WO<sub>3</sub>-LaFeO<sub>3</sub> Nanocomposites for Highly Sensitive Detection of Acetone Vapor at Low Operating Temperatures
The development of a rapid, highly sensitive, and dependable acetone sensor holds significant importance for human health and safety. To enhance the acetone sensing performance of LaFeO<sub>3</sub> nanoparticles for practical applications, commercial n-type WO<sub>3</sub> nan...
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MDPI AG
2023-08-01
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| Series: | Chemosensors |
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| Online Access: | https://www.mdpi.com/2227-9040/11/8/439 |
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| author | Ensi Cao Yixuan Zhang Li Sun Bing Sun Wentao Hao Yongjia Zhang Zhongquan Nie |
| author_facet | Ensi Cao Yixuan Zhang Li Sun Bing Sun Wentao Hao Yongjia Zhang Zhongquan Nie |
| author_sort | Ensi Cao |
| collection | DOAJ |
| description | The development of a rapid, highly sensitive, and dependable acetone sensor holds significant importance for human health and safety. To enhance the acetone sensing performance of LaFeO<sub>3</sub> nanoparticles for practical applications, commercial n-type WO<sub>3</sub> nanoparticles were incorporated as additives. They were directly mixed with LaFeO<sub>3</sub> nanoparticles produced through a sol-gel method, creating a series of WO<sub>3</sub>-LFO nanocomposites with varying mass ratios. These nanocomposites were characterized using XRD, SEM, BET, and XPS techniques. Compared to pure LFO nanoparticles, the prepared nanocomposites exhibited larger specific surface areas with enhanced surface reactivity. The introduction of p-n heterojunctions through the mixing process improved the regulation of acetone molecules on internal carrier conduction within nanocomposites. As a result, the nanocomposites demonstrated superior acetone sensing performance in terms of optimal operating temperature, vapor response value, selectivity, and response/recovery speed. Notably, the nanocomposites with a 5wt% addition of WO<sub>3</sub> showed the lowest optimal operating temperature (132 °C), the fastest response/recovery speed (28/9 s), and the highest selectivity against ethanol, methanol, and EG. On the other hand, the nanocomposites with a 10wt% addition of WO<sub>3</sub> displayed the maximum vapor response value (55.1 to 100 ppm) at an optimal operating temperature of 138 °C, along with relatively good repeatability, stability, and selectivity. |
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| institution | Directory Open Access Journal |
| issn | 2227-9040 |
| language | English |
| last_indexed | 2024-03-11T00:02:17Z |
| publishDate | 2023-08-01 |
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| spelling | doaj.art-6f3d4675de81454da1ae9b60f2d3bc0b2023-11-19T00:38:29ZengMDPI AGChemosensors2227-90402023-08-0111843910.3390/chemosensors11080439WO<sub>3</sub>-LaFeO<sub>3</sub> Nanocomposites for Highly Sensitive Detection of Acetone Vapor at Low Operating TemperaturesEnsi Cao0Yixuan Zhang1Li Sun2Bing Sun3Wentao Hao4Yongjia Zhang5Zhongquan Nie6School of Physics and Electronic Information, Weifang University, Weifang 261061, ChinaCollege of Physics, Taiyuan University of Technology, Taiyuan 030024, ChinaSchool of Physics and Electronic Information, Weifang University, Weifang 261061, ChinaSchool of Physics and Electronic Information, Weifang University, Weifang 261061, ChinaSchool of Physics and Electronic Information, Weifang University, Weifang 261061, ChinaCollege of Physics, Taiyuan University of Technology, Taiyuan 030024, ChinaKey Lab of Advanced Transducers and Intelligent Control System, Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, ChinaThe development of a rapid, highly sensitive, and dependable acetone sensor holds significant importance for human health and safety. To enhance the acetone sensing performance of LaFeO<sub>3</sub> nanoparticles for practical applications, commercial n-type WO<sub>3</sub> nanoparticles were incorporated as additives. They were directly mixed with LaFeO<sub>3</sub> nanoparticles produced through a sol-gel method, creating a series of WO<sub>3</sub>-LFO nanocomposites with varying mass ratios. These nanocomposites were characterized using XRD, SEM, BET, and XPS techniques. Compared to pure LFO nanoparticles, the prepared nanocomposites exhibited larger specific surface areas with enhanced surface reactivity. The introduction of p-n heterojunctions through the mixing process improved the regulation of acetone molecules on internal carrier conduction within nanocomposites. As a result, the nanocomposites demonstrated superior acetone sensing performance in terms of optimal operating temperature, vapor response value, selectivity, and response/recovery speed. Notably, the nanocomposites with a 5wt% addition of WO<sub>3</sub> showed the lowest optimal operating temperature (132 °C), the fastest response/recovery speed (28/9 s), and the highest selectivity against ethanol, methanol, and EG. On the other hand, the nanocomposites with a 10wt% addition of WO<sub>3</sub> displayed the maximum vapor response value (55.1 to 100 ppm) at an optimal operating temperature of 138 °C, along with relatively good repeatability, stability, and selectivity.https://www.mdpi.com/2227-9040/11/8/439LaFeO<sub>3</sub>WO<sub>3</sub>nanocompositesacetoneXPS |
| spellingShingle | Ensi Cao Yixuan Zhang Li Sun Bing Sun Wentao Hao Yongjia Zhang Zhongquan Nie WO<sub>3</sub>-LaFeO<sub>3</sub> Nanocomposites for Highly Sensitive Detection of Acetone Vapor at Low Operating Temperatures Chemosensors LaFeO<sub>3</sub> WO<sub>3</sub> nanocomposites acetone XPS |
| title | WO<sub>3</sub>-LaFeO<sub>3</sub> Nanocomposites for Highly Sensitive Detection of Acetone Vapor at Low Operating Temperatures |
| title_full | WO<sub>3</sub>-LaFeO<sub>3</sub> Nanocomposites for Highly Sensitive Detection of Acetone Vapor at Low Operating Temperatures |
| title_fullStr | WO<sub>3</sub>-LaFeO<sub>3</sub> Nanocomposites for Highly Sensitive Detection of Acetone Vapor at Low Operating Temperatures |
| title_full_unstemmed | WO<sub>3</sub>-LaFeO<sub>3</sub> Nanocomposites for Highly Sensitive Detection of Acetone Vapor at Low Operating Temperatures |
| title_short | WO<sub>3</sub>-LaFeO<sub>3</sub> Nanocomposites for Highly Sensitive Detection of Acetone Vapor at Low Operating Temperatures |
| title_sort | wo sub 3 sub lafeo sub 3 sub nanocomposites for highly sensitive detection of acetone vapor at low operating temperatures |
| topic | LaFeO<sub>3</sub> WO<sub>3</sub> nanocomposites acetone XPS |
| url | https://www.mdpi.com/2227-9040/11/8/439 |
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