Facile Synthesis of Template‐Free SnS 2 with Different Morphologies and Excellent Gas‐Sensing Performance for NO 2 Gas‐Sensor Applications
Herein, SnS 2 particles with two different morphologies are synthesized using a template‐free one‐step hydrothermal method. Flower‐ and plate‐like SnS 2 are obtained using different solvents, ethyl alcohol, and deionized water, respectively, under the same synthesis conditions. The flower‐like SnS 2...
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| Published in | Physica status solidi. A, Applications and materials science Vol. 219; no. 20 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
01.10.2022
|
| Online Access | Get full text |
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| Abstract | Herein, SnS
2
particles with two different morphologies are synthesized using a template‐free one‐step hydrothermal method. Flower‐ and plate‐like SnS
2
are obtained using different solvents, ethyl alcohol, and deionized water, respectively, under the same synthesis conditions. The flower‐like SnS
2
had a larger surface area and higher concentration of sulfur vacancies than plate‐like SnS
2
. The effects of the specific surface area and the number of sulfur vacancies in the gas‐sensing materials are studied using the gas‐sensing characteristics of SnS
2
in the two morphologies. The gas sensitivities at 25 °C under 1 ppm NO
2
are 73.5 and 129.5 for flower‐ and plate‐like SnS
2
, respectively. Both the flower‐ and plate‐like SnS
2
gas sensors exhibited good gas selectivity for NO
2
against SO
2
, CO, and NH
3
at 25 °C. The response and recovery times are 540 and 1407 s for the flower‐like SnS
2
and 214 and 18 s for the plate‐like SnS
2
, respectively. It is confirmed that a large specific surface area and the number of sulfur vacancies adversely affected the response and recovery times. Therefore, the plate‐like gas sensor is expected to be a good candidate for NO
2
gas‐sensing applications at 27 °C. |
|---|---|
| AbstractList | Herein, SnS
2
particles with two different morphologies are synthesized using a template‐free one‐step hydrothermal method. Flower‐ and plate‐like SnS
2
are obtained using different solvents, ethyl alcohol, and deionized water, respectively, under the same synthesis conditions. The flower‐like SnS
2
had a larger surface area and higher concentration of sulfur vacancies than plate‐like SnS
2
. The effects of the specific surface area and the number of sulfur vacancies in the gas‐sensing materials are studied using the gas‐sensing characteristics of SnS
2
in the two morphologies. The gas sensitivities at 25 °C under 1 ppm NO
2
are 73.5 and 129.5 for flower‐ and plate‐like SnS
2
, respectively. Both the flower‐ and plate‐like SnS
2
gas sensors exhibited good gas selectivity for NO
2
against SO
2
, CO, and NH
3
at 25 °C. The response and recovery times are 540 and 1407 s for the flower‐like SnS
2
and 214 and 18 s for the plate‐like SnS
2
, respectively. It is confirmed that a large specific surface area and the number of sulfur vacancies adversely affected the response and recovery times. Therefore, the plate‐like gas sensor is expected to be a good candidate for NO
2
gas‐sensing applications at 27 °C. |
| Author | Shin, Se-Hee Ro, Jae Chul Suh, Su-Jeong Park, Jong-Hwan Ahn, Byung-Wook |
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| Snippet | Herein, SnS
2
particles with two different morphologies are synthesized using a template‐free one‐step hydrothermal method. Flower‐ and plate‐like SnS
2
are... |
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| Title | Facile Synthesis of Template‐Free SnS 2 with Different Morphologies and Excellent Gas‐Sensing Performance for NO 2 Gas‐Sensor Applications |
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