371258 Electrospun Composite Nanofibers for Highly Selective Propane Detection at High Temperature Based on Its Rapid Reaction Kinetics

Monday, November 17, 2014: 9:00 AM
408 (Hilton Atlanta)
Yixin Liu, University of Connecticut, Storrs, CT and Yu Lei, Chemical & Biomolecular Engineering, University of Connecticut, Storrs, CT

Metal oxide composite nanofibers (NFs) were successfully prepared by electrospinning and a subsequent calcination process. The morphology, composition and crystal structure of the as-prepared nanofibers were detailed characterized. The as-prepared nanofibers possess an average diameter of 89 ± 10 nm. The gas sensing performance of the as-prepared nanofibers towards CO, CH4 and C3H8 was investigated at 800 oC, which shows an excellent sensitivity and selectivity towards C3H8. The sensing mechanism of the enhanced selectivity for C3H8 is proposed. Different reaction kinetics of different reducing gases on the as-prepared nanofibers and the response offset effect of n-type metal oxide and p-type metal oxide in the composite nanofibers are ascribed to be responsible for the excellent selectivity to C3H8 over CO and CH4 under the tested conditions.

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