Fabrication of tungsten oxide nanofibers via electrospinning for gasochromic hydrogen detection

Foroushani, Fatemeh Tavakoli; Tavanai, Hossein; Ranjbar, M.; Bahrami, S. Hajir

doi:10.1016/j.snb.2018.04.120

Cited by 27 publications

(9 citation statements)

References 38 publications

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“…Not only NWs but also nanofibers (NFs) can be used for gasochromic studies. Tavakoli et al [87] reported the gasochromic properties of PdCl 2 -decorated WO 3 nanofibers fabricated by electrospinning. Figure 11 reveals the changes in the color of NFs with time in the presence of different concentrations of hydrogen gas.…”

Section: Appl Sci 2019 9 X For Peer Review 6 Of 22mentioning

confidence: 99%

“…Color changes in WO3 nanofibers (NFs) when exposed to 1%, 2%, 3%, and 4% hydrogen. (Reprinted with permission from [87]). Color changes in WO 3 nanofibers (NFs) when exposed to 1%, 2%, 3%, and 4% hydrogen.…”

Section: Appl Sci 2019 9 X For Peer Review 6 Of 22mentioning

confidence: 99%

“…Color changes in WO 3 nanofibers (NFs) when exposed to 1%, 2%, 3%, and 4% hydrogen. (Reprinted with permission from [87]).…”

Section: Appl Sci 2019 9 X For Peer Review 6 Of 22mentioning

confidence: 99%

“…Color changes in WO3 nanofibers (NFs) when exposed to 1%, 2%, 3%, and 4% hydrogen. (Reprinted with permission from [87]). Gas sensors with nanorod (NR) morphology have been used for the gasochromic detection of hydrogen gas.…”

Section: Appl Sci 2019 9 X For Peer Review 6 Of 22mentioning

confidence: 99%

“…Illustration of the gasochromic mechanism of PdCl 2 -decorated WO 3 nanofibers. (Reprinted with permission from[87]). …”

mentioning

confidence: 99%

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Gasochromic WO3 Nanostructures for the Detection of Hydrogen Gas: An Overview

Mirzaei

Kim

et al. 2019

Applied Sciences

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Hydrogen is one of the most important gases that can potentially replace fossil fuels in the future. Nevertheless, it is highly explosive, and its leakage should be detected by reliable gas sensors for safe operation during storage and usage. Most hydrogen gas sensors operate at high temperatures, which introduces the risk of hydrogen explosion. Gasochromic WO3 sensors work based on changes in their optical properties and color variation when exposed to hydrogen gas. They can work at low or room temperatures and, therefore, are good candidates for the detection of hydrogen leakage with low risk of explosion. Once their morphology and chemical composition are carefully designed, they can be used for the realization of sensitive, selective, low-cost, and flexible hydrogen sensors. In this review, for the first time, we discuss different aspects of gasochromic WO3 gas sensor-based hydrogen detection. Pristine, heterojunction, and noble metal-decorated WO3 nanostructures are discussed for the detection of hydrogen gas in terms of changes in their optical properties or visible color. This review is expected to provide a good background for research work in the field of gas sensors.

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Section: Appl Sci 2019 9 X For Peer Review 6 Of 22mentioning

confidence: 99%

Section: Appl Sci 2019 9 X For Peer Review 6 Of 22mentioning

confidence: 99%

“…Color changes in WO 3 nanofibers (NFs) when exposed to 1%, 2%, 3%, and 4% hydrogen. (Reprinted with permission from [87]).…”

Section: Appl Sci 2019 9 X For Peer Review 6 Of 22mentioning

confidence: 99%

Section: Appl Sci 2019 9 X For Peer Review 6 Of 22mentioning

confidence: 99%

“…Illustration of the gasochromic mechanism of PdCl 2 -decorated WO 3 nanofibers. (Reprinted with permission from[87]). …”

mentioning

confidence: 99%

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Gasochromic WO3 Nanostructures for the Detection of Hydrogen Gas: An Overview

Mirzaei

Kim

et al. 2019

Applied Sciences

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Study on mechanism of hydrogen adsorption on WO₃, W₂₀O₅₈, and W₁₈O₄₉

Jiang

Xiao

et al. 2019

Int J of Quantum Chemistry

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The density functional theory (DFT) calculation of hydrogen adsorption on tungsten oxides and calculation of the crystal structure of WO 3 , W 20 O 58 , and W 18 O 49 were performed . These calculations suggest that the length of W-O bonds in WO 3 are 1.913 Å, the length of 66% W-O bonds in W 20 O 58 is 1.8 to 1.9 Å, and the length of 43.48% W-O bonds in W 18 O 49 is longer than 2.0 Å. The hydrate (WO 2 [OH] 2 ), as an autocatalyst in the hydrogen reduction process, was found in the particular adsorption configuration of W 18 O 49 . The WO 3 and W 20 O 58 were completely reduced within 40 to 60 minutes at a temperature of 1000 C and at a hydrogen flow rate of 200 mL/min, while W 18 O 49 was completely reduced within 20 to 40 minutes. The phase composition and micromorphology of raw material and production were studied by both X-ray diffraction analysis (XRD) and FE-SEM technology. The differences of the mechanism of hydrogen adsorption on WO 3 , W 20 O 58 , and W 18 O 49 were explored based on the density functional theory calculation and the hydrogen reduction experiments. K E Y W O R D S density functional theory, FE-SEM technology, hydrogen adsorption, tungsten oxides, X-ray diffraction analysis

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Substantially Accelerated Response and Recovery in Pd‐Decorated WO₃ Nanorods Gasochromic Hydrogen Sensor

Cho,

Suh,

Jeong

et al. 2024

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The development of hydrogen (H2) gas sensors is essential for the safe and efficient adoption of H2 gas as a clean, renewable energy source in the challenges against climate change, given its flammability and associated safety risks. Among various H2 sensors, gasochromic sensors have attracted great interest due to their highly intuitive and low power operation, but slow kinetics, especially slow recovery rate limited its further practical application. This study introduces Pd‐decorated amorphous WO3 nanorods (Pd‐WO3 NRs) as an innovative gasochromic H2 sensor, demonstrating rapid and highly reversible color changes for H2 detection. In specific, the amorphous nanostructure exhibits notable porosity, enabling rapid detection and recovery by facilitating effective H2 gas interaction and efficient diffusion of hydrogen ions (H+) dissociated from the Pd nanoparticles (Pd NPs). The optimized Pd‐WO3 NRs sensor achieves an impressive response time of 14 s and a recovery time of 1 s to 5% H2. The impressively fast recovery time of 1 s is observed under a wide range of H2 concentrations (0.2–5%), making this study a fundamental solution to the challenged slow recovery of gasochromic H2 sensors.

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Fabrication of tungsten oxide nanofibers via electrospinning for gasochromic hydrogen detection

Cited by 27 publications

References 38 publications

Gasochromic WO3 Nanostructures for the Detection of Hydrogen Gas: An Overview

Gasochromic WO3 Nanostructures for the Detection of Hydrogen Gas: An Overview

Study on mechanism of hydrogen adsorption on WO₃, W₂₀O₅₈, and W₁₈O₄₉

Substantially Accelerated Response and Recovery in Pd‐Decorated WO₃ Nanorods Gasochromic Hydrogen Sensor

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Fabrication of tungsten oxide nanofibers via electrospinning for gasochromic hydrogen detection

Cited by 27 publications

References 38 publications

Gasochromic WO3 Nanostructures for the Detection of Hydrogen Gas: An Overview

Gasochromic WO3 Nanostructures for the Detection of Hydrogen Gas: An Overview

Study on mechanism of hydrogen adsorption on WO3, W20O58, and W18O49

Substantially Accelerated Response and Recovery in Pd‐Decorated WO3 Nanorods Gasochromic Hydrogen Sensor

Contact Info

Product

Resources

About

Study on mechanism of hydrogen adsorption on WO₃, W₂₀O₅₈, and W₁₈O₄₉

Substantially Accelerated Response and Recovery in Pd‐Decorated WO₃ Nanorods Gasochromic Hydrogen Sensor