금속-유기 골격체 열분해를 통해 합성된 Co3O4/CoFe2O4 첨가 In2O3나노섬유를이용한 고감도 고선택성 에탄올 센서
Bimetallic Zeolitic Imidazolate Framework Derived Co3O4/CoFe2O4 Catalyst Loaded In2O3 Nanofibers for Highly Sensitive and Selective Ethanol Sensing
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
In this study, pure and Co3O4/CoFe2O4-loaded Indium oxide (In2O3) nanofibers were synthesized by the electrospinning of an Indium/Polyvinylpyrrolidone precursor solution containing cobalt and iron bimetallic zeolitic imidazolate frameworks and subsequent heat treatment. The ethanol, toluene, p-xylene, benzene, carbon monodxide, and hydrogen gas sensing characteristics of the solution were measured at 250–400℃. 0.5 at%-Co3O4/CoFe2O4-loaded In2O3 nanofibers exhibited extreme response (resistance ratio – 1) to 5 ppm of ethanol (210.5) at 250℃ and excellent selectivity over the interfering gases. In contrast, pure In2O3 nanofibers exhibited relatively low responses to all the analyte gases and low selectivity above 250–400℃. The superior response and selectivity toward ethanol is explained by the catalytic roles of Co3O4 and CoFe2O4 in gas sensing reaction and the electronic sensitization induced by the formation of p(Co3O4/CoFe2O4)-n (In2O3) junctions.
Abstract
In this study, pure and Co3O4/CoFe2O4-loaded Indium oxide (In2O3) nanofibers were synthesized by the electrospinning of an Indium/Polyvinylpyrrolidone precursor solution containing cobalt and iron bimetallic zeolitic imidazolate frameworks and subsequent heat treatment. The ethanol, toluene, p-xylene, benzene, carbon monodxide, and hydrogen gas sensing characteristics of the solution were measured at 250–400℃. 0.5 at%-Co3O4/CoFe2O4-loaded In2O3 nanofibers exhibited extreme response (resistance ratio – 1) to 5 ppm of ethanol (210.5) at 250℃ and excellent selectivity over the interfering gases. In contrast, pure In2O3 nanofibers exhibited relatively low responses to all the analyte gases and low selectivity above 250–400℃. The superior response and selectivity toward ethanol is explained by the catalytic roles of Co3O4 and CoFe2O4 in gas sensing reaction and the electronic sensitization induced by the formation of p(Co3O4/CoFe2O4)-n (In2O3) junctions.
참고문헌 (22)
- N. Yamazoe, "Toward innovations of gas sensor technology", Sens Actuator B Chem, 108(1-2), pp.2~14 (2005)
- Y.-M. Jo, "2D metal-organic framework derived coloading of Co3O4 and PdO nanocatalysts on In2O3 hollow spheres for tailored design of high-performance breath acetone sensors", Sens Actuator B Chem, 325, pp.128821~ (2020)
- 정성용, "화염 분무 열분해법으로 합성된 Cr-Co3O4 나노입자 자일렌 가스센서", 센서학회지, 29(2), pp.112~117 (2020), 한국센서학회
- N. Yamazoe, "Oxide semiconductor gas sensors", Catal. Surv. from Asia, 7(1), pp.63~755 (2003)
- M. E. Franke, "Metal and metal oxide nanoparticles in chemiresistors : does the nanoscale matter?", Small, 2(1), pp.36~50 (2005)
- 김도홍, "선택적 가스 센서를 위한 Au 나노입자가 장식된 TiO2 나노튜브의 합성", 센서학회지, 23(5), pp.305~309 (2014), 한국센서학회[DOI]
- 김보영, "Pt, Ni, Cr이 도포된 튜브형 SnO2 나노섬유의 합성과 가스 감응특성", 센서학회지, 23(3), pp.211~215 (2014), 한국센서학회[DOI]
- M. Penza, "NOx gas sensing characteristics of WO3 thin films activated by noble metals(Pd, Pt, Au)layers", Sens Actuator B Chem, 50(1), pp.52~59 (1998)
- C. -W. Na, "Selective detection of NO2 and C2H5OH using a Co3O4-decorated ZnO nanowire network sensor", Chem. Commun., 47(18), pp.5148~5150 (2011)
- D. R. Patil, "Cr2O3-activated ZnO thick film resistors for ammonia gas sensing operable at room temperature", Sens Actuator B Chem, 126(2), pp.368~374 (2007)
- W. Tan, "Fe2O3-loaded NiO nanosheets for fast response", recovery and high response gas sensor, 2018, pp.256, 282~293
- M. Eddaoudi, "Systematic design of pore size and functionality in isoreticular MOFs and their application in methane storage", Science, 295(5554), pp.469~472 (2002)
- J. -R. Li, "Selective gas adsorption and separation in metal–organic frameworks", Chem. Soc. Rev., 38(5), pp.1477~1504 (2009)
- N. L. Rosi, "Hydrogen storage in microporous metal-organic frameworks", Science, 300(5622), pp.1127~1129 (2003)
- C. Hu, "Porosity-Induced High Selectivity for CO2 Electroreduction to CO on Fe-Doped ZIF-Derived Carbon Catalysts", ACS Catal., 9(12), pp.11579~11588 (2019)
- J. Yang, "Hollow Zn", Co ZIF particles derived from core–shell ZIF-67@ ZIF-8 as selective catalyst for the semi-hydrogenation of acetylene, 2015, pp.127(37), 11039~11043
- Y. Jin, "Highly efficient capture of benzothiophene with a novel water-resistant-bimetallic Cu-ZIF-8 material", Inorg. Chim. Acta., 503, pp.119412~ (2020)
- W. Miao, "ZIF-8", ZIF-67-derived 3D amorphous carbonencapsulated CoS, J. Mater. Chem. A, pp.2019, 7(10)[DOI]
- M. U. Tahir, "Room temperature and aqueous synthesis of bimetallic ZIF derived CoNi layered double hydroxides and their applications in asymmetric supercapacitors", J. Collid Interface Sci., 579, pp.195~204 (2020)
- W. Hong, "Bimetallic MOF-derived FeCo-P", C nanocomposites as efficient catalysts for oxygen evolution reaction, 2018, pp.2(12), 1800214~
- X. Chu, "Ethanol gas sensor based on CoFe2O4 nano-crystallines prepared by hydrothermal method", Sens Actuator B Chem, 120(1), pp.177~181 (2006)
- Y. -M. Jo, "Metal–organic framework-derived hollow hierarchical Co3O4 nanocages with tunable size and morphology : ultrasensitive and highly selective detection of methylbenzenes", ACS Appl. Mater. Interfaces, 10(10), pp.8860~8868 (2018)