Characterization of Flexible Multi-Walled Carbon Nanotubes Network Sensor to Freon Gas Detection

Al-Makram, Nisreen M.; Saleh, Wasan R.

doi:10.24996/ijs.2021.62.8.7

Cited by 6 publications

(3 citation statements)

References 11 publications

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“…The spectra show a special peak of MWCNTs-OH that appears at the angle of 2𝜃 =26.400 ° which belong to the (002) plane,other peaks are seen to demonstrate a characteristic of the embedded NP S . The spectrum of MWCNTs-OH embedded with (PANI,PPy) NPs shows diffraction peak at angle of (2θ=25.85 00 ˚, 2θ=25.9000 ˚),which belongs to (002) plane shown in table (3).Table (2) represents the values of (2θ) of the peaks and structural parameters of the networks. The particle size and morphology of the pure MWCNTs-OH were studied using the scanning electron microscope.…”

Section: Resultsmentioning

confidence: 99%

“…The results revealed that the sensitivity increases when doped with PANI and PPy NP s . Saleh, prepared MWCNTs-OH was used to a flexible gas sensor by deposition as a network on a filter cake using the method of filtration from suspension (FFS) [3].Gas sensors are usually classified as chemical detectors. It includes a transducer and an active layer, which converts the desired chemical reactions to an electronic signal, for example, resistance change, voltage, current, or frequency [4].…”

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confidence: 99%

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Selectivity and Sensitivity of Multi-Walled Carbon Nanotubes for NO2 Gas Sensor

Makram

2023

JK-Physics

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The flexible gas sensor was fabricated using functionalized multi-walled carbon nanotubes (MWCNTs-OH) suspension deposited on filter cake by employing the filtration from suspension (FFS) method and embedded with (polyaniline and polypyrrole) nanoparticles (PANI, PPy) NPs. MWCNTs-OH network showed a decrease in resistance upon exposure to the NO2 gas in comparison with air. The structural and morphological characteristics of the film were investigated using (XRD), (AFM) and (SEM ). The sensitivity was measured for the fabricated gas sensor at room temperature pure and embedded lattice with metallic nanoparticles after exposure to NO2 gas at concentration of about 25 ppm. The results revealed that the sensitivity increases when doped with PANI and PPy NPs.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%

Selectivity and Sensitivity of Multi-Walled Carbon Nanotubes for NO2 Gas Sensor

Makram

2023

JK-Physics

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“…Today, many studies focus on preparing films from carbon nanotubes and improving their properties by adding conductive polymers and metal nanoparticles [11][12][13]. Present work involves synthesizing multi-walled carbon nanotubes networks coated with a conductive polymer (PPy) and PPy doped with metallic nanoparticles (Ag and Cu) separately.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Characterization of Functionalized Multi-Wall Carbon Nanotubes Flexible Network Modified by a Layer of Polypyrrole Conductive Polymer and Metallic Nanoparticles

Taradh

Saleh

2022

NHC

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Short Multi-Walled Carbon Nanotubes functionalized with OH group (MWCNTs-OH) were used to synthesize flexible MWCNTs networks. The MWCNTs suspension was synthesized using Benzoquinone (BQ) and N, N Dimethylformamide alcohol (DMF) in specific values and then deposited on filter paper by filtration from suspension (FFS) method. Polypyrrole (PPy) conductive polymer doped with metallic nanoparticles (MNPs) prepared using in-situ chemical polymerization method. To improve the properties of the MWCNTs networks, a coating layer of (PPy) conductive polymer, PPy:Ag nanoparticles, and PPy: Cu nanoparticles were applied to the network. The fabricated networks were characterized using an X-ray diffractometer (XRD), UV-Vis. spectrometer, and Atomic Force Microscope (AFM). XRD results revealed that the broadening for the (002) peak decreased after being coated with PPy and increased for the doped samples with MNPs, indicating on decrease in the crystalline size (MWCNTs/PPy) sample and increasing for doped ones with Ag and Cu MNPs. AFM images revealed that the surface roughness of the MWCNTs-OH network decreased after being coated with PPy, PPy: Ag, and PPy: Cu. With the help of AFM and XRD results, the CNTs contain 14 layers, while the inner and outer diameters were 18.2 nm and 27 nm receptivity. The UV-Vis. spectrum of MWCNTs showed several peaks, the highest in the 350 nm range. The coated of MWCNTs greatly affected the absorption spectrum, with many bands appearing between 300 to 450 nm and increasing the absorbance along the overall spectrum. For samples doped with Ag NPs and Cu NPs, a weak absorption peak of the plasmonic resonance frequency of the metallic nanoparticles. Analysis of Raman spectra shows that (ID/IG) ratios for all networks are less than one, which prove that the fabricated networks have few impurities and have good homogeneity. This work aimed to synthesize and characterize a flexible MWCNTs network and develop it by coated with a layer of conductive polymer and metallic nanoparticles for gas sensing application using quick and straightforward preparation methods.

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Measurement of response time and recovery time of the sensor embedded with Pt-CNT active when exposed to NH3 gas at different temperature

Al-Makram¹

2023

Proceedings of the 1st International Conference on Frontier of Digital Technology Towards a Sustainable Society

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Characterization of Flexible Multi-Walled Carbon Nanotubes Network Sensor to Freon Gas Detection

Cited by 6 publications

References 11 publications

Selectivity and Sensitivity of Multi-Walled Carbon Nanotubes for NO2 Gas Sensor

Selectivity and Sensitivity of Multi-Walled Carbon Nanotubes for NO2 Gas Sensor

Fabrication and Characterization of Functionalized Multi-Wall Carbon Nanotubes Flexible Network Modified by a Layer of Polypyrrole Conductive Polymer and Metallic Nanoparticles

Measurement of response time and recovery time of the sensor embedded with Pt-CNT active when exposed to NH3 gas at different temperature

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