Journal
MATERIALS LETTERS
Volume 182, Issue -, Pages 264-268Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.matlet.2016.07.018
Keywords
Hydrothermal; Semiconductors; Mechanism; Acetone; Hollow microcubes; Sensors
Funding
- National Natural Science Foundations of China [10874140, 51562035, 51462031]
- Foundations of Northwest Normal University [NWNU-LKQN-12-11, NWNU-LKQN-13-18]
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Uniform Zn(2)Sna(4) solid and hollow microcubes are synthesized via hydrothermal method followed by an annealing process in air. The morphology and structure were characterized by SEM, TEM and XRD. In addition, a possible formation mechanism of the hollow microcubes is discussed. The hollow Zn2SnO4 microcubes were found to exhibit higher and quicker response-recovery traits than these of solid nanocubes. Under the optimum operating temperature (260 degrees C), the response of hollow microcubes sensor to 200 ppm acetone is 141.7, which is 3 times larger than that of solid nanocubes (41.9). The significant decrease in response-recovery time is attributed not only to the surface accessibility allows by the hollow architectures, but also by numerous interweaving petal-like constructs of the nanoflowers. (C) 2016 Elsevier B.V. All rights reserved.
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