Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 769, Issue -, Pages 521-531Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2018.08.035
Keywords
Hierarchical architecture; TiO2; Phase composition; SnO2; Sensor
Categories
Funding
- National Natural Science Foundation of China [51572109, 51772130]
- Graduate Innovation Foundation of University of Jinan [GIFUJN YCXB15002]
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TiO2 hollow hierarchical architectures with anatase and rutile phases are fabricated. The hierarchical structure uniformly decorated with SnO2 nanoparticles endows a fascinating sensing performance for detecting triethylamine (TEA). Hierarchical structure provides a close connection between anatase/rutile TiO2 and SnO2, which is in favor of efficient electrons transfer. It is found that TiO2@SnO2 as a novel sensing material has high response at low level of TEA and rapid responding speed in comparison with individual TiO2 components. In the case of 5 ppm TEA gas under the operation temperature of 240 degrees C, the response value of TiO2@SnO2 sample is up to 21.6, which is three times higher than that of TiO2 sample. The responding speed of TiO2@SnO2 sensors elevates 28% in comparison with TiO2. This result is utilizable for developing the high efficiency gas sensors using hollow hierarchical architecture. (C) 2018 Elsevier B.V. All rights reserved.
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