Nanomaterial-based VOC sensing applications and a deep dive into their developmental trends

Rosario, Warren; Singh, Pravin Kumar; Tiwari, Ashutosh; Jain, Utkarsh; Avasthi, Devesh Kumar; Chauhan, Nidhi

doi:10.1039/d3ta07171e

Cited by 4 publications

(1 citation statement)

References 228 publications

(231 reference statements)

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“…Owing to these factors, organizations, such as the World Health Organization and the Environmental Protection Agency, have issued guidelines to limit the concentration of VOCs in indoor and workplace environments. The detection and monitoring of harmful/polluting VOCs in the environment to ensure public safety; the detection of disease-specific VOCs for advancing the medical field by achieving noninvasive diagnostic procedures; last in the monitoring of VOCs emitted by food products, which can help in assessing the quality of food and implementing preventive measures to avoid food wastage. , To address these issues, the detection and monitoring of VOCs have found practical applications across diverse fields, such as public safety, environmental surveillance, food production, and health management.…”

Section: Introductionmentioning

confidence: 99%

Rhodamine-Based Electrospun Polyacrylonitrile (PAN) Nanofiber Sensor for the Detection of Chlorinated Hydrocarbon Vapors

Capan,

Bayrakci

2024

ACS Appl. Polym. Mater.

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This study is the first report on the fabrication of polyacrylonitrile (PAN) nanofiber with rhodamine-based chemosensor (RHE) onto a mass-sensitive quartz crystal substrate using the electrospinning method and its sensing capability toward chlorinated hydrocarbons. Fabricated nanofiber webs via the electrospinning process are characterized by Fourier Transform Infrared (FTIR-ATR), Scanning Electron Microscopy, and Contact Angle measurement techniques, respectively. In order to investigate the vapor sensor properties, a Quartz Crystal Microbalance (QCM) system is employed to collect the real-time experimental data when the nanofiber sensor PAN-RHE is exposed to chlorinated hydrocarbons. Pseudo first-order and Elovich models are applied to elucidate the adsorption behavior. The morphological characterization proved smooth surface morphology without bead formation for all fibers with uniformity in the fiber skeleton. The average diameters of neat PAN and PAN nanofibers with RHE are found to be 449 and 790 nm, respectively. The nanofiber sensor PAN-RHE exhibits excellent sensing characteristics, including a high sensitivity of 0.0276 Hz/ppm, response and recovery times of 2−3 and 5−7 s, respectively, high selectivity for chloroform compared to other vapors tested, a limit of detection (LOD) of about 119.56 ppm, and a limit of quantification (LOQ) of about 362.31 ppm with a good reproducibility. The Pseudo-first-order adsorption rate and the Elovich desorption constants are determined as a function of different concentrations. The results obtained suggest that the QCM-based nanofiber sensor PAN-RHE shows great potential for the design of highly sensitive and selective chloroform sensors.

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Section: Introductionmentioning

confidence: 99%

Rhodamine-Based Electrospun Polyacrylonitrile (PAN) Nanofiber Sensor for the Detection of Chlorinated Hydrocarbon Vapors

Capan,

Bayrakci

2024

ACS Appl. Polym. Mater.

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Borophene-based nanomaterials: Promising candidates for next-generation gas/vapor chemiresistors

Chaudhary,

Sonu,

Taha

et al. 2024

Journal of Materials Science & Technology

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Nanofibrous Conductive Sensor for Limonene: One-Step Synthesis via Electrospinning and Molecular Imprinting

Macagnano,

Molinari,

Papa

et al. 2024

Nanomaterials

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Detecting volatile organic compounds (VOCs) emitted from different plant species and their organs can provide valuable information about plant health and environmental factors that affect them. For example, limonene emission can be a biomarker to monitor plant health and detect stress. Traditional methods for VOC detection encounter challenges, prompting the proposal of novel approaches. In this study, we proposed integrating electrospinning, molecular imprinting, and conductive nanofibers to fabricate limonene sensors. In detail, polyvinylpyrrolidone (PVP) and polyacrylic acid (PAA) served here as fiber and cavity formers, respectively, with multiwalled carbon nanotubes (MWCNT) enhancing conductivity. We developed one-step monolithic molecularly imprinted fibers, where S(−)-limonene was the target molecule, using an electrospinning technique. The functional cavities were fixed using the UV curing method, followed by a target molecule washing. This procedure enabled the creation of recognition sites for limonene within the nanofiber matrix, enhancing sensor performance and streamlining manufacturing. Humidity was crucial for sensor working, with optimal conditions at about 50% RH. The sensors rapidly responded to S(−)-limonene, reaching a plateau within 200 s. Enhancing fiber density improved sensor performance, resulting in a lower limit of detection (LOD) of 137 ppb. However, excessive fiber density decreased accessibility to active sites, thus reducing sensitivity. Remarkably, the thinnest mat on the fibrous sensors created provided the highest selectivity to limonene (Selectivity Index: 72%) compared with other VOCs, such as EtOH (used as a solvent in nanofiber development), aromatic compounds (toluene), and two other monoterpenes (α-pinene and linalool) with similar structures. These findings underscored the potential of the proposed integrated approach for selective VOC detection in applications such as precision agriculture and environmental monitoring.

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Nanomaterial-based VOC sensing applications and a deep dive into their developmental trends

Abstract: Volatile organic compounds (VOCs) are emitted as gases from solids and liquids. A large number of objects around us are always emitting VOCs into the atmosphere. VOC emission sources are...

Cited by 4 publications

References 228 publications

Rhodamine-Based Electrospun Polyacrylonitrile (PAN) Nanofiber Sensor for the Detection of Chlorinated Hydrocarbon Vapors

Rhodamine-Based Electrospun Polyacrylonitrile (PAN) Nanofiber Sensor for the Detection of Chlorinated Hydrocarbon Vapors

Borophene-based nanomaterials: Promising candidates for next-generation gas/vapor chemiresistors

Nanofibrous Conductive Sensor for Limonene: One-Step Synthesis via Electrospinning and Molecular Imprinting

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