期刊
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
卷 40, 期 45, 页码 15773-15779出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2015.09.077
关键词
SnO2; Nanomaterial; Morphology; Hydrogen; Gas sensor
资金
- National Natural Science Foundation of China [51422402, 61403263]
- Fundamental Research Funds for the Central Universities [N140105002, N130301003]
- Program for Liaoning Excellent Talents in University [LJQ2013025]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20130042120033]
- Scientific Research Foundation for the Returned Overseas Chinese Scholars, State Education Ministry [47-3]
SnO2 nanomaterials with different morphologies, such as nanofilms, nanorods, and nanowires, were fabricated by sputtering and thermal evaporation methods. Their hydrogen sensing properties were then investigated. The structural characterizations showed that the SnO2 in these nanomaterials was tetragonal. The surface-to-volume ratio of the nanofilms, nanorods, and nanowires increased, leading to an increase in the effective surface area. Gas sensors based on these SnO2 nanomaterials showed a reversible response to hydrogen at various concentrations. The response order of the nanofilms, nanorods and nanowires was enhanced while the peak operating temperature was decreased from 250 to 150 degrees C, and the response or recovery time became shorter. The results indicated that the sensor response effectively increased as the effective surface area of the SnO2 nanomaterials increased, demonstrating that gas-sensing properties could be significantly improved by changing the nanomaterial morphology. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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