One-step facile synthesis of a NiO/ZnO biomorphic nanocomposite using a poplar tree leaf template to generate an enhanced gas sensing platform to detect n-butanol
| Autor: | Jun-tong Feng, Sheng-zhe Wang, Wei Feng, Hang Liu, Xin-chen Lin, Zhao-jun Dong, Yue Zhao, Qing-rui Zeng |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Nanocomposite Morphology (linguistics) Mechanical Engineering Non-blocking I/O Metals and Alloys chemistry.chemical_element Heterojunction One-Step 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Oxygen 0104 chemical sciences chemistry.chemical_compound chemistry Chemical engineering Mechanics of Materials n-Butanol Materials Chemistry 0210 nano-technology Selectivity |
| Zdroj: | Journal of Alloys and Compounds. 815:150550 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2019.05.018 |
| Popis: | Fabricating gas sensors with a facile, environmentally benign method to detect chemical vapor with high sensitivity and selectivity is of great importance for environmental monitoring. A biomorphic NiO/ZnO nanocomposite has been facilely synthesized in one step using a poplar tree leaf template (PTLT). A PTLT NiO/ZnO nanocomposite was constructed with the generic form of a PTLT and the morphology resembled the spongy structure of mesophyll tissue. Compared to routine ZnO-based materials, the PTLT NiO/ZnO nanocompite, generated with the biomorphic template, had a smaller average size and exhibited a p-n heterojunction at the n-type ZnO interface. PTLT NiO/ZnO detected n-butanol with great sensitivity (Rair/Rgas = 106-100 ppm) and selectivity (5–10 times greater response than the other vapors) at 240 °C as a gas sensor on a gas sensing platform. Compared to PTLT ZnO, PTLT NiO/ZnO demonstrated enhanced gas sensing properties, which were attributed to high concentration of oxygen vacancies and the formation of p-n heterojunctions. |
| Databáze: | OpenAIRE |
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