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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.
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참고문헌 (22)
참고문헌 신청
N. Yamazoe / 2005 / Toward innovations of gas sensor technology / Sens Actuator B Chem 108(1-2):2~14
Y.-M. Jo / 2020 / 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 325:128821
정성용 / 2020 / 화염 분무 열분해법으로 합성된 Cr-Co3O4 나노입자 자일렌 가스센서 / 센서학회지 29(2):112~117
N. Yamazoe / 2003 / Oxide semiconductor gas sensors / Catal. Surv. from Asia 7(1):63~755
M. E. Franke / 2005 / Metal and metal oxide nanoparticles in chemiresistors : does the nanoscale matter? / Small 2(1):36~50
Y.-M. Jo / 2020 / 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 325:128821
정성용 / 2020 / 화염 분무 열분해법으로 합성된 Cr-Co3O4 나노입자 자일렌 가스센서 / 센서학회지 29(2):112~117
N. Yamazoe / 2003 / Oxide semiconductor gas sensors / Catal. Surv. from Asia 7(1):63~755
M. E. Franke / 2005 / Metal and metal oxide nanoparticles in chemiresistors : does the nanoscale matter? / Small 2(1):36~50
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