High precision NH3 sensing using network nano-sheet Co3O4 arrays based sensor at room temperature

Li, Zhijie, Lin, Zhijie, Wang, Ningning, Wang, Junqiang, Liu, Wei, Sun, Kai, Fu, Yong Qing and Wang, Zhiguo (2016) High precision NH3 sensing using network nano-sheet Co3O4 arrays based sensor at room temperature. Sensors and Actuators B: Chemical, 235. pp. 222-231. ISSN 0925-4005

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Text Sens Actuat B High precision NH3 sensing using network nano-sheet Co3O4 arrays based sensor at room temperature final version.pdf - Accepted Version Download (1MB) | Preview

Abstract

Network nano-sheet arrays of Co3O4 for high precision NH3 sensing application were prepared on alumina tube using a facile hydrothermal process without template or surfactant, and their morphology, nanostructures and NH3 gas sensing performance were investigated. The prepared nano-sheet Co3O4 arrays showed a network structure with an average sheet thickness of 39.5 nm. Detailed structural analysis confirmed that the synthesized Co3O4 nano-sheets were consisted of nanoparticles with an average diameter of 20.0 nm. NH3 gas sensor based on these network Co3O4 nano-sheet arrays showed a low detection limit (0.2 ppm), rapid response/recovery time (9 s/134 s for 0.2 ppm NH3), good reproducibility and long-term stability for NH3 detection at room temperature.

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