Single-crystalline porous nanoplates-assembled ZnO hierarchical microstructure with superior TEA sensing properties
| Autor: | Guang Sun, Yanwei Li, Jianliang Cao, Hari Bala, Honghong Jin, Zhenhua Tao, Bo Zhang, Zhanying Zhang, Na Luo, Yan Wang |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
02 engineering and technology 010402 general chemistry 01 natural sciences Metal chemistry.chemical_compound Materials Chemistry Electrical and Electronic Engineering Porosity Instrumentation Triethylamine Detection limit Metals and Alloys 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Nanopore chemistry Chemical engineering visual_art visual_art.visual_art_medium 0210 nano-technology Selectivity Template method pattern |
| Zdroj: | Sensors and Actuators B: Chemical. 290:607-615 |
| ISSN: | 0925-4005 |
| DOI: | 10.1016/j.snb.2019.04.026 |
| Popis: | 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. |
| Databáze: | OpenAIRE |
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