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Polymer g-C3N4 wrapping bundle-like ZnO nanorod heterostructures with enhanced gas sensing properties

Published online by Cambridge University Press:  27 February 2018

Liwei Wang
Affiliation:
School of Marine Sciences, Guangxi University, Nanning 530004, China; Coral Reef Research Center of China, Guangxi University, Nanning 530004, China; and Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning 530003, China
Hongjie Liu
Affiliation:
Department of Science and Technology, Shiyuan College of Guangxi Teachers Education University, Nanning 530226, China
Hao Fu*
Affiliation:
School of Marine Sciences, Guangxi University, Nanning 530004, China
Yinghui Wang*
Affiliation:
School of Marine Sciences, Guangxi University, Nanning 530004, China; Coral Reef Research Center of China, Guangxi University, Nanning 530004, China; and Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning 530003, China
Kefu Yu*
Affiliation:
School of Marine Sciences, Guangxi University, Nanning 530004, China; Coral Reef Research Center of China, Guangxi University, Nanning 530004, China; and Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning 530003, China
Shaopeng Wang
Affiliation:
School of Marine Sciences, Guangxi University, Nanning 530004, China; Coral Reef Research Center of China, Guangxi University, Nanning 530004, China; and Guangxi Laboratory on the Study of Coral Reefs in the South China Sea, Nanning 530003, China
*
a)Address all correspondence to these authors. e-mail: [email protected]
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Abstract

The ZnO/g-C3N4 binary heterostructures were formed by two steps, then the firm connection between ZnO NRs and lamellar g-C3N4 was characterized through powder XRD, FESEM with EDS, TEM, XPS, and Thermogravimetric analysis. Then the gas sensing performances of ZnO/g-C3N4 nanoheterostructures were analyzed systematically by using ethanol as a molecular probe. The results revealed that the fabricated compositive sensor not only exhibited quick response/recovery characteristics in the whole operating temperature (OT) range of 200–300 °C but also got a maximum response of 14.29 toward 100 ppm of ethanol at the optimal OT of only 260 °C. Moreover, such heterostructures also demonstrated good selectivity and superb reproducibility to acetone among all the tested toxic gases, especially higher response and faster response–recovery speeds than the pristine ZnO sensor. The above ZnO/g-C3N4 heterostructures may also supply other novel applications in the aspects of lithium-ion batteries, photocatalysis, optical devices, and so on.

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Article
Copyright
Copyright © Materials Research Society 2018 

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Footnotes

Contributing Editor: Chongmin Wang

References

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