Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 266, Issue -, Pages 692-702Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2018.03.055
Keywords
ZnO-SnO2 nanofibers; NO2 sensor; n-njunction
Funding
- National Natural Science Foundation of China [51772015, 21572015]
- State Key Laboratory of Chemical Resource Engineering
- Beijing Engineering Center for Hierarchical Catalysts
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One dimensional ZnO-SnO2 hollow nanofibers were synthesized via a one-step electrospinning method and annealing treatment. The morphology and structure of the nanofibers have been characterized by various analysis methods, and the sensing properties to 0.5-5 ppm NO2 have also been examined. The results reveal that the 20 atm%Zn composite not only exhibits the highest response that is 9 and 5.2 times higher than that of pristine ZnO and SnO2 respectively, but also exhibits rapid response, excellent selectivity and stability at low operating temperature of 90 degrees C. So, herein synthesized composite is a promising sensing material for detection of NO2. The enhancing sensing mechanism is discussed in detail, which is attributed to the unique one-dimensional hollow nanostructures and the formation of heterojunctions at interface between both metal oxides. (C) 2018 Published by Elsevier B.V.
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