Fabrication of single crystalline WO3 nano-belts based photoelectric gas sensor for detection of high concentration ethanol gas at room temperature

Yu, Hualiang; Wang, Jun; Zheng, Biao; Zhang, Bingwen; Liu, Liqin; Zhou, Yuan; Zhang, Cheng; Xue, Xiaoxiao

doi:10.1016/j.sna.2020.111865

Cited by 36 publications

(9 citation statements)

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“…Narrower E g means a smaller energy barrier of electron transfer, leading to easier electron capture by O 2 in air and the formation of adsorbed oxygen (O ads ) that is crucial to TEA sensing, thereby resulting in better gas-sensing performance. 32…”

Section: Resultsmentioning

confidence: 99%

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Chen

Wang

et al. 2022

J. Mater. Chem. C

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Section: Resultsmentioning

confidence: 99%

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Chen

Wang

et al. 2022

J. Mater. Chem. C

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“…Therefore, detecting ethanol molecules at very low concentrations in an environment is of importance . In the field of detecting ethanol, resistive gas sensors constructed using metal oxides, such as TiO 2 , WO 3 , Fe 2 O 3 , and Zn 2 SnO 4 , are generally employed. In particular, TiO 2 not only has the characteristic of good electrical properties and low price but also has good sensing stability .…”

Section: Introductionmentioning

confidence: 99%

Nanoporous Co₃O₄–TiO₂ Heterojunction Nanosheets for Ethanol Sensing

Zhang

Liang

et al. 2022

ACS Appl. Nano Mater.

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Construction of suitable heterojunction oxide nanocomposites with affluent porosities and distinctive microstructures is a primary approach for acquiring high-performance sensing materials for specific gases. In this work, certain Co3O4–TiO2 porous heterojunction nanosheets derived from bimetal–organic frameworks (BMOFs) were constructed by calcining MIL-125 and ZIF-67 precursors with the goal of sensing ethanol. Sensing results showed that BMOF-derived Co3O4–TiO2 porous nanosheets exhibited much better ethanol-sensing performances than metal–organic framework (MOF)-derived TiO2 nanotablets. The molar ratio of Co3O4 to TiO2 was modulated to optimize the sensing performances of the Co3O4–TiO2 nanosheets. Under the conditions of 250 °C and 50 ppm ethanol, the heterojunction nanosheets with an optimal molar ratio of 12 mol % displayed the highest response value of 41.72, which was 20.76 times higher than the response of pure TiO2 nanotablets (2.01). Moreover, the selectivity coefficient (85.29%) of 12 mol % Co3O4–TiO2 nanosheets was about 3.06 times as large as that of pure TiO2 nanotablets (27.91%). The enhanced sensing performances toward ethanol were mainly due to the formed p–n heterojunctions and the porous nanosheet nanostructures with a high specific surface area.

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“…Yan et al [125] Therefore, a small change in carrier concentration resulted in a larger gas response. WO 3 is favored in ethanol gas sensors because of its special physicochemical and electrical properties [133,134]. Juang and Wang's team [120] found that the composite of porous NiO spheres and WO 3 nanoplates had a response of 155% to ethanol, which was 1.4 times that of pure WO 3 nanoplates.…”

Section: Metal Oxidesmentioning

confidence: 99%

NiO-Based Gas Sensors for Ethanol Detection: Recent Progress

Zeng

2022

Journal of Sensors

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In this review, we summarized the state-of-the-art progress on the ethanol performance of NiO by means of morphology, doping, loading noble metal particles, and forming heterojunctions. We first introduced the effect of modulating NiO morphology on ethanol performance that has been reported in recent years. The morphology with large specific surface area and high porosity was considered to be the one that can bring high gas response. Then, we discussed the enhanced effect of the doping of metal cations and noble metal particle loading on the ethanol-sensitive properties of NiO. Doping ions increased the ground-state resistance and increased the oxygen defect concentration of NiO. The effects of noble metal particles on the performance of NiO included chemical sensitization and electronic sensitization. Finally, the related contents of NiO forming complexes with metal oxides and bimetallic oxides were discussed. In this section, the specific improvement mechanism was discussed first, and then, the related work of researchers in recent years was summarized. At the same time, we presented a reasonable outlook for NiO-based ethanol sensors, imagining future directions.

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Fabrication of single crystalline WO3 nano-belts based photoelectric gas sensor for detection of high concentration ethanol gas at room temperature

Cited by 36 publications

References 40 publications

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Nanoporous Co₃O₄–TiO₂ Heterojunction Nanosheets for Ethanol Sensing

NiO-Based Gas Sensors for Ethanol Detection: Recent Progress

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Fabrication of single crystalline WO3 nano-belts based photoelectric gas sensor for detection of high concentration ethanol gas at room temperature

Cited by 36 publications

References 40 publications

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Insights into the effect of Au particle size on triethylamine sensing properties based on a Au–ZnO nanoflower sensor

Nanoporous Co3O4–TiO2 Heterojunction Nanosheets for Ethanol Sensing

NiO-Based Gas Sensors for Ethanol Detection: Recent Progress

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Product

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Nanoporous Co₃O₄–TiO₂ Heterojunction Nanosheets for Ethanol Sensing