Journal
MODERN PHYSICS LETTERS B
Volume 35, Issue 25, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S0217984921503954
Keywords
Electrospinning; ZnO-SnO2 nanorods; sensors; ethanol sensing
Funding
- Long Yuan Youth Innovate and Entrepreneurship Talents Project in 2020 [2020RCXM188]
- Tianshui Normal University Innovation Ability Improvement Project in 2019 [CXT2019-10, CXT2019-30, CXT2019-42]
- Foundation of Natural Science Foundation of Gansu Province [20JR10RA802, 18JR3RE246, 17JR5RE349, 21JR1RE288]
- Innovate Foundation of University of Gansu Province [2021B-187, 2021A-102, 2020A-097]
- Science and Technology Supporting Program Project of Tianshui City [2018-FZJHK-2882, 2020-FZJHK-9757]
- National Natural Science Foundations of China [11764035, 61461046, 11964031]
- Tianshui Normal University
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ZnO-SnO2 composite nanorods with rough surfaces were successfully synthesized and exhibited good ethanol gas sensitivity, accurately measuring continuous ethanol concentration. The sensor also showed good selectivity to ethanol in the presence of other gases.
ZnO-SnO2 composite nanorods with rough surfaces were synthesized via a coaxially nested needle electrospinning method. The morphology and nanostructure were characterized by scanning electron microscopy, atomic force microscope, EDS mapping, nitrogen physical adsorption, and X-ray diffraction. The synthesis mechanisms of ZnO-SnO2 nanorods were discussed, which combined the gas sensitivity advantages of different materials. ZnO-SnO2 nanorods sensor with good ethanol gas sensitivity achieved accurate measurement of continuous ethanol concentration. The sensor exhibited good selectivity to ethanol in the presence of formaldehyde, methanol, acetone, acetic acid, benzene, and xylene at 290 degrees C. The response and recovery time to 100 ppm ethanol were about 13 and 35 s, respectively. The energy band, barrier, charge transfer of ZnO-SnO2 composite material was discussed, and its optimization of gas sensitivity was analyzed in detail.
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