Ag-Modified In2O3 Nanoparticles for Highly Sensitive and Selective Ethanol Alarming
Pure In2O3 nanoparticles are prepared by a facile precipitation method and are further modified by Ag. The synthesized samples are characterized by scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, Raman and UV-Vis spectra. The r...
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| Format: | Article |
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MDPI AG
2017-09-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/17/10/2220 |
| _version_ | 1798041386062184448 |
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| author | Jinxiao Wang Zheng Xie Yuan Si Xinyi Liu Xinyuan Zhou Jianfeng Yang Peng Hu Ning Han Jun Yang Yunfa Chen |
| author_facet | Jinxiao Wang Zheng Xie Yuan Si Xinyi Liu Xinyuan Zhou Jianfeng Yang Peng Hu Ning Han Jun Yang Yunfa Chen |
| author_sort | Jinxiao Wang |
| collection | DOAJ |
| description | Pure In2O3 nanoparticles are prepared by a facile precipitation method and are further modified by Ag. The synthesized samples are characterized by scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, Raman and UV-Vis spectra. The results show the successful heterojunction formation between Ag and In2O3. Gas sensing property measurements show that the 5 mol % Ag-modified In2O3 sensor has the response of 67 to 50 ppm ethanol, and fast response and recovery time of 22.3 and 11.7 s. The response is over one magnitude higher than that of pure In2O3, which can be attributed to the enhanced catalytic activity of Ag-modified In2O3 as compared with the pure one. The mechanism of the gas sensor can be explained by the spillover effect of Ag, which enhances the oxygen adsorption onto the surface of In2O3 and thus give rise to the higher activity and larger surface barrier height. |
| first_indexed | 2024-04-11T22:20:49Z |
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| id | doaj.art-369e5bce25344ce2b6667049c743a7d0 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-04-11T22:20:49Z |
| publishDate | 2017-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-369e5bce25344ce2b6667049c743a7d02022-12-22T04:00:09ZengMDPI AGSensors1424-82202017-09-011710222010.3390/s17102220s17102220Ag-Modified In2O3 Nanoparticles for Highly Sensitive and Selective Ethanol AlarmingJinxiao Wang0Zheng Xie1Yuan Si2Xinyi Liu3Xinyuan Zhou4Jianfeng Yang5Peng Hu6Ning Han7Jun Yang8Yunfa Chen9State Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaState Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaBeijing ChenJingLun High School, Beijing 100101, ChinaBeijing ChenJingLun High School, Beijing 100101, ChinaState Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaState Key Laboratory for Mechanical Behavior of Materials, Xi’an Jiaotong University, Xi’an 710049, ChinaState Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaState Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaSchool of Metallurgical Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, ChinaState Key Laboratory of Multiphase Complex Systems, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, ChinaPure In2O3 nanoparticles are prepared by a facile precipitation method and are further modified by Ag. The synthesized samples are characterized by scanning electron microscopy, transmission electron microscopy, energy dispersive X-ray spectroscopy, X-ray diffraction, Raman and UV-Vis spectra. The results show the successful heterojunction formation between Ag and In2O3. Gas sensing property measurements show that the 5 mol % Ag-modified In2O3 sensor has the response of 67 to 50 ppm ethanol, and fast response and recovery time of 22.3 and 11.7 s. The response is over one magnitude higher than that of pure In2O3, which can be attributed to the enhanced catalytic activity of Ag-modified In2O3 as compared with the pure one. The mechanism of the gas sensor can be explained by the spillover effect of Ag, which enhances the oxygen adsorption onto the surface of In2O3 and thus give rise to the higher activity and larger surface barrier height.https://www.mdpi.com/1424-8220/17/10/2220In2O3 nanoparticlesAg modificationheterojunctionhigh responseethanol sensing |
| spellingShingle | Jinxiao Wang Zheng Xie Yuan Si Xinyi Liu Xinyuan Zhou Jianfeng Yang Peng Hu Ning Han Jun Yang Yunfa Chen Ag-Modified In2O3 Nanoparticles for Highly Sensitive and Selective Ethanol Alarming Sensors In2O3 nanoparticles Ag modification heterojunction high response ethanol sensing |
| title | Ag-Modified In2O3 Nanoparticles for Highly Sensitive and Selective Ethanol Alarming |
| title_full | Ag-Modified In2O3 Nanoparticles for Highly Sensitive and Selective Ethanol Alarming |
| title_fullStr | Ag-Modified In2O3 Nanoparticles for Highly Sensitive and Selective Ethanol Alarming |
| title_full_unstemmed | Ag-Modified In2O3 Nanoparticles for Highly Sensitive and Selective Ethanol Alarming |
| title_short | Ag-Modified In2O3 Nanoparticles for Highly Sensitive and Selective Ethanol Alarming |
| title_sort | ag modified in2o3 nanoparticles for highly sensitive and selective ethanol alarming |
| topic | In2O3 nanoparticles Ag modification heterojunction high response ethanol sensing |
| url | https://www.mdpi.com/1424-8220/17/10/2220 |
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