Citation: Deng Lifeng, Bao Liping, Xu Jingcheng, Wang Ding, Wang Xianying. Highly sensitive acetone gas sensor based on ultra-low content bimetallic PtCu modified WO₃·H₂O hollow sphere[J]. Chinese Chemical Letters, ;2020, 31(8): 2041-2044. doi: 10.1016/j.cclet.2020.04.033 shu

Highly sensitive acetone gas sensor based on ultra-low content bimetallic PtCu modified WO₃·H₂O hollow sphere

College of Materials Science and Engineering, University of Shanghai for Science & Technology, Shanghai 200093, China

wangding@usst.edu.cn

Received Date: 6 February 2020
Revised Date: 30 March 2020
Accepted Date: 19 April 2020
Available Online: 22 April 2020

Figures(4)

Acetone is an important industrial raw material as well as biomarker in medical diagnosis. The detection of acetone has great significance for safety and health. However, high selectivity and low concentration (ppb level) detection remain challenges for semiconductor gas sensor. Herein, we present a novel sensitive material with bimetallic PtCu nanocrystal modified on WO₃·H₂O hollow spheres (HS), which shows high sensitivity, excellent selectivity, fast response/recovery speed and low limit of detection (LOD) to acetone detection. Noteworthy, the response (R_a/R_g) of WO₃·H₂O HS sensor increased by 9.5 times after modification with 0.02% bimetallic PtCu nanocrystals. The response of PtCu/WO₃·H₂O HS to 50 ppm acetone is as high as 204.9 with short response/recovery times (3.4 s/7.5 s). Finally, the gassensitivity mechanism was discussed based on gas sensitivity test results. This research will offer a new route for high efficient acetone detection.
- Bimetallic nanocrystal,
- WO₃·H₂O hollow spheres,
- Two-dimensional materials,
- Acetone gas sensors,
- Nanocomposites
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

Highly sensitive acetone gas sensor based on ultra-low content bimetallic PtCu modified WO3·H2O hollow sphere

References

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通讯作者: 陈斌, bchen63@163.com

Highly sensitive acetone gas sensor based on ultra-low content bimetallic PtCu modified WO₃·H₂O hollow sphere