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Highly sensitive room-temperature methanol detection enabled by UV-activated Pd-doped W18O49 gas sensor.

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Title: Highly sensitive room-temperature methanol detection enabled by UV-activated Pd-doped W18O49 gas sensor.
Authors: Zhang, Haoshuang1 (AUTHOR), Wang, Tianshuang1,2 (AUTHOR) wangtianshuang@jlu.edu.cn, Zhao, Liupeng1 (AUTHOR), Kou, Xueying1,3 (AUTHOR) kouxueying@cust.edu.cn, Sun, Peng1,2 (AUTHOR) pengsun@jlu.edu.cn, Lu, Geyu1,2 (AUTHOR)
Source: Sensors & Actuators B: Chemical. Sep2026, Vol. 462, pN.PAG-N.PAG. 1p.
Subjects: Gas detectors, Volatile organic compounds, Air quality monitoring
Abstract: The detection of flammable and explosive methanol (CH 3 OH) at room temperature remains challenging for semiconductor gas sensors, severely restricting their practical applications due to low sensitivity, high detection limit, and poor selectivity. Herein, we report a UV-activated gas sensor based on Pd-doped W 18 O 49 that exhibits high response to CH 3 OH along with rapid response/recovery times (169 s/346 s), and low detection limit (100 ppb), representing one of the best performances reported to date for room-temperature CH 3 OH sensing. The enhanced room-temperature sensing performance under UV illumination is attributed to the effective electron-transport pathway within nanowires, doping-induced energy band structure optimization, high adsorption capacity on defect-rich surface, and facilitated CH 3 OH dehydrogenation, as verified by density functional theory (DFT) calculations and comprehensive optical and electrical characterizations. To demonstrate practical application, a portable sensing and monitoring system was developed, enabling successful real-time indoor air quality assessment with an alarm function. This work provides a viable and efficient solution for room-temperature volatile organic compounds monitoring. [Display omitted] • Rambutan-like Pd-doped W 18 O 49 sensors enable UV-activated CH 3 OH detection at 25℃. • 1.0 at% Pd/W 18 O 49 shows high response to 100 ppb CH 3 OH with rapid response/recovery times. • Optimized electron transport, band structure and surface adsorption enhanced CH 3 OH sensing. • A portable CH 3 OH monitor prototype was developed for indoor air quality assessment. [ABSTRACT FROM AUTHOR]
Copyright of Sensors & Actuators B: Chemical is the property of Elsevier B.V. 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.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 193591042
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PubTypeId: academicJournal
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  Label: Title
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  Data: Highly sensitive room-temperature methanol detection enabled by UV-activated Pd-doped W18O49 gas sensor.
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  Data: <searchLink fieldCode="AR" term="%22Zhang%2C+Haoshuang%22">Zhang, Haoshuang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Tianshuang%22">Wang, Tianshuang</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> wangtianshuang@jlu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Zhao%2C+Liupeng%22">Zhao, Liupeng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Kou%2C+Xueying%22">Kou, Xueying</searchLink><relatesTo>1,3</relatesTo> (AUTHOR)<i> kouxueying@cust.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Sun%2C+Peng%22">Sun, Peng</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)<i> pengsun@jlu.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Lu%2C+Geyu%22">Lu, Geyu</searchLink><relatesTo>1,2</relatesTo> (AUTHOR)
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  Data: <searchLink fieldCode="JN" term="%22Sensors+%26+Actuators+B%3A+Chemical%22">Sensors & Actuators B: Chemical</searchLink>. Sep2026, Vol. 462, pN.PAG-N.PAG. 1p.
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  Data: <searchLink fieldCode="DE" term="%22Gas+detectors%22">Gas detectors</searchLink><br /><searchLink fieldCode="DE" term="%22Volatile+organic+compounds%22">Volatile organic compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Air+quality+monitoring%22">Air quality monitoring</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: The detection of flammable and explosive methanol (CH 3 OH) at room temperature remains challenging for semiconductor gas sensors, severely restricting their practical applications due to low sensitivity, high detection limit, and poor selectivity. Herein, we report a UV-activated gas sensor based on Pd-doped W 18 O 49 that exhibits high response to CH 3 OH along with rapid response/recovery times (169 s/346 s), and low detection limit (100 ppb), representing one of the best performances reported to date for room-temperature CH 3 OH sensing. The enhanced room-temperature sensing performance under UV illumination is attributed to the effective electron-transport pathway within nanowires, doping-induced energy band structure optimization, high adsorption capacity on defect-rich surface, and facilitated CH 3 OH dehydrogenation, as verified by density functional theory (DFT) calculations and comprehensive optical and electrical characterizations. To demonstrate practical application, a portable sensing and monitoring system was developed, enabling successful real-time indoor air quality assessment with an alarm function. This work provides a viable and efficient solution for room-temperature volatile organic compounds monitoring. [Display omitted] • Rambutan-like Pd-doped W 18 O 49 sensors enable UV-activated CH 3 OH detection at 25℃. • 1.0 at% Pd/W 18 O 49 shows high response to 100 ppb CH 3 OH with rapid response/recovery times. • Optimized electron transport, band structure and surface adsorption enhanced CH 3 OH sensing. • A portable CH 3 OH monitor prototype was developed for indoor air quality assessment. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Sensors & Actuators B: Chemical is the property of Elsevier B.V. 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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      – Type: doi
        Value: 10.1016/j.snb.2026.140037
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        Text: English
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        Type: general
      – SubjectFull: Volatile organic compounds
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      – SubjectFull: Air quality monitoring
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      – TitleFull: Highly sensitive room-temperature methanol detection enabled by UV-activated Pd-doped W18O49 gas sensor.
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            NameFull: Zhang, Haoshuang
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            NameFull: Wang, Tianshuang
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            NameFull: Zhao, Liupeng
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            NameFull: Kou, Xueying
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            NameFull: Sun, Peng
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            – D: 01
              M: 09
              Text: Sep2026
              Type: published
              Y: 2026
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              Value: 462
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            – TitleFull: Sensors & Actuators B: Chemical
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