A nanocomposite consisting of ZnO decorated graphene oxide nanoribbons for resistive sensing of NO2 gas at room temperature
| Autor: | Long Zhang, Chao Wang, Hui Huang, Ge-Bo Pan, Zi-Yang Chen, Rui Xi, Shaohui Zhang, Da-Peng Jiang, Lu-Jia Wang |
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| Rok vydání: | 2019 |
| Předmět: |
Detection limit
Resistive touchscreen Materials science Nanocomposite Graphene Composite number Oxide Nanochemistry 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Analytical Chemistry law.invention chemistry.chemical_compound Chemical engineering chemistry law Hydrothermal synthesis 0210 nano-technology |
| Zdroj: | Microchimica Acta. 186 |
| ISSN: | 1436-5073 0026-3672 |
| DOI: | 10.1007/s00604-019-3628-x |
| Popis: | A composite prepared from zinc oxide and graphene oxide nanoribbons (ZnO/GONR) is demonstrated to enable improved room temperature (RT) detection of nitrogen dioxide (NO2). Low-cost hydrothermal synthesis is used to construct the composite. The properties of the resistive sensor, including the sensitivity, response and recovery times, repeatability and selectivity, were investigated in the NO2 concentration range from 1 to 50 ppm at RT. The sensor, typically operated at a voltage of 5 V, exhibits a low detection limit of 1 ppm, a fast response–recovery time, and excellent repeatability which outperforms that of pure ZnO sensors. The sensing mechanism is explained in terms of a redox reaction between NO2 and oxygen anions on the surface of the ZnO/GONR composite. |
| Databáze: | OpenAIRE |
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