Journal
SENSORS AND ACTUATORS B-CHEMICAL
Volume 251, Issue -, Pages 27-33Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2017.04.114
Keywords
ZnO/ZnFe2O4; Hollow nanocages; Metal organic framework; Gas sensors; Acetone
Funding
- National Natural Science Foundation of China [51672109, 21505050]
- Natural Science Foundation of Shandong Province [ZR2016JL015]
- China Postdoctoral Science Foundation [2016M592123]
- Higher Education Institutions of Shandong Province [J15LJ06]
- Science Foundation for Doctorate Research from the University of Jinan [XBS1525]
- Science Foundation for Post Doctorate Research from the University of Jinan [XBH1506]
- Science Foundation of Jinan University [XKY1521]
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ZnO/ZnFe2O4 hollow nanocages have been designed and synthesized through a metal organic frameworks route, which involves two steps including the synthesis of Fe(III)MOF-5 nanostructured cages precursors and the subsequent transformation to ZnO/ZnFe2O4 hollow nanocages by thermal annealing in air. The ZnO/ZnFe2O4 architecture is constructed by hollow nanocages with the scale around 100 nm. To demonstrate its functional properties, the as-prepared products are utilized as sensing material for gas sensor. Significantly, the ZnO/ZnFe2O4 hollow nanocages exhibit enhanced response to acetone (25.8) with the detection limit of 1 ppm at an optimum temperature of 290 degrees C toward its two individual compositions (ZnO nanocages (7.9) and ZnFe2O4 nanospheres (8.1)). Moreover, the response of the ZnO/ZnFe2O4 nanocages is even larger than that of other architectures, which follows the order hollow nanocages > double shell > hollow microsphere > hybrid hollow sphere > nanoparticle with rod. The remarkable gas sensing performance enhancement of ZnO/ZnFe2O4 nanocages can be attributed to the unique porous and hollow structure, heterojunction and high response/surface area ratio. (C) 2017 Elsevier B.V. All rights reserved.
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