High sensitivity carbon monoxide detector using iron tetraphenyl porphyrin functionalized reduced graphene oxide

Shirsat, Sumedh M.; Chiang, Chih-Hao; Bodkhe, Gajanan A.; Shirsat, Mahendra D.; Tsai, Meng‐Lin

doi:10.1186/s11671-023-03813-9

Cited by 14 publications

(4 citation statements)

References 49 publications

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“…indicates the C=C skeleton of graphite [23]. Two additional peaks were observed at 2926 cm -1 and 2858 cm -1 wavelength because of the stretching mode of methyl group (-CH2) in the alkyl chain [22].…”

Section: Characterization Of Reduced Graphene Oxidementioning

confidence: 99%

Experimental Study on the Removal of Chromium (III) Ions Using Synthesized Reduced Graphene Oxide (RGO)

Azam,

Deb,

Hossain

et al. 2023

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Tanning industries release chromium-based effluents directly into the environment putting the whole ecosystem at risk. As a result, the wastewater must be properly treated before being released. Reduced Graphene oxide (RGO), a graphene material having adsorption capacity, is prepared, characterized, and applied to Chromium (III) effluent (synthetic effluent-SE) to determine its efficiency and adsorption capacity (AC). RGO was characterized by TGA, SEM images, XDR, and FTIR analysis. It was a well-developed adsorbent because of its high thermal stability, wrinkled topology, the disappearance of broad peak at 2-theta angle 10.049° present in GO, and the presence of oxygen-containing functional group respectively. A batch experiment has been carried out at different adsorbent doses, contact times, and pH on the effluent. About 90.31% removal efficiency was found within 10 minutes when the absorption capacity was 180.61mg/g. Therefore, isotherm and adsorption kinetics of chromium ions on the RGO surfaces were studied to understand the different aspects of adsorption capability. The result showed that the process was favourable for adsorption. RGO suggested monolayer adsorption because it followed the Langmuir Isotherm more closely than the Freundlich isotherm model. Additionally, it was more compatible with the intraparticle diffusion (IPD) and pseudo-second-order (PSO) models. The findings demonstrated that RGO has great potential as an adsorbent for efficiently and swiftly removing chromium ions from wastewater.

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Section: Characterization Of Reduced Graphene Oxidementioning

confidence: 99%

Experimental Study on the Removal of Chromium (III) Ions Using Synthesized Reduced Graphene Oxide (RGO)

Azam,

Deb,

Hossain

et al. 2023

Text Leather Rev

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“…With the increase in temperature, the bond between CuO and oxygen ions becomes stronger and different oxygen ions become active (Eqs. [4][5][6]. O 2 (air) represents the ambient atmosphere which accepts electrons from the conduction band of CuO.…”

Section: Sensing Mechanismmentioning

confidence: 99%

“…Hazardous gases include nitrogen dioxide (NO 2 ), methanol (CH 3 OH), carbon dioxide (CO 2 ), nitrous oxide (N 2 O), carbon monoxide (CO), ammonia (NH 3 ), hydrogen sulphide (H 2 S), ethanol (CH 3 CH 2 OH), formaldehyde (HCHO) etc. [2][3][4][5]. Amongst these gases, nitrogen dioxide is an extremely hazardous and detrimental gas that is mainly produced by industries and automobiles [6].…”

Section: Introductionmentioning

confidence: 99%

Low ppm NO2 detection through advanced ultrasensitive copper oxide gas sensor

Sihag,

Dahiya,

Rani

et al. 2024

Discover Nano

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The imperative development of a cutting-edge environmental gas sensor is essential to proficiently monitor and detect hazardous gases, ensuring comprehensive safety and awareness. Nanostructures developed from metal oxides are emerging as promising candidates for achieving superior performance in gas sensors. NO2 is one of the toxic gases that affects people as well as the environment so its detection is crucial. The present study investigates the gas sensing capability of copper oxide-based sensor for 5 ppm of NO2 gas at 100 °C. The sensing material was synthesized using a facile precipitation method and characterized by XRD, FE-SEM, UV–visible spectroscopy, photoluminescence spectroscopy, XPS and BET techniques. The developed material shows a response equal to 67.1% at optimal temperature towards 5 ppm NO2 gas. The sensor demonstrated an impressive detection limit of 300 ppb, along with a commendable percentage response of 5.2%. Under optimized conditions, the synthesized material demonstrated its high selectivity, as evidenced by the highest percentage response recorded for NO2 gas among NO2, NH3, CO, CO2 and H2S.

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“…Reduced graphene oxide modified with rose Bengal dye forms chemoresistive sensors for the vapors of ammonia, ethanol and acetone [22]. Metal-coordinated porphyrins [23][24][25] and phthalocyanines [26][27][28] were also proposed for ammonia sensing with good selectivity in presence of other gases such as CO 2 , SO 2 , NO 2 , H 2 S, etc.…”

Section: Introductionmentioning

confidence: 99%

Covalent surface modification of single-layer graphene-like BC₆N nanosheets with reactive nitrenes for selective ammonia sensing via DFT modeling

Baachaoui,

Hajlaoui,

Aoun

et al. 2024

Nanotechnology

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Novel graphene-like nanomaterials with a non-zero bandgap are important for the design of gas sensors. The selectivity toward specific targets can be tuned by introducing appropriate functional groups on their surfaces. In this study, we use first-principles simulations to investigate the covalent functionalization of single-layer graphitized BC6N with azides to yield aziridine-functionalized adducts and explore their possible use to realize ammonia sensors. First, we determine the most favorable sites for physical adsorption and chemical reaction of methylnitrene, arising from the decomposition of methylazide, onto a BC6N monolayer. Then, we examine the thermodynamics of the [1+2]–cycloaddition reaction of various phenylnitrenes and perfluorinated phenylnitrenes para-substituted with (R = CO2H, SO3H) groups, demonstrating a favorable energetics. We also monitor the effect of the functionalization on the electronic properties of the nanosheets via density of states (DOS) and band structure analyses. Finally, we test four dBC6N to gBC6N substrates in the sensing of ammonia. We show that, thanks to their hydrogen bonding capabilities, the functionalized BC6N can selectively detect ammonia, with interaction energies varying from –0.541 eV to –1.371 eV, even in presence of competing gas such as CO2 and H2O, as also confirmed by analyzing the change in the electronic properties and the values of recovery times near ambient temperature. Importantly, we model the conductance of a selected substrate alone and in presence of NH3 to determine its effect on the integrated current, showing that humidity and coverage conditions should be properly tuned to use HO3S-functionalized BC6N-based nanomaterials to develop selective gas sensors for ammonia.

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High sensitivity carbon monoxide detector using iron tetraphenyl porphyrin functionalized reduced graphene oxide

Cited by 14 publications

References 49 publications

Experimental Study on the Removal of Chromium (III) Ions Using Synthesized Reduced Graphene Oxide (RGO)

Experimental Study on the Removal of Chromium (III) Ions Using Synthesized Reduced Graphene Oxide (RGO)

Low ppm NO2 detection through advanced ultrasensitive copper oxide gas sensor

Covalent surface modification of single-layer graphene-like BC₆N nanosheets with reactive nitrenes for selective ammonia sensing via DFT modeling

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High sensitivity carbon monoxide detector using iron tetraphenyl porphyrin functionalized reduced graphene oxide

Cited by 14 publications

References 49 publications

Experimental Study on the Removal of Chromium (III) Ions Using Synthesized Reduced Graphene Oxide (RGO)

Experimental Study on the Removal of Chromium (III) Ions Using Synthesized Reduced Graphene Oxide (RGO)

Low ppm NO2 detection through advanced ultrasensitive copper oxide gas sensor

Covalent surface modification of single-layer graphene-like BC6N nanosheets with reactive nitrenes for selective ammonia sensing via DFT modeling

Contact Info

Product

Resources

About

Covalent surface modification of single-layer graphene-like BC₆N nanosheets with reactive nitrenes for selective ammonia sensing via DFT modeling