Two-step hydrothermal fabrication of CeO2-loaded MoS2 nanoflowers for ethanol gas sensing application

Zhang, Jianhua; Li, Tingting; Guo, Jingyu; Hu, Yaqing; Zhang, Dongzhi

doi:10.1016/j.apsusc.2021.150942

Cited by 54 publications

(17 citation statements)

References 62 publications

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“…Therefore, constructing composites of MoS 2 may be one of the most effective modification methods. Materials compounded with MoS 2 can be classified into the following categories: (i) Metal oxide semiconductors: n-type CeO 2 , 75 ZnO, 76 SnO 2 , 77 WO 3 , 78 In 2 O 3 , 79 TiO 2 , 80 and MoO 3 (ref. 81) and p-type CuO, 82 Co 3 O 4 , 83 NiO, 84 Cu 2 O, 85 PANI, 86 and PPy.…”

Section: Construction Of Compositesmentioning

confidence: 99%

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Recent advances in MoS₂-based nanomaterial sensors for room-temperature gas detection: a review

Tian

Wang

et al. 2023

Sens. Diagn.

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Section: Construction Of Compositesmentioning

confidence: 99%

“…(i) Metal oxide semiconductors: n-type CeO 2 , 75 ZnO, 76 SnO 2 , 77 WO 3 , 78 In 2 O 3 , 79 TiO 2 , 80 and MoO 3 (ref. 81) and p-type CuO, 82 Co 3 O 4 , 83 NiO, 84 Cu 2 O, 85 PANI, 86 and PPy.…”

Section: Strategies To Improve the Gas Sensing Performance Of Mos2mentioning

confidence: 99%

Recent advances in MoS₂-based nanomaterial sensors for room-temperature gas detection: a review

Tian

Wang

et al. 2023

Sens. Diagn.

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“…The adoptive material system has changed from monocomponent oxide to binary, ternary, and even multicomponent composites in search of superior or unexpected gas-sensing properties. The following methods are used for composite fabrication: mechanical mixing, , chemical recombination, − chemical doping, − and solid solution. − …”

Section: Introductionmentioning

confidence: 99%

“…Chemical recombination has been widely used in synthesizing gas-sensing materials. A two-step synthetic procedure is commonly used. − In chemical recombination, like mechanical mixing, the proportions of the two components making up a composite are comparable, − ,, and sometimes there is no primary or secondary component. A mass of heterojunctions (n–n, ,,, p–n, , and p–p) will emerge around the interfaces within obtained composites due to different Fermi energy levels of the individual components.…”

Section: Introductionmentioning

confidence: 99%

“…A two-step synthetic procedure is commonly used. − In chemical recombination, like mechanical mixing, the proportions of the two components making up a composite are comparable, − ,, and sometimes there is no primary or secondary component. A mass of heterojunctions (n–n, ,,, p–n, , and p–p) will emerge around the interfaces within obtained composites due to different Fermi energy levels of the individual components. The modulation of charge carriers by heterojunctions will result in much improved responses for synthesized composites compared with the components.…”

Section: Introductionmentioning

confidence: 99%

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In/Fe Cospinning Nanowires for Triethylamine Gas Sensing

Zhang

Wang

et al. 2022

ACS Appl. Nano Mater.

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Solid solution is a type of substance with rich physicochemical properties and significant internal adjustability. Thus, it has been widely used in various areas, including gas sensing. In this study, several In/Fe oxide solid solutions were successfully synthesized using the cospinning method and annealing process. Affirmatively, the solute In 3+ substituted the original host Fe 3+ in lattices of iron oxide, and vice versa. Thus, phases of α-(Fe 1−x In x ) 2 O 3 and C-(Fe 1−x In x ) 2 O 3 solid solutions appeared in sequence as the proportion of In 3+ increased. When In 3+ was introduced, composite nanowires (NWs) became porous, but when the amount of In 3+ was increased, the gas permeability worsened. When the amount of In 3+ became comparable to that of Fe 3+ in the precursor, abundant amorphous regions emerged in the product due to the mutual interference between the respective crystallization courses of In 3+ and Fe 3+ . Satisfactorily, the gassensing properties of as-synthesized samples maintained a close relationship with the composition and structure. For example, the product with the highest response and fastest response time toward the triethylamine detection had a 20.0 mol % ratio of In 3+ in the precursor. However, despite having a higher initial resistance, the sensor response was reduced by overproportioned amorphous phases caused by excessive In 3+ addition. Importantly, the response time of the optimal Fe 1.6 In 0.4 O 3 NWs was only 4 s, and recovery speeds of Fe 3+ -containing samples maintained a positive correlation with the gas permeability of products. Band stuctures of samples were obtained to give a reasonable explanation on the gas-sensitivity improvement. This study will promote the application of solid solutions to a gas-sensing area.

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Synergetic Effect of Heterojunction and Sulfur Vacancy on ZnIn₂S₄/CeO₂ to Enhance the Photocatalytic Performance of 5‐Hydroxymethylfurfural into 2,5‐Diformylfuran

Wang,

Liu,

et al. 2024

Adv Funct Materials

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The efficient separation of photocarriers and facile generation of superoxide radicals are crucial for enhancing the performance of photocatalysts in the selectively photo‐oxidizing 5‐hydroxymethylfurfural (HMF) into 2,5‐diformylfuran (DFF). Herein, a ZnIn2S4/CeO2 composite with S‐scheme heterojunction and sulfur vacancies (SV) is successfully developed through a one‐step hydrothermal method. The optimal catalyst (SV‐ZnIn2S4/CeO2) exhibits excellent catalytic activity with 100% conversion of HMF and 96.1% selectivity of DFF in 80 min under ambient conditions, the production rate of DFF is up to 952.6 µmol g−1 h−1. Intriguingly, the performance remains significant even when the concentration of HMF is increased from 8 to 100 mм. Experimental and theoretical investigations discover that the synergistic effect of S‐scheme heterojunction and sulfur vacancies contribute to the separation of photocarriers and the activation of oxygen, which facilitate the generation of superoxide radicals, thus boosting the catalytic oxidation reactions.

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Two-step hydrothermal fabrication of CeO2-loaded MoS2 nanoflowers for ethanol gas sensing application

Cited by 54 publications

References 62 publications

Recent advances in MoS₂-based nanomaterial sensors for room-temperature gas detection: a review

Recent advances in MoS₂-based nanomaterial sensors for room-temperature gas detection: a review

In/Fe Cospinning Nanowires for Triethylamine Gas Sensing

Synergetic Effect of Heterojunction and Sulfur Vacancy on ZnIn₂S₄/CeO₂ to Enhance the Photocatalytic Performance of 5‐Hydroxymethylfurfural into 2,5‐Diformylfuran

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Two-step hydrothermal fabrication of CeO2-loaded MoS2 nanoflowers for ethanol gas sensing application

Cited by 54 publications

References 62 publications

Recent advances in MoS2-based nanomaterial sensors for room-temperature gas detection: a review

Recent advances in MoS2-based nanomaterial sensors for room-temperature gas detection: a review

In/Fe Cospinning Nanowires for Triethylamine Gas Sensing

Synergetic Effect of Heterojunction and Sulfur Vacancy on ZnIn2S4/CeO2 to Enhance the Photocatalytic Performance of 5‐Hydroxymethylfurfural into 2,5‐Diformylfuran

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Product

Resources

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Recent advances in MoS₂-based nanomaterial sensors for room-temperature gas detection: a review

Recent advances in MoS₂-based nanomaterial sensors for room-temperature gas detection: a review

Synergetic Effect of Heterojunction and Sulfur Vacancy on ZnIn₂S₄/CeO₂ to Enhance the Photocatalytic Performance of 5‐Hydroxymethylfurfural into 2,5‐Diformylfuran