Etched Tungsten Oxide Modified with Au for Quick Xylene Detection
Due to its widespread distribution in industrial, commercial, and residential settings, xylene detection is crucial. In this study, carbon sphere templates and NaHCO<sub>3</sub> etching were used to synergistically prepare WO<sub>3</sub> with uniform macropores, which was the...
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MDPI AG
2025-05-01
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| Online Access: | https://www.mdpi.com/2072-666X/16/6/646 |
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| author | Yinglin Wang Zhaohui Lei Xu Li Yantong Meng Wanting Cui Yiyang Xu Xidong Hao Shanfu Sun Pengfei Cheng |
| author_facet | Yinglin Wang Zhaohui Lei Xu Li Yantong Meng Wanting Cui Yiyang Xu Xidong Hao Shanfu Sun Pengfei Cheng |
| author_sort | Yinglin Wang |
| collection | DOAJ |
| description | Due to its widespread distribution in industrial, commercial, and residential settings, xylene detection is crucial. In this study, carbon sphere templates and NaHCO<sub>3</sub> etching were used to synergistically prepare WO<sub>3</sub> with uniform macropores, which was then decorated with Au elements. The findings demonstrated that the Au-decorated WO<sub>3</sub>-etched sample (WO<sub>3</sub>-1%E+Au) had the best sensing performance for 100 ppm xylene (response value: 21.3, optimal operating temperature: 360 °C) and short response/recovery time (1 s/11 s). The etching of NaHCO<sub>3</sub> and the synergistic carbon sphere templates were responsible for the sensing performance, as they enhanced the sample surface’s specific surface area and roughness while also supplying additional active sites. Furthermore, the sensor’s sensitivity and selectivity to xylene were enhanced by the coupling effect and dehydrogenation catalysis of the noble metal Au. The results of this work advance our knowledge of gas-sensing mechanisms and offer guidance for the creation of extremely sensitive and selective xylene gas sensors. |
| format | Article |
| id | doaj-art-179e5f69c0bb400fa7a9b608b666f3fd |
| institution | DOAJ |
| issn | 2072-666X |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj-art-179e5f69c0bb400fa7a9b608b666f3fd2025-08-20T03:16:23ZengMDPI AGMicromachines2072-666X2025-05-0116664610.3390/mi16060646Etched Tungsten Oxide Modified with Au for Quick Xylene DetectionYinglin Wang0Zhaohui Lei1Xu Li2Yantong Meng3Wanting Cui4Yiyang Xu5Xidong Hao6Shanfu Sun7Pengfei Cheng8School of Aerospace Science and Technology, Xidian University, Xi’an 710126, ChinaSchool of Aerospace Science and Technology, Xidian University, Xi’an 710126, ChinaSchool of Aerospace Science and Technology, Xidian University, Xi’an 710126, ChinaSchool of Aerospace Science and Technology, Xidian University, Xi’an 710126, ChinaSchool of Aerospace Science and Technology, Xidian University, Xi’an 710126, ChinaSchool of Aerospace Science and Technology, Xidian University, Xi’an 710126, ChinaSchool of Aerospace Science and Technology, Xidian University, Xi’an 710126, ChinaSchool of Aerospace Science and Technology, Xidian University, Xi’an 710126, ChinaSchool of Aerospace Science and Technology, Xidian University, Xi’an 710126, ChinaDue to its widespread distribution in industrial, commercial, and residential settings, xylene detection is crucial. In this study, carbon sphere templates and NaHCO<sub>3</sub> etching were used to synergistically prepare WO<sub>3</sub> with uniform macropores, which was then decorated with Au elements. The findings demonstrated that the Au-decorated WO<sub>3</sub>-etched sample (WO<sub>3</sub>-1%E+Au) had the best sensing performance for 100 ppm xylene (response value: 21.3, optimal operating temperature: 360 °C) and short response/recovery time (1 s/11 s). The etching of NaHCO<sub>3</sub> and the synergistic carbon sphere templates were responsible for the sensing performance, as they enhanced the sample surface’s specific surface area and roughness while also supplying additional active sites. Furthermore, the sensor’s sensitivity and selectivity to xylene were enhanced by the coupling effect and dehydrogenation catalysis of the noble metal Au. The results of this work advance our knowledge of gas-sensing mechanisms and offer guidance for the creation of extremely sensitive and selective xylene gas sensors.https://www.mdpi.com/2072-666X/16/6/646WO<sub>3</sub>gas sensorxylene sensorAu decorationetching techniques |
| spellingShingle | Yinglin Wang Zhaohui Lei Xu Li Yantong Meng Wanting Cui Yiyang Xu Xidong Hao Shanfu Sun Pengfei Cheng Etched Tungsten Oxide Modified with Au for Quick Xylene Detection Micromachines WO<sub>3</sub> gas sensor xylene sensor Au decoration etching techniques |
| title | Etched Tungsten Oxide Modified with Au for Quick Xylene Detection |
| title_full | Etched Tungsten Oxide Modified with Au for Quick Xylene Detection |
| title_fullStr | Etched Tungsten Oxide Modified with Au for Quick Xylene Detection |
| title_full_unstemmed | Etched Tungsten Oxide Modified with Au for Quick Xylene Detection |
| title_short | Etched Tungsten Oxide Modified with Au for Quick Xylene Detection |
| title_sort | etched tungsten oxide modified with au for quick xylene detection |
| topic | WO<sub>3</sub> gas sensor xylene sensor Au decoration etching techniques |
| url | https://www.mdpi.com/2072-666X/16/6/646 |
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