Single-crystalline porous nanoplates-assembled ZnO hierarchical microstructure with superior TEA sensing properties

[Display omitted] •A ZnO HMS was synthesized via a sacrificial template method.•The ZnO HMS features an assembly of single-crystalline porous nanoplates.•The sensor based on ZnO HMS shows superior sensing properties to TEA. Fabricating hierarchical structures has emerged as a powerful strategy to im...

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Published inSensors and actuators. B, Chemical Vol. 290; pp. 607 - 615
Main Authors Li, Yanwei, Tao, Zhenhua, Luo, Na, Sun, Guang, Zhang, Bo, Jin, Honghong, Bala, Hari, Cao, Jianliang, Zhang, Zhanying, Wang, Yan
Format Journal Article
LanguageEnglish
Published Lausanne Elsevier B.V 01.07.2019
Elsevier Science Ltd
Subjects
Crystal structure
Crystallinity
Detection
Gas sensing mechanism
Gas sensors
Hierarchical structure
Linearity
Metal oxide semiconductors
Microstructure
Porosity
Porous nanoplates
Selectivity
Single crystals
Structural hierarchy
TEA sensor
Triethylamine
Zinc oxide
ZnO
ZnO
TEA sensor
Porous nanoplates
Gas sensing mechanism
Hierarchical structure
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Summary:[Display omitted] •A ZnO HMS was synthesized via a sacrificial template method.•The ZnO HMS features an assembly of single-crystalline porous nanoplates.•The sensor based on ZnO HMS shows superior sensing properties to TEA. Fabricating hierarchical structures has emerged as a powerful strategy to improve the gas-sensing performance of metal oxide semiconductor (MOS). In this work, we reported the synthesis of a hierarchical microstructure (HMS) of ZnO via a reliable sacrificial template method and its superior sensing performance to triethylamine (TEA). The synthesized ZnO HMS features an orderly assembly of single-crystalline porous nanoplates with the mean thickness about 27.7 nm, on which island-like nanopores are in situ created during the decomposition of Zn5(CO3)2(OH)6 sacrificial template. At the optimal working temperature (OWT) of 270 °C, the detection limit of the sensor based on ZnO HMS to TEA is as low as 50 ppb, and the sensitivity towards 50–2000 ppb TEA is as high as 20.69/ppm. Besides, the sensor also exhibits excellent selectivity, rapid response-recover rate, and good response linearity within a wide TEA concentration range from 50 ppb to 300 ppm. These characteristics make the present ZnO HMS a promising candidate for practical detection of TEA. The gas sensing mechanism was discussed in detail.
ISSN:0925-4005
1873-3077
DOI:10.1016/j.snb.2019.04.026