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Sensors 2019, 19(3), 726; https://doi.org/10.3390/s19030726

Enhanced Hydrogen Detection in ppb-Level by Electrospun SnO2-Loaded ZnO Nanofibers

Department of Materials Science and Engineering, Inha University, Incheon 22212, Korea
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Received: 2 January 2019 / Revised: 1 February 2019 / Accepted: 8 February 2019 / Published: 11 February 2019
(This article belongs to the Section Chemical Sensors)
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Abstract

High-performance hydrogen sensors are important in many industries to effectively address safety concerns related to the production, delivering, storage and use of H2 gas. Herein, we present a highly sensitive hydrogen gas sensor based on SnO2-loaded ZnO nanofibers (NFs). The xSnO2-loaded (x = 0.05, 0.1 and 0.15) ZnO NFs were fabricated using an electrospinning technique followed by calcination at high temperature. Microscopic analyses demonstrated the formation of NFs with expected morphology and chemical composition. Hydrogen sensing studies were performed at various temperatures and the optimal working temperature was selected as 300 °C. The optimal gas sensor (0.1 SnO2 loaded ZnO NFs) not only showed a high response to 50 ppb hydrogen gas, but also showed an excellent selectivity to hydrogen gas. The excellent performance of the gas sensor to hydrogen gas was mainly related to the formation of SnO2-ZnO heterojunctions and the metallization effect of ZnO. View Full-Text
Keywords: SnO2; electrospinning; nanofiber; sensing mechanism; hydrogen gas SnO2; electrospinning; nanofiber; sensing mechanism; hydrogen gas
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Lee, J.-H.; Kim, J.-Y.; Kim, J.-H.; Kim, S.S. Enhanced Hydrogen Detection in ppb-Level by Electrospun SnO2-Loaded ZnO Nanofibers. Sensors 2019, 19, 726.

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