Journal
CERAMICS INTERNATIONAL
Volume 41, Issue 10, Pages 13780-13787Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2015.08.060
Keywords
Acetone; Gas sensors; In2O3; Hollow; Nanofibers
Categories
Funding
- National Natural Science Foundation of China [61473132]
- China Postdoctoral Science Foundation [2013M531672]
- Program for Science and Technology Development of Jilin Province [20130522159JH]
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In this study, indium oxide (In2O3) hollow nanofibers were synthesized through a two-step process. In2O3 solid nanofibers were prepared by electrospinning, and 10% HNO3 was used to corrode these nanofibers to obtain In2O3 hollow nanofibers. Moreover, the effects of corrosion on the morphology and acetone-sensing properties of In2O3 nanofibers were investigated. In2O3 nanofibers that were corroded for 2 h displayed hollow structures and exhibited a high response (resistance ratio) of 151 to 5 ppm of acetone at 300 degrees C. The minimum detection limit was 20 ppb. The hollow In2O3 nanofibers also exhibited high selectivity to acetone along with negligible cross-responses to interference gases at 300 degrees C, These gases include NO2, H-2, CO, benzene, p-xylene, and toluene. The strong response to acetone was attributed to the enhanced accessibility of gas for gas-sensing reactions due to the hollow morphology. (C) 2015 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
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