Synthesis of MWCNT/PPY nanocomposite using oxidation polymerization method and its employment in sensing such as CO2 and humidity

Kumar, Utkarsh; Yadav, B. C.; Haldar, Toton; Dixit, Chandra Kumar; Yadawa, Pramod Kumar

doi:10.1016/j.jtice.2020.08.026

Cited by 32 publications

(16 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The XRD patterns of the samples presented in Figure 2 indicate that the main diffraction peak positions were located at the (110), (101), (202), (021), (130), and (040) crystal planes of BiPO4, at 2θ values of 21.3°, 23.4°, 27.6°, 41.5° and 50.9° [39], respectively. Additionally, the diffraction peaks were observable at 2θ values of 22.3° and 26.8°, which corresponded to the crystalline planes of PPy and graphene [40,41]. These results indicated that PPy/BiPO4 and Gr/BiPO4 were successfully synthesized.…”

Section: Materials Characterizationsmentioning

confidence: 73%

Conductive Polymer (Graphene/PPy)–BiPO4 Composite Applications in Humidity Sensors

Zhu

Lin²,

Lin

et al. 2021

Polymers

View full text Add to dashboard Cite

In this particular experiment, a chain of conductive polymer graphene/polypyrrole (Gr/PPy) and BiPO4—or (Gr/PPy)–BiPO4—materials were prepared and used as moisture-sensitive materials. The structure and morphology of the conductive polymer (Gr/PPy)–BiPO4 materials were analyzed using an X-ray diffractometer, scanning electron microscopy, transmission electron microscopy, and energy-dispersive X-ray spectroscopy. Moreover, properties such as hysteresis loop, impedance, sensing response, and response and recovery time were calculated and evaluated using an inductance–capacitance–resistance analyzer. The data expressed that PPy/BiPO4, as prepared in this study, exhibited excellent sensing properties, with impedance changing by only a few orders of range. Furthermore, the response time and time of recovery were 340 s and 60 s, respectively, and negligible humidity hysteresis occurred at different relative humidities. Therefore, conductive PPy/BiPO4, as prepared in the present study, is an excellent candidate for application in humidity sensors.

show abstract

Section: Materials Characterizationsmentioning

confidence: 73%

Conductive Polymer (Graphene/PPy)–BiPO4 Composite Applications in Humidity Sensors

Zhu

Lin²,

Lin

et al. 2021

Polymers

View full text Add to dashboard Cite

show abstract

“…The decrement in the baseline resistance can be seen in Figure a, and the low baseline resistance shows a higher change in the resistance on exposure of target gas. In addition, the carboxylic acid as a functional group on CNTs assists in enhancing the activation sites on the composite surface, which captures ammonia molecules rapidly and strongly . These findings are consistent with the previously reported Ppy/f-MWCNTs nanocomposite-based sensor, implying that the Ppy/f-MWCNTs nanocomposite exhibits superior sensing characteristics to the pristine Ppy material.…”

Section: Resultsmentioning

confidence: 99%

Flexible, Low-Cost, and Room Temperature Ammonia Sensor Based on Polypyrrole and Functionalized MWCNT Nanocomposites in Extreme Bending Conditions

Lawaniya

Kumar

et al. 2023

ACS Appl. Polym. Mater.

View full text Add to dashboard Cite

We report a flexible and room temperature ammonia sensor based on polypyrrole/functionalized multiwalled carbon nanotubes (Ppy/f-MWCNTs). This nanocomposite has been synthesized by the in-situ chemical oxidative polymerization method and finally loaded on a transparent poly(vinylidene fluoride) (PVDF) membrane substrate. The entire flexible sensor fabrication process was cost-effective and easy to operate, making it ideal for commercial production on a wide scale. The optimized Ppy/f-MWCNT-based flexible sensor demonstrates improved sensing characteristics (26.5% for 100 ppm) with a low response time of 16 s and high response toward ammonia compared with pristine Ppy. In addition, high repeatability and long-term stability were also observed over a concentration range of 5–200 ppm. It shows high response toward ammonia among various gaseous analytes. Furthermore, the flexible sensor was mechanically robust and could produce a high response value even in extreme bending conditions. The flexible Ppy/f-MWCNT-based flexible sensors offer potential applications in advanced wearable devices to detect ammonia in the ambient environment.

show abstract

“…The variations in the theoretical parameters caused by interactions with different gases and MoS 2 /SnS were calculated using higher occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels and are also shown in Table . The parameters such as electronegativity, hardness/softness, and ionization potential were calculated using the formula mentioned in our previous papers. − In this analysis, we found that the band gap of the MoS 2 /SnS was reduced after NO 2 gas interaction. As a result of this decrement, the electrons in the conduction band begin to increase and the conductivity of the MoS 2 /SnS increases.…”

Section: Resultsmentioning

confidence: 99%

Revealing a Highly Sensitive Sub-ppb-Level NO₂ Gas-Sensing Capability of Novel Architecture 2D/0D MoS₂/SnS Heterostructures with DFT Interpretation

Kumar

Hsieh

Liu

et al. 2022

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

In this work, we use a chemical method to design novel 2D-material/0D-quantum dot (MoS2/SnS) heterostructures. Furthermore, the unique 2D/0D heterostructure enhanced the NO2 gas-sensing capability 3 times and increased the sensing recoverability by more than 90%. Advanced characterization tools such as SEM, TEM, XRD, and AFM confirm the formation of MoS2/SnS heterojunction nanomaterials. Using AFM data, the average thickness of the MoS2 layer was found to be 5 nm. The highest sensor response of 0.33 with good repeatability was observed at 250 ppb of NO2. Sensing characterization reveals the ultra-fast response time, that is, 74 s, at 50 ppb of NO2. The limit of detection for detecting NO2 was also found to be very low, that is, 0.54 ppb, by using MoS2/SnS heterostructures. The theoretical calculations based on density functional theory well corroborated and quantified the intermolecular interaction and gas adsorption on the surface of MoS2/SnS.

show abstract

Synthesis of MWCNT/PPY nanocomposite using oxidation polymerization method and its employment in sensing such as CO2 and humidity

Cited by 32 publications

References 29 publications

Conductive Polymer (Graphene/PPy)–BiPO4 Composite Applications in Humidity Sensors

Conductive Polymer (Graphene/PPy)–BiPO4 Composite Applications in Humidity Sensors

Flexible, Low-Cost, and Room Temperature Ammonia Sensor Based on Polypyrrole and Functionalized MWCNT Nanocomposites in Extreme Bending Conditions

Revealing a Highly Sensitive Sub-ppb-Level NO₂ Gas-Sensing Capability of Novel Architecture 2D/0D MoS₂/SnS Heterostructures with DFT Interpretation

Contact Info

Product

Resources

About

Synthesis of MWCNT/PPY nanocomposite using oxidation polymerization method and its employment in sensing such as CO2 and humidity

Cited by 32 publications

References 29 publications

Conductive Polymer (Graphene/PPy)–BiPO4 Composite Applications in Humidity Sensors

Conductive Polymer (Graphene/PPy)–BiPO4 Composite Applications in Humidity Sensors

Flexible, Low-Cost, and Room Temperature Ammonia Sensor Based on Polypyrrole and Functionalized MWCNT Nanocomposites in Extreme Bending Conditions

Revealing a Highly Sensitive Sub-ppb-Level NO2 Gas-Sensing Capability of Novel Architecture 2D/0D MoS2/SnS Heterostructures with DFT Interpretation

Contact Info

Product

Resources

About

Revealing a Highly Sensitive Sub-ppb-Level NO₂ Gas-Sensing Capability of Novel Architecture 2D/0D MoS₂/SnS Heterostructures with DFT Interpretation