Self-assembly of Zn2SnO4 hollow microcubes and enhanced gas-sensing performances

Uniform Zn2SnO4 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 micr...

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Bibliographic Details
Published in:Materials letters 2016-11, Vol.182, p.264-268
Main Authors: Yang, H.M., Ma, S.Y., Jiao, H.Y., Yang, G.J., Li, W.Q., Jin, W.X., Jiang, X.H., Wang, T.T.
Format: Article
Language:English
Subjects:
Accessibility
Acetone
Annealing
Hollow microcubes
Hydrothermal
Mechanism
Nanostructure
Operating temperature
Optimization
Self assembly
Semiconductors
Sensors
Zinc stannate
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Summary:Uniform Zn2SnO4 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°C), the response of hollow microcubes sensor to 200ppm 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. •The hollow Zn2SnO4 microcubes are obtained by hydrothermal under an alkaline mineralizer.•The samples indicate excellent response to acetone at 260°C.•The hollow Zn2SnO4 microcubes exhibit fast response time (7s) and recovery time (9s).
ISSN:0167-577X
1873-4979
DOI:10.1016/j.matlet.2016.07.018