Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect
Brush-like α-Fe<sub>2</sub>O<sub>3</sub>–ZnO heterostructures were synthesized through a sputtering ZnO seed-assisted hydrothermal growth method. The resulting heterostructures consisted of α-Fe<sub>2</sub>O<sub>3</sub> rod templates and ZnO branched c...
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MDPI AG
2021-06-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/22/13/6884 |
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| author | Yuan-Chang Liang Yu-Wei Hsu |
| author_facet | Yuan-Chang Liang Yu-Wei Hsu |
| author_sort | Yuan-Chang Liang |
| collection | DOAJ |
| description | Brush-like α-Fe<sub>2</sub>O<sub>3</sub>–ZnO heterostructures were synthesized through a sputtering ZnO seed-assisted hydrothermal growth method. The resulting heterostructures consisted of α-Fe<sub>2</sub>O<sub>3</sub> rod templates and ZnO branched crystals with an average diameter of approximately 12 nm and length of 25 nm. The gas-sensing results demonstrated that the α-Fe<sub>2</sub>O<sub>3</sub>–ZnO heterostructure-based sensor exhibited excellent sensitivity, selectivity, and stability toward low-concentration NO<sub>2</sub> gas at an optimal temperature of 300 °C. The α-Fe<sub>2</sub>O<sub>3</sub>–ZnO sensor, in particular, demonstrated substantially higher sensitivity compared with pristine α-Fe<sub>2</sub>O<sub>3</sub>, along with faster response and recovery speeds under similar test conditions. An appropriate material synergic effect accounts for the considerable enhancement in the NO<sub>2</sub> gas-sensing performance of the α-Fe<sub>2</sub>O<sub>3</sub>–ZnO heterostructures. |
| first_indexed | 2024-03-09T04:51:53Z |
| format | Article |
| id | doaj.art-53c1398b613444aaac55124948bb97b7 |
| institution | Directory Open Access Journal |
| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-09T04:51:53Z |
| publishDate | 2021-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-53c1398b613444aaac55124948bb97b72023-12-03T13:10:10ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672021-06-012213688410.3390/ijms22136884Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic EffectYuan-Chang Liang0Yu-Wei Hsu1Department of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 20224, TaiwanDepartment of Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 20224, TaiwanBrush-like α-Fe<sub>2</sub>O<sub>3</sub>–ZnO heterostructures were synthesized through a sputtering ZnO seed-assisted hydrothermal growth method. The resulting heterostructures consisted of α-Fe<sub>2</sub>O<sub>3</sub> rod templates and ZnO branched crystals with an average diameter of approximately 12 nm and length of 25 nm. The gas-sensing results demonstrated that the α-Fe<sub>2</sub>O<sub>3</sub>–ZnO heterostructure-based sensor exhibited excellent sensitivity, selectivity, and stability toward low-concentration NO<sub>2</sub> gas at an optimal temperature of 300 °C. The α-Fe<sub>2</sub>O<sub>3</sub>–ZnO sensor, in particular, demonstrated substantially higher sensitivity compared with pristine α-Fe<sub>2</sub>O<sub>3</sub>, along with faster response and recovery speeds under similar test conditions. An appropriate material synergic effect accounts for the considerable enhancement in the NO<sub>2</sub> gas-sensing performance of the α-Fe<sub>2</sub>O<sub>3</sub>–ZnO heterostructures.https://www.mdpi.com/1422-0067/22/13/6884synthesismicrostructurecompositesensing abilityenhanced mechanism |
| spellingShingle | Yuan-Chang Liang Yu-Wei Hsu Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect International Journal of Molecular Sciences synthesis microstructure composite sensing ability enhanced mechanism |
| title | Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect |
| title_full | Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect |
| title_fullStr | Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect |
| title_full_unstemmed | Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect |
| title_short | Enhanced Sensing Ability of Brush-Like Fe<sub>2</sub>O<sub>3</sub>-ZnO Nanostructures towards NO<sub>2</sub> Gas via Manipulating Material Synergistic Effect |
| title_sort | enhanced sensing ability of brush like fe sub 2 sub o sub 3 sub zno nanostructures towards no sub 2 sub gas via manipulating material synergistic effect |
| topic | synthesis microstructure composite sensing ability enhanced mechanism |
| url | https://www.mdpi.com/1422-0067/22/13/6884 |
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