Metal-organic frameworks-driven ZnO-functionalized carbon nanotube fiber for NO2 sensor
- Title
- Metal-organic frameworks-driven ZnO-functionalized carbon nanotube fiber for NO2 sensor
- Other Titles
- Metal-organic frameworks-driven ZnO-functionalized carbon nanotube fiber for NO2 sensor
- Author
- 최선진
- Keywords
- Carbon nanotube fiber (CNTF); Self-heating; Gas sensors; NO2.; Metal-organic frameworks (MOFs)
- Issue Date
- 2021-11
- Publisher
- 한국센서학회
- Citation
- 센서학회지, v. 30, NO. 6, Page. 369-375
- Abstract
- In this study, heterogeneous ZnO/CNTF composites were developed to improve the NO2-sensing response, facilitated by the selfheating property. Highly conductive and mechanically stable CNTFs were prepared by a wet-spinning process assisted by the liquid crystal (LC) behavior of CNTs. Metal-organic frameworks (MOFs) of ZIF-8 were precipitated on the surface of the CNTF (ZIF-8/CNTF) via one-pot synthesis in solution. The subsequent calcination process resulted in the formation of the ZnO/CNTF composites.The calcination temperatures were controlled at 400, 500, and 600oC in an N2 atmosphere to confirm the evolution of the microstructures and NO2-sensing properties. Gas sensor characterization was performed at 100oC by applying a DC voltage to induce Joule heating through the CNTF. The results revealed that the ZnO/CNTF composite after calcination at 500oC (ZnO/CNTF-500) exhibited an improved response (Rair/Rgas = 1.086) toward 20 ppm NO2 as compared to the pristine CNTF (Rair/Rgas = 1.063). Selective NO2-sensing properties were demonstrated with negligible responses toward interfering gas species such as H2S, NH3, CO, and toluene. Our approach for the synthesis of MOF-driven ZnO/CNTF composites can provide a new strategy for the fabrication of wearable gas sensors integrated with textile materials.
- URI
- http://jsstec.org/_common/do.php?a=full&bidx=2766&aidx=31249https://repository.hanyang.ac.kr/handle/20.500.11754/176261
- ISSN
- 1225-5475;2093-7563
- DOI
- 10.46670/JSST.2021.30.6.369
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > MATERIALS SCIENCE AND ENGINEERING(신소재공학부) > Articles
- Files in This Item:
- 85225_최선진.pdfDownload
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