Facile Fabrication of ZnO-ZnFe2O4 Hollow Nanostructure by a One-Needle Syringe Electrospinning Method for a High-Selective H2S Gas Sensor
| Autor: | Kee-Ryung Park, Ryun Na Kim, Yoseb Song, Jinhyeong Kwon, Hyeunseok Choi |
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| Jazyk: | angličtina |
| Rok vydání: | 2022 |
| Předmět: |
Technology
Microscopy QC120-168.85 ZnFe2O4 QH201-278.5 hollow nanostructure Engineering (General). Civil engineering (General) gas sensor TK1-9971 H2S Descriptive and experimental mechanics ZnO electrospinning General Materials Science Electrical engineering. Electronics. Nuclear engineering TA1-2040 |
| Zdroj: | Materials; Volume 15; Issue 2; Pages: 399 Materials, Vol 15, Iss 399, p 399 (2022) |
| ISSN: | 1996-1944 |
| DOI: | 10.3390/ma15020399 |
| Popis: | Herein, a facile fabrication process of ZnO-ZnFe2O4 hollow nanofibers through one-needle syringe electrospinning and the following calcination process is presented. The various compositions of the ZnO-ZnFe2O4 nanofibers are simply created by controlling the metal precursor ratios of Zn and Fe. Moreover, the different diffusion rates of the metal oxides and metal precursors generate a hollow nanostructure during calcination. The hollow structure of the ZnO-ZnFe2O4 enables an enlarged surface area and increased gas sensing sites. In addition, the interface of ZnO and ZnFe2O4 forms a p-n junction to improve gas response and to lower operation temperature. The optimized ZnO-ZnFe2O4 has shown good H2S gas sensing properties of 84.5 (S = Ra/Rg) at 10 ppm at 250 °C with excellent selectivity. This study shows the good potential of p-n junction ZnO-ZnFe2O4 on H2S detection and affords a promising sensor design for a high-performance gas sensor. |
| Databáze: | OpenAIRE |
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