Nanowires-assembled WO3 nanomesh for fast detection of ppb-level NO2 at low temperature
Abstract Hierarchical WO3 nanomesh, assembled from single-crystalline WO3 nanowires, is prepared via a hydrothermal method using thiourea (Tu) as the morphology-controlling agent. Formation of the hierarchical architecture comprising of WO3 nanowires takes place via Ostwald ripening mechanism with t...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Tsinghua University Press
2020-02-01
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| Series: | Journal of Advanced Ceramics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/s40145-019-0343-3 |
| _version_ | 1797707629433192448 |
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| author | Di Liu Xiaowei Ren Yesheng Li Zilong Tang Zhongtai Zhang |
| author_facet | Di Liu Xiaowei Ren Yesheng Li Zilong Tang Zhongtai Zhang |
| author_sort | Di Liu |
| collection | DOAJ |
| description | Abstract Hierarchical WO3 nanomesh, assembled from single-crystalline WO3 nanowires, is prepared via a hydrothermal method using thiourea (Tu) as the morphology-controlling agent. Formation of the hierarchical architecture comprising of WO3 nanowires takes place via Ostwald ripening mechanism with the growth orientation. The sensor based on WO3 nanomesh has good electrical conductivity and is therefore suitable as NO2 sensing material. The WO3 nanomesh sensor exhibited high response, short response and recovery time, and excellent selectivity towards ppb-level NO2 at low temperature of 160 ℃. The superior gas performance of the sensor was attributed to the high-purity hexagonal WO3 with high specific surface area, which gives rise to enhanced surface adsorption sites for gas adsorption. The electron depletion theory was used for explaining the NO2-sensing mechanism by the gas adsorption/desorption and charge transfer happened on the surface of WO3 nanomesh. |
| first_indexed | 2024-03-12T06:10:13Z |
| format | Article |
| id | doaj.art-f2909352fbf241a885903be4861a07ad |
| institution | Directory Open Access Journal |
| issn | 2226-4108 2227-8508 |
| language | English |
| last_indexed | 2024-03-12T06:10:13Z |
| publishDate | 2020-02-01 |
| publisher | Tsinghua University Press |
| record_format | Article |
| series | Journal of Advanced Ceramics |
| spelling | doaj.art-f2909352fbf241a885903be4861a07ad2023-09-03T03:12:39ZengTsinghua University PressJournal of Advanced Ceramics2226-41082227-85082020-02-0191172610.1007/s40145-019-0343-3Nanowires-assembled WO3 nanomesh for fast detection of ppb-level NO2 at low temperatureDi Liu0Xiaowei Ren1Yesheng Li2Zilong Tang3Zhongtai Zhang4State Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua UniversityState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua UniversityState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua UniversityState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua UniversityState Key Laboratory of New Ceramics and Fine Processing, School of Materials Science and Engineering, Tsinghua UniversityAbstract Hierarchical WO3 nanomesh, assembled from single-crystalline WO3 nanowires, is prepared via a hydrothermal method using thiourea (Tu) as the morphology-controlling agent. Formation of the hierarchical architecture comprising of WO3 nanowires takes place via Ostwald ripening mechanism with the growth orientation. The sensor based on WO3 nanomesh has good electrical conductivity and is therefore suitable as NO2 sensing material. The WO3 nanomesh sensor exhibited high response, short response and recovery time, and excellent selectivity towards ppb-level NO2 at low temperature of 160 ℃. The superior gas performance of the sensor was attributed to the high-purity hexagonal WO3 with high specific surface area, which gives rise to enhanced surface adsorption sites for gas adsorption. The electron depletion theory was used for explaining the NO2-sensing mechanism by the gas adsorption/desorption and charge transfer happened on the surface of WO3 nanomesh.https://doi.org/10.1007/s40145-019-0343-3WO3 nanomeshcontrolling agentNO2 sensingcharge transfer |
| spellingShingle | Di Liu Xiaowei Ren Yesheng Li Zilong Tang Zhongtai Zhang Nanowires-assembled WO3 nanomesh for fast detection of ppb-level NO2 at low temperature Journal of Advanced Ceramics WO3 nanomesh controlling agent NO2 sensing charge transfer |
| title | Nanowires-assembled WO3 nanomesh for fast detection of ppb-level NO2 at low temperature |
| title_full | Nanowires-assembled WO3 nanomesh for fast detection of ppb-level NO2 at low temperature |
| title_fullStr | Nanowires-assembled WO3 nanomesh for fast detection of ppb-level NO2 at low temperature |
| title_full_unstemmed | Nanowires-assembled WO3 nanomesh for fast detection of ppb-level NO2 at low temperature |
| title_short | Nanowires-assembled WO3 nanomesh for fast detection of ppb-level NO2 at low temperature |
| title_sort | nanowires assembled wo3 nanomesh for fast detection of ppb level no2 at low temperature |
| topic | WO3 nanomesh controlling agent NO2 sensing charge transfer |
| url | https://doi.org/10.1007/s40145-019-0343-3 |
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