Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 852, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2020.157014
Keywords
Electro spinning; Gas sensor; CuO; ZnO; Hetero structure; H2S
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Funding
- Ministry of Science and Technology, Taiwan [MOST 1062221-E-992-333-MY3, 106-2221-E-992-343-MY3]
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CuO-doped ZnO heterojunction nanofibers were successfully prepared using sol-gel and electrospinning methods. The sensing response of H2S was significantly enhanced when the mole ratio of CuO to ZnO was 0.15:1, reaching a best gas response of 83.98% at 1 ppm H2S.
In this study, a sol-gel method and an electrospinning method were used to prepare CuO-doped ZnO heterojunction nanofibers. The CuO-doped ZnO nanofibers were grown on interdigitated gold electrode substrates and then used in gas sensors. We found that when the mole ratio of CuO to ZnO was 0.15: 1, the sensing response of H2S was greatly enhanced and was 25% higher than that obtained using pure ZnO nanofibers. The best H2S gas response was 83.98% at 1 ppm H2S at 200 degrees C, with good recovery and reproducibility. (C) 2020 Elsevier B.V. All rights reserved.
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