Metal-organic frameworks-driven ZnO-functionalized carbon nanotube fiber for NO2 sensor
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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.
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.
참고문헌 (24)
- W. Huang, "UV–Ozone interfacial modification in organic transistors for high-sensitivity NO2 detection", Adv. Mater, 29(31), pp.1701706(1)~1701706(11) (2017)
- S. Cole, "New NASA Satellite Maps Show Human Fingerprint on Global Air Quality", NASA, RELEASE 15-233, ~ (2015)
- B. Yoon, "Selective acetate recognition and sensing using SWCNTs functionalized with croconamides", Sens. Actuators B-Chem, 346, pp.130461(1)~130461(8) (2021)
- S. J. Choi, "Chemiresistors for the Real-Time Wireless Detection of Anions", Adv. Func. Mater, 30(7), pp.1907087(1)~1907087(9) (2020)
- S. J. Choi, "All-carbon fiber-based chemical sensor : Improved reversible NO2 reaction kinetics", Sens. Actuators B-Chem, 290, pp.293~301 (2019)
- T. Kawano, "An electrothermal carbon nanotube gas sensor", Nano Lett., 7(12), pp.3686~3690 (2007)
- J. Y. Kang, "2D layer assembly of Pt-ZnO nanoparticles on reduced graphene oxide for flexible NO2 sensors", Sens. Actuators B-Chem, 331, pp.129371(1)~129371(10) (2021)
- S. J. Choi, "All-carbon fiber-based chemical sensor : Improved reversible NO2 reaction kinetics", Sens. Actuators B-Chem, 290, pp.293~301 (2019)
- H. Furukawa, "Ultrahigh porosity in metal-organic frameworks", Science, 329(5990), pp.424~428 (2010)
- O. K. Farha, "De novo synthesis of a metal–organic framework material featuring ultrahigh surface area and gas storage capacities", Nat. Chem., 2(11), pp.944~948 (2010)
- W. T. Koo, "Metal-organic frameworks for chemiresistive sensors", Chem, 5(8), pp.1938~1963 (2019)
- D. J. Tranchemontagne, "Secondary building units, nets and bonding in the chemistry of metal-organic frameworks", Chem. Soc. Rev., 38(5), pp.1257~1283 (2009)
- P. Pachfule, "One-dimensional confinement of a nanosized metal organic framework in carbon nanofibers for improved gas adsorption", Chem. Commun., 48(14), pp.2009~2011 (2012)
- Y. Zhang, "Facile synthesis of a Cu-based MOF confined in macroporous carbon hybrid material with enhanced electrocatalytic ability", Chem. Commun., 49(61), pp.6885~6887 (2013)
- Y. Zhang, "Electrocatalytically active cobalt-based metal–organic framework with incorporated macroporous carbon composite for electrochemical applications", J. Mater. Chem. A, 3(2), pp.732~738 (2015)
- C. Petit, "Exploring the coordination chemistry of MOF–graphite oxide composites and their applications as adsorbents", Dalton Trans., 41(14), pp.4027~4035 (2012)
- Z. Xiang, "Metal–organic frameworks with incorporated carbon nanotubes : improving carbon dioxide and methane storage capacities by lithium doping", Angew. Chem., Int. Ed, 50(2), pp.491~494 (2011)
- Y. Yang, "In situ synthesis of zeolitic imidazolate frameworks", carbon nanotube composites with enhanced CO2 adsorption, 2014, pp.43(19), 7028~7036
- R. Lin, "Mixedmatrix membranes with metal–organic framework-decorated CNT fillers for efficient CO2 separation", ACS Appl. Mater. Interfaces, 7(27), pp.14750~14757 (2015)
- A. W. Thornton, "Metal-organic frameworks impregnated with magnesium-decorated fullerenes for methane and hydrogen storage", J. Am. Chem. Soc., 131(30), pp.10662~10669 (2009)
- W. T. Koo, "Heterogeneous sensitization of metal–organic framework driven metal@metal oxide complex catalysts on an oxide nanofiber scaffold toward superior gas sensors", J. Am. Chem. Soc., 138(40), pp.13431~13437 (2016)
- S. J. Choi, "Nitrogen-Doped Single Graphene Fiber with Platinum Water Dissociation Catalyst for Wearable Humidity Sensor", Small, 14(13), pp.1703934(1)~1703934(9) (2018)
- J. Wei, "Nitrogen-doped nanoporous carbon", graphene nano-sandwiches : Synthesis and application for efficient oxygen reduction, 2015, pp.25(36), 5768~5777
- P. Lin, "Simultaneously functionalization and reduction of graphene oxide containing isocyanate groups", Appl. Surf. Sci., 324, pp.784~790 (2015)