| Autor: |
Shoyebmohamad F Shaikh, Balaji G Ghule, Pritamkumar V Shinde, Siddheshwar D Raut, Shyam K Gore, Mohd Ubaidullah, Rajaram S Mane, Abdullah M Al-Enizi |
| Jazyk: |
angličtina |
| Rok vydání: |
2020 |
| Předmět: |
|
| Zdroj: |
Materials Research Express, Vol 7, Iss 1, p 015076 (2020) |
| Druh dokumentu: |
article |
| ISSN: |
2053-1591 |
| DOI: |
10.1088/2053-1591/ab67fc |
| Popis: |
Mesoporous tungsten oxide nanobricks (WO _3 NBs) are successfully prepared via a simple and cost-effective hydrothermal synthesis method. The as-synthesized WO _3 NBs demonstrate a high sensitivity and selectivity when used for liquid ammonia and humidity sensor activities at room temperature (27 °C). The monoclinic crystal structure has beencorroborated from thex-ray diffraction studies and the specific surface area is estimated to be 38.74 m ^2 g ^−1 . A larger specific surface area has significantly facilitated a fast gas adsorption/desorption process. The WO _3 NBs notably exhibite gas sensitivity and selectivity for volatile organic compounds (VOCs) such as ammonia; however, a moderate performance is displayed with different oxidizing and reducing agents at room-temperature, namely: toluene, methanol, ethanol, and acetone. The sensor has offered a commercial potential with an extremely high response (75%), a 15-day operational stability at 100 ppm concentration of ammonia, and a practically remarkable ultra-high 8/5 s response/recovery time. The WO _3 NBs-based humidity sensor endows a 32% resistance response at 20% relative humidity, with a quick response/recovery time of 10/8 s; which is due to unique surface architecture of these NBs. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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