CNTs based improved chlorine sensor from non-covalently anchored multi-walled carbon nanotubes with hexa-decafluorinated cobalt phthalocyanines

Sharma, Anshul Kumar; Mahajan, Aman; Bedi, R. K.; Kumar, Subodh; Debnath, A.K.; Aswal, D. K.

doi:10.1039/c7ra08987b

Cited by 31 publications

(8 citation statements)

References 56 publications

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Section: Gas Sensingmentioning

confidence: 87%

“…This particular case revealed a strong influence of central metal cation inside the macrocyclic core on the sensing ability of recognition element. The lowest LOD = 0.04 ppb was achieved in case of cobalt(II) phthalocyanine and SWCNTs-COOH in comparison to 0.27 ppb for copper(II)Pc and 0.06 for zinc(II)Pc [66][67][68][69]. Among common air pollutants, hydrogen sulfide (H2S) is a widespread toxic and flammable gas, produced in biodegradation processes in the petroleum industry and as a by-product of bacterial decomposition of human and animal feces.…”

Section: Gas Sensingmentioning

confidence: 99%

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Azaporphyrins Embedded on Carbon-Based Nanomaterials for Potential Use in Electrochemical Sensing—A Review

2021

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Phthalocyanines and porphyrazines as macrocyclic aza-analogues of well-known porphyrins were deposited on diverse carbon-based nanomaterials and investigated as sensing devices. The extended π-conjugated electron system of these macrocycles influences their ability to create stable hybrid systems with graphene or carbon nanotubes commonly based on π–π stacking interactions. During a 15-year period, the electrodes modified by deposition of these systems have been applied for the determination of diverse analytes, such as food pollutants, heavy metals, catecholamines, thiols, glucose, peroxides, some active pharmaceutical ingredients, and poisonous gases. These procedures have also taken place, on occasion, in the presence of various polymers, ionic liquids, and other moieties. In the review, studies are presented that were performed for sensing purposes, involving azaporphyrins embedded on graphene, graphene oxide or carbon nanotubes (both single and multi-walled ones). Moreover, possible methods of electrode fabrication, limits of detection of each analyte, as well as examples of macrocyclic compounds applied as sensing materials, are critically discussed.

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Section: Gas Sensingmentioning

confidence: 87%

Section: Gas Sensingmentioning

confidence: 99%

Azaporphyrins Embedded on Carbon-Based Nanomaterials for Potential Use in Electrochemical Sensing—A Review

2021

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“…[28,29] MPc possess a variety of remarkable properties, such as excellent thermal stability (up to 400 C), tunability of physical and chemical properties, semiconducting behavior, etc., [30][31][32][33][34] and are reported to be excellent sensing materials with high sensitivity, good selectivity, and quick response. [33,35,36] Therefore, graphene noncovalently functionalized by MPc holds great potential in gas sensing application.…”

Section: Introductionmentioning

confidence: 99%

Machine Learning‐Enabled Smart Gas Sensing Platform for Identification of Industrial Gases

Huang

Panes-Ruiz

Khavrus³

et al. 2022

Advanced Intelligent Systems

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Both ammonia and phosphine are widely used in industrial processes, and yet they are noxious and exhibit detrimental effects on human health. Despite the remarkable progress on sensors development, there are still some limitations, for instance, the requirement of high operating temperatures, and that most sensors are solely dedicated to individual gas monitoring. Herein, an ultrasensitive, highly discriminative platform is demonstrated for the detection and identification of ammonia and phosphine at room temperature using a graphene nanosensor. Graphene is exfoliated and successfully functionalized by copper phthalocyanine derivate. In combination with highly efficient machine learning techniques, the developed graphene nanosensor demonstrates an excellent gas identification performance even at ultralow concentrations: 100 ppb NH3 (accuracy—100.0%, sensitivity—100.0%, specificity—100.0%) and 100 ppb PH3 (accuracy—77.8%, sensitivity—75.0%, and specificity—78.6%). Molecular dynamics simulation results reveal that the copper phthalocyanine derivate molecules attached to the graphene surface facilitate the adsorption of ammonia molecules owing to hydrogen bonding interactions. The developed smart gas sensing platform paves a path to design a highly selective, highly sensitive, miniaturized, low‐power consumption, nondedicated, smart gas sensing system toward a wide spectrum of gases.

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“…Phthalocyanines (Pc) and their metal derivatives are p-type semiconductors and have been widely used as gas sensor [Philip et al, 2003;sharma et al, 2017]. During recent past, vacuum deposited thin films of metal-phthalocyanine (MPc) have been utilized for detection of CHCl3 and other vapors.…”

Section: Introductionmentioning

confidence: 99%

Metal-Phthalocyanine Functionalized CNTs Sensor for Chloroform Series

Saxena¹

2019

EJEST

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In this paper, We report fabrication of sensors from multiwalled carbon nanotube (MWCNT) functionalized with metalphthalocyanines (M-Pc or Cu-Phs). We made very sensitive ans selective sensor for Chloroform. We had characterized the material using FTIR and TEM techniques. We inferred that the metal-Pc form nanoclusters around the surface of f-MWNTs and the sensors prepared from these materials show resistivity in the kilo-ohm range. Our sensors show sensing capability of 100 ppm and the response as well as recovery times of few seconds. We observed interesting behaviour of the sensors made from M-Pc on exposure to chloroform (CHCl3) vapours while for many other vopours like carbon tetra chloride (CCl4), dichloromethane (CH2Cl2), clorine water (Cl2) showed opposite results after the exposure on these sensors. We shall discuss the differences in the response and recovery time, and mechanism of sensing for chloroform and other vapours.

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CNTs based improved chlorine sensor from non-covalently anchored multi-walled carbon nanotubes with hexa-decafluorinated cobalt phthalocyanines

Abstract: To study the effect of synergetic interactions between metal-phthalocyanine and carbon nanotubes for gas sensing characteristics of carbon nanotubes, we have synthesized F16CoPc/MWCNTs–COOH hybrid.

Cited by 31 publications

References 56 publications

Azaporphyrins Embedded on Carbon-Based Nanomaterials for Potential Use in Electrochemical Sensing—A Review

Azaporphyrins Embedded on Carbon-Based Nanomaterials for Potential Use in Electrochemical Sensing—A Review

Machine Learning‐Enabled Smart Gas Sensing Platform for Identification of Industrial Gases

Metal-Phthalocyanine Functionalized CNTs Sensor for Chloroform Series

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