxylated MWCNT and there was uniform dispersion of MWCNTs within the PPy matrix with significant interaction between PPy and MWCNTs. The response of the prepared PPy-MWCNT nanocomposite sensors was studied in the form of sensitivity towards Ammonia gas (NH3). The synergistic effects of the PPy-coated MWCNTs improve the gas sensing properties. Results showed that the sensitivity increased with NH3 concentration and it was also affected by the MWCNT content in PPy matrix. Furthermore, the sensor in pellet form reported here is robust, cost effective and relatively stable at room temperature.

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“…Several works also mention the use of carbon nanotube-based sensors for the detection of ammonia [17][18][19], but CNTs without functionalization have poor chemical selectivity [20] and the resulting conducting architecture tends to have a poor structural stability when assembled without any binder or matrix [21]. This is why several researchers have experimented the functionalization of CNT by insulating polymers, like PMMA [22] chitosan [23], poly(lactic acid) PLA [24], or intrinsically-conducting polymers (ICP), like poly(pyrrole) (PPy) [25][26][27], poly(thiophene) (PEDOT) [27,28], or poly(aniline) (PANI) [27,28], which can lead to a positive synergy. However, it seems that reaching the ppb range of detection makes the use of nanostructured transducers compulsory, as only the few works using this strategy report such a high sensitivity.…”

Section: Introductionmentioning

confidence: 99%

vQRS Based on Hybrids of CNT with PMMA-POSS and PS-POSS Copolymers to Reach the Sub-PPM Detection of Ammonia and Formaldehyde at Room Temperature Despite Moisture

Sachan¹,

Castro

Choudhary³

et al. 2017

Chemosensors

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Nanocomposite-based quantum resistive vapour sensors (vQRS) have been developed from the assembly of hybrid copolymers of polyhedral oligomeric silsesquioxane (POSS) and poly(methyl methacrylate) (PMMA) or poly(styrene) (PS) with carbon nanotubes (CNT). The originality of the resulting conducting architecture is expected to be responsible for the ability of the transducer to detect sub-ppm concentrations of ammonia and formaldehyde at room temperature despite the presence of humidity. In particular, the boosting effect of POSS is evidenced in CNT-based nanocomposite vQRS. The additive fabrication by spraying layer-by-layer provides (sLbL) is an effective method to control the reproducibility of the transducers' chemo-resistive responses. In dry atmosphere, the two types of sensors showed a high sensitivity towards both hazardous gases, as they were able to detect 300 ppb of formaldehyde and 500 ppb of ammonia with a sufficiently good signal to noise ratio (SNR > 10). They also exhibited a quick response times less than 5 s for both vapours and, even in the presence of 100 ppm of water, they were able to detect small amounts of gases (1.5 ppm of NH 3 and 9 ppm of CH 2 O). The results suggest promising applications of POSS-based vQRS for air quality or volatolome monitoring.

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Thin film polypyrrole/SWCNTs nanocomposites-based NH3 sensor operated at room temperature

Cited by 104 publications

References 56 publications

Modulation of the organic heterojunction behavior, from electrografting to enhanced sensing properties

Modulation of the organic heterojunction behavior, from electrografting to enhanced sensing properties

Study of Polypyrrole-Coated MWCNT Nanocomposites for Ammonia Sensing at Room Temperature

vQRS Based on Hybrids of CNT with PMMA-POSS and PS-POSS Copolymers to Reach the Sub-PPM Detection of Ammonia and Formaldehyde at Room Temperature Despite Moisture

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