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Issue 98, 2015
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Hexagonal ZnO nanorings: synthesis, formation mechanism and trimethylamine sensing properties

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Abstract

A one-step hydrothermal method assisted by polyvinylpyrrolidone (PVP) and polyvinyl alcohol (PVA) was developed to synthesize hexagonal ZnO nanorings. X-ray diffractometry (XRD) and scanning electron microscopy (SEM) were used to characterize the as as-prepared ZnO nanorings and deduce the possible formation mechanism. The as-prepared ZnO nanorings showed the well-defined hexagonal shape with a width of 0.75–1.4 μm, a thickness of 0.17–0.33 μm and a hollow size of 0.2–1 μm. The trimethylamine (TMA) sensing performance of the hexagonal ZnO nanorings was tested. The results indicated that the hexagonal ZnO nanorings showed a high response (47 to 100 ppm TMA), fast response/recovery rate (less than 23 s and 37 s, respectively), wide linearity in a relatively wide range (1–200 ppm TMA), low detectable TMA minimum concentration (less than 5 ppm) and good selectivity to TMA. In addition, the TMA-sensing mechanism of the hexagonal ZnO nanorings was also discussed.

Graphical abstract: Hexagonal ZnO nanorings: synthesis, formation mechanism and trimethylamine sensing properties

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Article information


Submitted
26 Jul 2015
Accepted
17 Sep 2015
First published
17 Sep 2015

RSC Adv., 2015,5, 80561-80567
Article type
Paper
Author version available

Hexagonal ZnO nanorings: synthesis, formation mechanism and trimethylamine sensing properties

C. Li, Y. Lin, F. Li, L. Zhu, D. Sun, L. Shen, Y. Chen and S. Ruan, RSC Adv., 2015, 5, 80561
DOI: 10.1039/C5RA14793J

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