Poly(n-vinylpyrrolidone-co-acrylonitrile-co-methacrylic acid)–graphene quantum dot conjugate: synthesis and characterization for sensing ammonia vapour

Upadhyaya, Samiran; Gogoi, Bedanta; Sarma, Neelotpal Sen

doi:10.1039/d0tc04912c

Cited by 9 publications

(9 citation statements)

References 48 publications

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“…By using the equation, 3.3σ/S, the LOD value was found to be 9 ppb, where σ and S are the relative standard deviation and slope of the calibration plot, respectively. 45 Although several HCl sensors based on various transduction mechanisms, including electrochemical, opto-chemical, optical, and colorimetry, 46−51 are reported in the literature, vapor-phase detection of HCl based on an AC impedance study was found to be the infrequent one among the others. Thus, PVA-supported NDI-10 film emerges as an advanced polymeric composite sensor based on AC impedance with a low LOD for HCl vapors.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…In order to calculate the limit of detection (LOD), the calibration curve was plotted against different concentrations against the change in Z values (Figure S9). By using the equation, 3.3σ/ S , the LOD value was found to be 9 ppb, where σ and S are the relative standard deviation and slope of the calibration plot, respectively . Although several HCl sensors based on various transduction mechanisms, including electrochemical, opto-chemical, optical, and colorimetry, − are reported in the literature, vapor-phase detection of HCl based on an AC impedance study was found to be the infrequent one among the others.…”

Section: Resultsmentioning

confidence: 99%

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Film-Based Electronic Volatile Acid Vapor Sensor with Ultrahigh Sensitivity for Real-Time Analysis

Bora

Barman

Sarma

et al. 2021

ACS Appl. Electron. Mater.

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Global industrialization leads to the discharge of harmful volatile acid vapors into the environment, causing damage to various forms of life. Therefore, the development of rapid sensing systems for monitoring of volatile acid vapors is of significance for a safe and clean environment. Herein, the properties of a conjugated organic moiety combined with a commercial economic polymer to obtain composite film are designed for the selective detection of volatile acid vapor, viz., hydrogen chloride. The excellent electrical behavior of the obtained film thus allows its efficient use as a smart sensor film for the detection of hydrogen chloride vapors with quick response, reversibility, and selectivity with a low detection limit of 9 ppb. Taking advantage of this remarkable behavior in response to acid vapors, we have designed an electronic prototype for on-field applications with visual detection of hydrogen chloride vapors in ambient conditions. Compared to the other exploited approaches for hydrogen chloride detection, the polymer-supported active-film-based prototype is simple, portable, and cost-effective and can be used for real-time monitoring.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Film-Based Electronic Volatile Acid Vapor Sensor with Ultrahigh Sensitivity for Real-Time Analysis

Bora

Barman

Sarma

et al. 2021

ACS Appl. Electron. Mater.

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“…Not only pristine QDs, but also composite QDs have been used in sensing studies [76][77][78][79][80][81]. Graphene QDs (GQDs) is a 0D nanoscale carbon material, consisting of monoor a few layers of carbon atoms [82].…”

Section: Resistive-based Gas Sensors On Composite Qdsmentioning

confidence: 99%

Resistive-Based Gas Sensors Using Quantum Dots: A Review

Mirzaei

Kordrostami

Shahbaz

et al. 2022

Sensors

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Quantum dots (QDs) are used progressively in sensing areas because of their special electrical properties due to their extremely small size. This paper discusses the gas sensing features of QD-based resistive sensors. Different types of pristine, doped, composite, and noble metal decorated QDs are discussed. In particular, the review focus primarily on the sensing mechanisms suggested for these gas sensors. QDs show a high sensing performance at generally low temperatures owing to their extremely small sizes, making them promising materials for the realization of reliable and high-output gas-sensing devices.

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“…This was believed for stable graphene dispersion with poly-N-vinyl-2-pyrrolidone (PNVP). Many reports are available on the fabrication or functionalization of graphene surfaces using NVP [37][38][39][40]. However, many of them include the preparation of graphene dispersions using graphene derivatives, such as graphene oxide and reduced graphene oxide [39,40].…”

Section: Introductionmentioning

confidence: 99%

“…Many reports are available on the fabrication or functionalization of graphene surfaces using NVP [37][38][39][40]. However, many of them include the preparation of graphene dispersions using graphene derivatives, such as graphene oxide and reduced graphene oxide [39,40]. Only a few reports are available on the exfoliation of graphite [37,38], which consists of many steps, including the exfoliation of graphite, the preparation of polyvinyl pyrrolidone, and the preparation of graphene dispersions.…”

Section: Introductionmentioning

confidence: 99%

Exfoliation and Noncovalent Functionalization of Graphene Surface with Poly-N-Vinyl-2-Pyrrolidone by In Situ Polymerization

et al. 2021

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Heteroatom functionalization on a graphene surface can endow the physical and structural properties of graphene. Here, a one-step in situ polymerization method was used for the noncovalent functionalization of a graphene surface with poly-N-vinyl-2-pyrrolidone (PNVP) and the exfoliation of graphite into graphene sheets. The obtained graphene/poly-N-vinyl pyrrolidone (GPNVP) composite was thoroughly characterized. The surface morphology of GPNVP was observed using field emission scanning electron microscopy and high-resolution transmission electron microscopy. Raman spectroscopy and X-ray diffraction studies were carried out to check for the exfoliation of graphite into graphene sheets. Thermogravimetric analysis was performed to calculate the amount of PNVP on the graphene surface in the GPNVP composite. The successful formation of the GPNVP composite and functionalization of the graphene surface was confirmed by various studies. The cyclic voltammetry measurement at different scan rates (5–500 mV/s) and electrochemical impedance spectroscopy study of the GPNVP composite were performed in the typical three-electrode system. The GPNVP composite has excellent rate capability with the capacitive property. This study demonstrates the one-pot preparation of exfoliation and functionalization of a graphene surface with the heterocyclic polymer PNVP; the resulting GPNVP composite will be an ideal candidate for various electrochemical applications.

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Poly(n-vinylpyrrolidone-co-acrylonitrile-co-methacrylic acid)–graphene quantum dot conjugate: synthesis and characterization for sensing ammonia vapour

Abstract: We report the biosynthesis of Graphene QDs and their composite with poly(n-vinylpyrrolidone-co-acrylonitrile-co-methacrylic acid) for efficient detection of ammonia with a detection limit of 0.232 ppm using a fabricated portable electronic device.

Cited by 9 publications

References 48 publications

Film-Based Electronic Volatile Acid Vapor Sensor with Ultrahigh Sensitivity for Real-Time Analysis

Film-Based Electronic Volatile Acid Vapor Sensor with Ultrahigh Sensitivity for Real-Time Analysis

Resistive-Based Gas Sensors Using Quantum Dots: A Review

Exfoliation and Noncovalent Functionalization of Graphene Surface with Poly-N-Vinyl-2-Pyrrolidone by In Situ Polymerization

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