Facile Fabrication of ZnO-ZnFe2O4 Hollow Nanostructure by a One-Needle Syringe Electrospinning Method for a High-Selective H2S Gas Sensor

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. Moreo...

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Bibliographic Details
Published in:Materials 2022-01, Vol.15 (2), p.399
Main Authors: Park, Kee-Ryung, Kim, Ryun Na, Song, Yoseb, Kwon, Jinhyeong, Choi, Hyeunseok
Format: Article
Language:English
Subjects:
Diffusion rate
Electrospinning
Ethanol
Gas sensors
Gases
Hydrogen sulfide
Iron
Metal oxides
Microscopy
Nanofibers
Nanomaterials
Nanostructure
Nitrates
Nitrogen
P-n junctions
Precursors
Ratios
Roasting
Selectivity
Sensors
Spectrum analysis
Syringes
Zinc ferrites
Zinc oxide
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Summary: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.
ISSN:1996-1944
1996-1944
DOI:10.3390/ma15020399