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Hierarchical Heterojunctions of Metal Sulfide WS 2 Nanosheets/Metal Oxide In 2 O 3 Nanofibers for an Efficient Detection of Formaldehyde.

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Title: Hierarchical Heterojunctions of Metal Sulfide WS 2 Nanosheets/Metal Oxide In 2 O 3 Nanofibers for an Efficient Detection of Formaldehyde.
Authors: Zhu, Lei1,2 (AUTHOR) leizhu@xjtu.edu.cn, Zhang, Jiaxin1 (AUTHOR), Wang, Jianan1 (AUTHOR) wangjn116@xjtu.edu.cn, Liu, Jianwei1,3 (AUTHOR), Yan, Wei1 (AUTHOR) wangjn116@xjtu.edu.cn
Source: Nanomaterials (2079-4991). Nov2024, Vol. 14 Issue 21, p1702. 12p.
Subjects: P-N heterojunctions, Gas detectors, Gas absorption & adsorption, Charge transfer, Nanostructured materials
Abstract: The construction of transition metal dichalcogenides (TMDs) heterojunctions for high-performance gas sensors has garnered significant attention due to their capacity to operate at low temperatures. Herein, we realize two-dimensional (2D) WS2 nanosheets in situ grown on one-dimensional (1D) In2O3 nanofibers to form heterostructures for formaldehyde (HCHO) gas sensors. Capitalizing on the p-n heterojunctions formed between WS2 and In2O3, coupled with the high surface-to-volume ratio characteristic of 1D nanostructures, the WS2/In2O3 NFs sensor demonstrated an elevated gas response of 12.6 toward 100 ppm HCHO at 140 °C, surpassing the performance of the pristine In2O3 sensor by a factor of two. Meanwhile, the sensor presents remarkable repeatability, rapid response/recovery speed, and good long-term stability. The superior sensing capabilities of WS2/In2O3 NFs heterojunction are attributed to the combined impact of the increased charge transfer and the presence of more sites for gas adsorption. The research endows a potent approach for fabricating TMD heterojunctions to significantly enhance the gas sensing properties of gas sensors at relatively low temperatures. [ABSTRACT FROM AUTHOR]
Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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PubTypeId: academicJournal
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  Label: Title
  Group: Ti
  Data: Hierarchical Heterojunctions of Metal Sulfide WS 2 Nanosheets/Metal Oxide In 2 O 3 Nanofibers for an Efficient Detection of Formaldehyde.
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  Data: <searchLink fieldCode="JN" term="%22Nanomaterials+%282079-4991%29%22">Nanomaterials (2079-4991)</searchLink>. Nov2024, Vol. 14 Issue 21, p1702. 12p.
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  Data: <searchLink fieldCode="DE" term="%22P-N+heterojunctions%22">P-N heterojunctions</searchLink><br /><searchLink fieldCode="DE" term="%22Gas+detectors%22">Gas detectors</searchLink><br /><searchLink fieldCode="DE" term="%22Gas+absorption+%26+adsorption%22">Gas absorption & adsorption</searchLink><br /><searchLink fieldCode="DE" term="%22Charge+transfer%22">Charge transfer</searchLink><br /><searchLink fieldCode="DE" term="%22Nanostructured+materials%22">Nanostructured materials</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The construction of transition metal dichalcogenides (TMDs) heterojunctions for high-performance gas sensors has garnered significant attention due to their capacity to operate at low temperatures. Herein, we realize two-dimensional (2D) WS2 nanosheets in situ grown on one-dimensional (1D) In2O3 nanofibers to form heterostructures for formaldehyde (HCHO) gas sensors. Capitalizing on the p-n heterojunctions formed between WS2 and In2O3, coupled with the high surface-to-volume ratio characteristic of 1D nanostructures, the WS2/In2O3 NFs sensor demonstrated an elevated gas response of 12.6 toward 100 ppm HCHO at 140 °C, surpassing the performance of the pristine In2O3 sensor by a factor of two. Meanwhile, the sensor presents remarkable repeatability, rapid response/recovery speed, and good long-term stability. The superior sensing capabilities of WS2/In2O3 NFs heterojunction are attributed to the combined impact of the increased charge transfer and the presence of more sites for gas adsorption. The research endows a potent approach for fabricating TMD heterojunctions to significantly enhance the gas sensing properties of gas sensors at relatively low temperatures. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nanomaterials (2079-4991) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.3390/nano14211702
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      – Code: eng
        Text: English
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        PageCount: 12
        StartPage: 1702
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      – SubjectFull: P-N heterojunctions
        Type: general
      – SubjectFull: Gas detectors
        Type: general
      – SubjectFull: Gas absorption & adsorption
        Type: general
      – SubjectFull: Charge transfer
        Type: general
      – SubjectFull: Nanostructured materials
        Type: general
    Titles:
      – TitleFull: Hierarchical Heterojunctions of Metal Sulfide WS 2 Nanosheets/Metal Oxide In 2 O 3 Nanofibers for an Efficient Detection of Formaldehyde.
        Type: main
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          Name:
            NameFull: Zhu, Lei
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            NameFull: Zhang, Jiaxin
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            NameFull: Wang, Jianan
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            NameFull: Liu, Jianwei
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            NameFull: Yan, Wei
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          Dates:
            – D: 01
              M: 11
              Text: Nov2024
              Type: published
              Y: 2024
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              Value: 14
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            – TitleFull: Nanomaterials (2079-4991)
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