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

Zhijie Li, Zhijie Lin, Ningning Wang, Junqiang Wang, Wei Liu, Kai Sun, Yong Qing Fu, Zhiguo Wang

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68 Citations (Scopus)
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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.
Original languageEnglish
Pages (from-to)222-231
JournalSensors and Actuators B: Chemical
Volume235
Early online date13 May 2016
DOIs
Publication statusPublished - 1 Nov 2016

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