Fiber optic volatile organic compound gas sensors: A review

Zhao, Yong; Liu, Yingxuan; Han, Bo; Wang, Mingyue; Wang, Qi; Zhang, Ya‐nan

doi:10.1016/j.ccr.2023.215297

Cited by 30 publications

(2 citation statements)

References 255 publications

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“…To date, optical gas sensors have become widespread in recent years due to their unique properties. Optical VOC sensors can operate at room temperature, are highly resistant to electromagnetic radiation, and are portable and simple to use compared to traditional electrical resistive gas sensors, which require a heating component for high-temperature functioning [22][23][24][25]. Given the advances in nanomaterial technology combined with innovative synthesis methods, it has been possible to create affordable and small sensing devices with a higher sensitivity and selectivity for acetone.…”

Section: Introductionmentioning

confidence: 99%

Electrospun SnO2/WO3 Heterostructure Nanocomposite Fiber for Enhanced Acetone Vapor Detection

Lin,

Chang,

Hsieh

et al. 2023

Polymers

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Volatile organic compounds (VOCs), often invisible but potentially harmful, are prevalent in industrial and laboratory settings, posing health risks. Detecting VOCs in real-time with high sensitivity and low detection limits is crucial for human health and safety. The optical sensor, utilizing the gasochromic properties of sensing materials, offers a promising way of achieving rapid responses in ambient environments. In this study, we investigated the heterostructure of SnO2/WO3 nanoparticles and employed it as the primary detection component. Using the electrospinning technique, we fabricated a sensing fiber containing Ag NPs, poly(methyl methacrylate) (PMMA), and SnO2/WO3 (PMMA-Ag-SnO2/WO3) for acetone vapor detection. Following activation via UV/ozone treatment, we observed charge migration between WO3 and SnO2, resulting in a substantial generation of superoxide radicals on SnO2 nanoparticles. This phenomenon facilitates structural deformation of the fiber and alters the oxidation state of tungsten ions, ultimately leading to a significant change in extinction when exposed to acetone vapor. As a result, PMMA-Ag-SnO2/WO3 fiber achieves a detection limit of 100 ppm and a response time of 1.0 min for acetone detection. These findings represent an advancement in the development of sensitive and selective VOC sensing devices.

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Section: Introductionmentioning

confidence: 99%

Electrospun SnO2/WO3 Heterostructure Nanocomposite Fiber for Enhanced Acetone Vapor Detection

Lin,

Chang,

Hsieh

et al. 2023

Polymers

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“…In the last decades, many investigations have been devoted to hazardous gas detection technology in order to sustain its wide usage in various fields, such as healthcare, industrial safety, and environmental monitoring. , Within the functioning principles, different types of gas detection technology based on chemo-resistive, surface acoustic wave, optical, gas chromatography, and electrochemical sensors have been explored. , Among these detectors, chemo-resistive-type gas sensors based on metal oxide semiconductors (MOS) were found to be the most preferable solution for future applications due to their outstanding electrochemical, physical, and gas-sensing properties . The advantages such as lengthy lifespan, ecofriendliness, easy miniaturization, recyclability, low-cost enhancement of mass production, and environmental sustainability of the product.…”

mentioning

confidence: 99%

Sensitivity Enhancement of CO₂ Sensors at Room Temperature Based on the CZO Nanorod Architecture

Soltabayev,

Raiymbekov,

Nuftolla

et al. 2024

ACS Sens.

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Cobalt-doped ZnO (CZO) thin films were deposited on glass substrates at room temperature by radio frequency (RF) magnetron sputtering of a single target prepared with ZnO and Co 3 O 4 powders. Changes in the crystallinity, morphology, optical properties, and chemical composition of the CZO thin films were investigated at various sputtering powers of 45, 60, and 75 W. All samples presented a hexagonal wurtzite-type structure with a preferential c-axis at the (002) plane, along with a distinct change in the strain values through X-ray diffraction patterns. Scanning electron and atomic force microscopy revealed uniform and dense deposition of nanorod CZO samples with a high surface roughness (RMS). The Hall mobility and carrier concentration increased with the introduction of Co + ions into the ZnO matrix, as seen from the Hall effect study. The gradual increase of the power applied on the target source significantly affected the morphology of the CZO thin film, which is reflected in the CO 2 -sensing performance. The best gas response to CO 2 was recorded for CZO-60 W with a response of 1.45 for 500 ppm CO 2 , and the response/recovery times were 72 and 35 s, respectively. The distinguishing feature of the CZO sensor is its ability to effectively and rapidly detect the CO 2 target gas at room temperature (∼27 °C, RT).

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The impact of Activation on the Performance of Optical Oxygen Sensing with the Luminescent Metal–Organic Framework MOF‐76(Eu)

Kasper,

Burkhart,

Müller‐Buschbaum

2024

ChemPhotoChem

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The influence of activation as key parameter for oxygen sensing by luminescent metal‐organic frameworks has been investigated and quantified for the archetype MOF‐76(Eu). Activation at different conditions (regarding temperature and solvent‐exchange for distinct vacuum pressure and heating time), shows an influence on the overall quenching, response time and cyclability due to different pore accessibility and surface area and therefore on the overall performance of the sensor. The optical sensing process is based on luminescence quenching, analyzed from high vacuum (10−7 bar) to dosing oxygen from 0.01 bar to 1 bar. Strong influence of the different activation parameters is observed, as MOF‐76(Eu) activated at 50 °C shows some quenching of the luminescence intensity within 30 min, while methanol‐exchange and subsequent activation at 250 °C leads to a quenching rate of 98.6%. In addition, the sensor response occurs more than 1000 times faster within 0.2 s. These results correlate well with physisorption data, which reveal a significant change in porosity and surface area according to the degree of activation. For a better understanding of the involved processes, adsorption isotherms were recorded, surface areas determined and correlated to the photophysical parameters, including Stern‐Volmer kinetics and cycling experiments for the differently activated MOF sensors

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Fiber optic volatile organic compound gas sensors: A review

Cited by 30 publications

References 255 publications

Electrospun SnO2/WO3 Heterostructure Nanocomposite Fiber for Enhanced Acetone Vapor Detection

Electrospun SnO2/WO3 Heterostructure Nanocomposite Fiber for Enhanced Acetone Vapor Detection

Sensitivity Enhancement of CO₂ Sensors at Room Temperature Based on the CZO Nanorod Architecture

The impact of Activation on the Performance of Optical Oxygen Sensing with the Luminescent Metal–Organic Framework MOF‐76(Eu)

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Fiber optic volatile organic compound gas sensors: A review

Cited by 30 publications

References 255 publications

Electrospun SnO2/WO3 Heterostructure Nanocomposite Fiber for Enhanced Acetone Vapor Detection

Electrospun SnO2/WO3 Heterostructure Nanocomposite Fiber for Enhanced Acetone Vapor Detection

Sensitivity Enhancement of CO2 Sensors at Room Temperature Based on the CZO Nanorod Architecture

The impact of Activation on the Performance of Optical Oxygen Sensing with the Luminescent Metal–Organic Framework MOF‐76(Eu)

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Product

Resources

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Sensitivity Enhancement of CO₂ Sensors at Room Temperature Based on the CZO Nanorod Architecture