Improvement of Ethanol Gas-Sensing Responses of ZnO–WO<sub>3</sub> Composite Nanorods through Annealing Induced Local Phase Transformation
In this study, ZnO−WO<sub>3</sub> composite nanorods were synthesized through a combination of hydrothermal growth and sputtering method. The structural analysis results revealed that the as-synthesized composite nanorods had a homogeneous coverage of WO<sub>3</sub>...
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| Format: | Article |
| Language: | English |
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MDPI AG
2019-04-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/9/5/669 |
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| author | Yuan-Chang Liang Che-Wei Chang |
| author_facet | Yuan-Chang Liang Che-Wei Chang |
| author_sort | Yuan-Chang Liang |
| collection | DOAJ |
| description | In this study, ZnO−WO<sub>3</sub> composite nanorods were synthesized through a combination of hydrothermal growth and sputtering method. The structural analysis results revealed that the as-synthesized composite nanorods had a homogeneous coverage of WO<sub>3</sub> crystallite layer. Moreover, the ZnO−WO<sub>3</sub> composite nanorods were in a good crystallinity. Further post-annealed the composite nanorods in a hydrogen-containing atmosphere at 400 °C induced the local phase transformation between the ZnO and WO<sub>3</sub>. The ZnO−WO<sub>3</sub> composite nanorods after annealing engendered the coexistence of ZnWO<sub>4</sub> and WO<sub>3</sub> phase in the shell layer which increased the potential barrier number at the interfacial contact region with ZnO. This further enhanced the ethanol gas-sensing response of the pristine ZnO−WO<sub>3</sub> composite nanorods. The experimental results herein demonstrated a proper thermal annealing procedure of the binary composite nanorods is a promising approach to modulate the gas-sensing behavior the binary oxide composite nanorods. |
| first_indexed | 2024-12-22T14:44:35Z |
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| id | doaj.art-3083036adac342ee85ac37aeeded287f |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-12-22T14:44:35Z |
| publishDate | 2019-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-3083036adac342ee85ac37aeeded287f2022-12-21T18:22:28ZengMDPI AGNanomaterials2079-49912019-04-019566910.3390/nano9050669nano9050669Improvement of Ethanol Gas-Sensing Responses of ZnO–WO<sub>3</sub> Composite Nanorods through Annealing Induced Local Phase TransformationYuan-Chang Liang0Che-Wei Chang1Institute of Materials Engineering, National Taiwan Ocean University, Keelung 20224, TaiwanUndergraduate Program in Optoelectronics and Materials Technology, National Taiwan Ocean University, Keelung 20224, TaiwanIn this study, ZnO−WO<sub>3</sub> composite nanorods were synthesized through a combination of hydrothermal growth and sputtering method. The structural analysis results revealed that the as-synthesized composite nanorods had a homogeneous coverage of WO<sub>3</sub> crystallite layer. Moreover, the ZnO−WO<sub>3</sub> composite nanorods were in a good crystallinity. Further post-annealed the composite nanorods in a hydrogen-containing atmosphere at 400 °C induced the local phase transformation between the ZnO and WO<sub>3</sub>. The ZnO−WO<sub>3</sub> composite nanorods after annealing engendered the coexistence of ZnWO<sub>4</sub> and WO<sub>3</sub> phase in the shell layer which increased the potential barrier number at the interfacial contact region with ZnO. This further enhanced the ethanol gas-sensing response of the pristine ZnO−WO<sub>3</sub> composite nanorods. The experimental results herein demonstrated a proper thermal annealing procedure of the binary composite nanorods is a promising approach to modulate the gas-sensing behavior the binary oxide composite nanorods.https://www.mdpi.com/2079-4991/9/5/669sputteringcomposite nanorodsphase transformationannealing |
| spellingShingle | Yuan-Chang Liang Che-Wei Chang Improvement of Ethanol Gas-Sensing Responses of ZnO–WO<sub>3</sub> Composite Nanorods through Annealing Induced Local Phase Transformation Nanomaterials sputtering composite nanorods phase transformation annealing |
| title | Improvement of Ethanol Gas-Sensing Responses of ZnO–WO<sub>3</sub> Composite Nanorods through Annealing Induced Local Phase Transformation |
| title_full | Improvement of Ethanol Gas-Sensing Responses of ZnO–WO<sub>3</sub> Composite Nanorods through Annealing Induced Local Phase Transformation |
| title_fullStr | Improvement of Ethanol Gas-Sensing Responses of ZnO–WO<sub>3</sub> Composite Nanorods through Annealing Induced Local Phase Transformation |
| title_full_unstemmed | Improvement of Ethanol Gas-Sensing Responses of ZnO–WO<sub>3</sub> Composite Nanorods through Annealing Induced Local Phase Transformation |
| title_short | Improvement of Ethanol Gas-Sensing Responses of ZnO–WO<sub>3</sub> Composite Nanorods through Annealing Induced Local Phase Transformation |
| title_sort | improvement of ethanol gas sensing responses of zno wo sub 3 sub composite nanorods through annealing induced local phase transformation |
| topic | sputtering composite nanorods phase transformation annealing |
| url | https://www.mdpi.com/2079-4991/9/5/669 |
| work_keys_str_mv | AT yuanchangliang improvementofethanolgassensingresponsesofznowosub3subcompositenanorodsthroughannealinginducedlocalphasetransformation AT cheweichang improvementofethanolgassensingresponsesofznowosub3subcompositenanorodsthroughannealinginducedlocalphasetransformation |