Boosting the Humidity Performances of Na<sub>0.5</sub>Bi<sub>x</sub>TiO<sub>3</sub> by Tuning Bi Content
In the field of humidity sensors, a major challenge is how to improve the sensing performance of existing materials. Based on our previous work on Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub>, a facile strategy of tuning the Bi content in the material was propo...
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| Format: | Article |
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MDPI AG
2022-07-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/14/2498 |
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| author | Xiaoqi Xuan Li Li Tiantian Li Jingsong Wang Yi Yu Chunchang Wang |
| author_facet | Xiaoqi Xuan Li Li Tiantian Li Jingsong Wang Yi Yu Chunchang Wang |
| author_sort | Xiaoqi Xuan |
| collection | DOAJ |
| description | In the field of humidity sensors, a major challenge is how to improve the sensing performance of existing materials. Based on our previous work on Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub>, a facile strategy of tuning the Bi content in the material was proposed to improve its sensing performance. Na<sub>0.5</sub>Bi<sub>x</sub>TiO<sub>3</sub> (x = 0.3, 0.35, 0.4, 0.45) nanocomposites were synthesized by a hydrothermal method. Humidity sensing properties of these nanocomposites were investigated in the relative humidity range of 11% to 95%. Our results show that, compared to the sensor based on nominally pure sample (Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub>), the sensor based on Na<sub>0.5</sub>Bi<sub>0.35</sub>TiO<sub>3</sub> exhibits boosted sensing performance of excellent linear humidity response in the humidity range of 11–75% relative humidity, lower hysteresis value, and faster response/recovery time. The improvement of the sensing performance was argued to be the reason that the proper reduction in Bi content leads to a minimum value of oxygen-vacancy concentrations, thereby weakening the chemical adsorption but enhancing the physical adsorption. These results indicate that the proper underdose of the Bi content in Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> can greatly boost the sensing performance. |
| first_indexed | 2024-03-09T10:14:43Z |
| format | Article |
| id | doaj.art-c1527bfb9b464f3fa434253758524bf3 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T10:14:43Z |
| publishDate | 2022-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-c1527bfb9b464f3fa434253758524bf32023-12-01T22:31:31ZengMDPI AGNanomaterials2079-49912022-07-011214249810.3390/nano12142498Boosting the Humidity Performances of Na<sub>0.5</sub>Bi<sub>x</sub>TiO<sub>3</sub> by Tuning Bi ContentXiaoqi Xuan0Li Li1Tiantian Li2Jingsong Wang3Yi Yu4Chunchang Wang5Laboratory of Dielectric Functional Materials, School of Materials Science & Engineering, Anhui University, Hefei 230601, ChinaLaboratory of Dielectric Functional Materials, School of Materials Science & Engineering, Anhui University, Hefei 230601, ChinaLaboratory of Dielectric Functional Materials, School of Materials Science & Engineering, Anhui University, Hefei 230601, ChinaLaboratory of Dielectric Functional Materials, School of Materials Science & Engineering, Anhui University, Hefei 230601, ChinaLaboratory of Dielectric Functional Materials, School of Materials Science & Engineering, Anhui University, Hefei 230601, ChinaLaboratory of Dielectric Functional Materials, School of Materials Science & Engineering, Anhui University, Hefei 230601, ChinaIn the field of humidity sensors, a major challenge is how to improve the sensing performance of existing materials. Based on our previous work on Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub>, a facile strategy of tuning the Bi content in the material was proposed to improve its sensing performance. Na<sub>0.5</sub>Bi<sub>x</sub>TiO<sub>3</sub> (x = 0.3, 0.35, 0.4, 0.45) nanocomposites were synthesized by a hydrothermal method. Humidity sensing properties of these nanocomposites were investigated in the relative humidity range of 11% to 95%. Our results show that, compared to the sensor based on nominally pure sample (Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub>), the sensor based on Na<sub>0.5</sub>Bi<sub>0.35</sub>TiO<sub>3</sub> exhibits boosted sensing performance of excellent linear humidity response in the humidity range of 11–75% relative humidity, lower hysteresis value, and faster response/recovery time. The improvement of the sensing performance was argued to be the reason that the proper reduction in Bi content leads to a minimum value of oxygen-vacancy concentrations, thereby weakening the chemical adsorption but enhancing the physical adsorption. These results indicate that the proper underdose of the Bi content in Na<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> can greatly boost the sensing performance.https://www.mdpi.com/2079-4991/12/14/2498hydrothermal methodsensorshumidity sensinglinear response |
| spellingShingle | Xiaoqi Xuan Li Li Tiantian Li Jingsong Wang Yi Yu Chunchang Wang Boosting the Humidity Performances of Na<sub>0.5</sub>Bi<sub>x</sub>TiO<sub>3</sub> by Tuning Bi Content Nanomaterials hydrothermal method sensors humidity sensing linear response |
| title | Boosting the Humidity Performances of Na<sub>0.5</sub>Bi<sub>x</sub>TiO<sub>3</sub> by Tuning Bi Content |
| title_full | Boosting the Humidity Performances of Na<sub>0.5</sub>Bi<sub>x</sub>TiO<sub>3</sub> by Tuning Bi Content |
| title_fullStr | Boosting the Humidity Performances of Na<sub>0.5</sub>Bi<sub>x</sub>TiO<sub>3</sub> by Tuning Bi Content |
| title_full_unstemmed | Boosting the Humidity Performances of Na<sub>0.5</sub>Bi<sub>x</sub>TiO<sub>3</sub> by Tuning Bi Content |
| title_short | Boosting the Humidity Performances of Na<sub>0.5</sub>Bi<sub>x</sub>TiO<sub>3</sub> by Tuning Bi Content |
| title_sort | boosting the humidity performances of na sub 0 5 sub bi sub x sub tio sub 3 sub by tuning bi content |
| topic | hydrothermal method sensors humidity sensing linear response |
| url | https://www.mdpi.com/2079-4991/12/14/2498 |
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