| 학회 |
한국재료학회 |
| 학술대회 |
2021년 가을 (11/24 ~ 11/26, 경주 라한호텔) |
| 권호 |
27권 2호 |
| 발표분야 |
E. 환경/센서 재료 분과 |
| 제목 |
Chemiresistive gas-sensing properties of ternary nickel cobaltite nanostructures |
| 초록 |
In recent years, facile synthesis of well-defined hierarchical nanostructures has been widely recognized due to their excellent gas detection performance, as the detection performance is controlled by surface reactions. In this regard, we introduce a simple approach to synthesizing different nickel cobaltite nanostructures for the detection of ethanol gas. Prior to gas sensing studies, the structure and surface morphology of synthesized ternary nickel cobaltite nanostructures was analyzed using various characterization techniques and discussed. The formation of a cubic spinel structure of nickel cobaltite with nanoplatelet-like surface morphology was confirmed by characterization analysis. Chemiresistive gas-sensing studies have demonstrated that the ternary nickel cobaltite nanostructures selectively detect wide 10-1000 ppm concentrations of ethanol at 140 °C with excellent response and recovery characteristics. Among various fabricated nickel cobaltite sensors, the sensor treated at 9 h displayed maximum response of 73% to 1000 ppm of ethanol 140 °C. The observed ethanol detection performance of nickel cobaltite sensors is attributed to the hierarchical nanoplatelets-like structures which provided greater surfaces and mesopores for ethanol gas molecules for improved surface reactions and rapid gas diffusion. |
| 저자 |
Sachin T. Navale1, 김진영2, 남명성2, Florian Stadler3, 김현우4, 김상섭1
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| 소속 |
1한양대, 2인하대, 3College of Materials Science and Engineering, 4Shenzhen Univ. |
| 키워드 |
Nickel cobaltite nanostructure; Chemiresistive gas-sensing; Ethanol; Sensitivity
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| E-Mail |
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