Realization of H₂S sensing by Pd-functionalized networked CuO nanowires in self-heating modeRealization of H2S sensing by Pd-functionalized networked CuO nanowires in self-heating mode
- Other Titles
- Realization of H2S sensing by Pd-functionalized networked CuO nanowires in self-heating mode
- Authors
- Kim, Jin-Young; Lee, Jae-Hyoung; Kim, Jae-Hun; Mirzaei, Ali; Kim, Hyoun Woo; Kim, Sang Sub
- Issue Date
- Nov-2019
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- CuO; Nanowire; Pd-functionalization; H2S sensing; Self-heating test; Gas sensor
- Citation
- SENSORS AND ACTUATORS B-CHEMICAL, v.299, pp.1 - 12
- Indexed
- SCIE
SCOPUS
- Journal Title
- SENSORS AND ACTUATORS B-CHEMICAL
- Volume
- 299
- Start Page
- 1
- End Page
- 12
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/12355
- DOI
- 10.1016/j.snb.2019.126965
- ISSN
- 0925-4005
- Abstract
- In this study, we fabricated pristine and Pd-functionalized CuO nanowires (NWs) for H₂S gas sensing. The CuO NWs were synthesized using a vapor–liquid–solid method and the Pd functionalization was achieved by ultraviolet irradiation of a Pd precursor solution in the presence of the CuO NWs. The characterization results confirmed the formation of pristine and Pd-functionalized CuO NWs with favorable compositions and morphologies. The gas-sensing response of the NWs towards H₂S was enhanced by the Pd functionalization, at 25–100 °C. Moreover, self-heating tests showed that the Pd-functionalized gas sensors exhibited a selective response to H₂S gas when a low voltage (5 V) was applied. The superior performance of the Pd-functionalized gas sensor was attributable to not only the catalytic effects of both CuS and Pd but also the CuO/Pd heterostructures. The results demonstrate that the fabricated H₂S sensors are energy-efficient and could be used in various electronic devices.
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