Hybrid structure of zinc oxide nanorods and three dimensional graphene foam for supercapacitor and electrochemical sensor applications

A hybrid structure of zinc oxide (ZnO) on three dimensional (3D) graphene foam has been synthesized by chemical vapor deposition (CVD) growth of graphene followed by a facial in situ precipitation of ZnO nanorods under hydrothermal conditions. Scanning electron microscopy (SEM) and X-ray diffraction...

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Main Authors: Dong, Xiaochen, Cao, Yunfa, Wang, Jing, Chan-Park, Mary B., Wang, Lianhui, Huang, Wei, Chen, Peng
Other Authors: School of Chemical and Biomedical Engineering
Format: Article
Language:English
Published: 2013
Online Access:https://hdl.handle.net/10356/99657
http://hdl.handle.net/10220/10572
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-996572020-03-07T11:40:19Z Hybrid structure of zinc oxide nanorods and three dimensional graphene foam for supercapacitor and electrochemical sensor applications Dong, Xiaochen Cao, Yunfa Wang, Jing Chan-Park, Mary B. Wang, Lianhui Huang, Wei Chen, Peng School of Chemical and Biomedical Engineering A hybrid structure of zinc oxide (ZnO) on three dimensional (3D) graphene foam has been synthesized by chemical vapor deposition (CVD) growth of graphene followed by a facial in situ precipitation of ZnO nanorods under hydrothermal conditions. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) are used to characterize the morphology and structure of graphene/ZnO hybrids. The results show that the ZnO nanorods have high crystallinity and cluster uniformly on graphene skeleton to form flower-like nanostructures. Serving as a free-standing electrode, the electrochemical and biosensing performance of graphene/ZnO hybrids are studied by cyclic voltammetry, electrochemical impedance spectroscopy, galvanostatic charge–discharge and amperometric measurements. It is found that the graphene/ZnO hybrids display superior capacitive performance with high specific capacitance (~400 F g−1) as well as excellent cycle life, making them suitable for high-performance energy storage applications. Furthermore, the graphene/ZnO hybrids exhibit high sensitivity for detection of [Fe(CN)6]3+ and dopamine, with the extrapolated lower detection limits of ~1.0 μM and ~10.0 nM respectively. These results demonstrate the potential of free-standing graphene/ZnO hybrid electrodes for the development of highly sensitive electrochemical sensors. 2013-06-25T02:03:17Z 2019-12-06T20:09:55Z 2013-06-25T02:03:17Z 2019-12-06T20:09:55Z 2012 2012 Journal Article Dong, X., Cao, Y., Wang, J., Chan-Park, M. B., Wang, L., Huang, W., et al. (2012). Hybrid structure of zinc oxide nanorods and three dimensional graphene foam for supercapacitor and electrochemical sensor applications. RSC Advances, 2(10), 4364-4369. 2046-2069 https://hdl.handle.net/10356/99657 http://hdl.handle.net/10220/10572 10.1039/c2ra01295b en RSC advances © 2012 The Royal Society of Chemistry.
institution Nanyang Technological University
building NTU Library
country Singapore
collection DR-NTU
language English
description A hybrid structure of zinc oxide (ZnO) on three dimensional (3D) graphene foam has been synthesized by chemical vapor deposition (CVD) growth of graphene followed by a facial in situ precipitation of ZnO nanorods under hydrothermal conditions. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) are used to characterize the morphology and structure of graphene/ZnO hybrids. The results show that the ZnO nanorods have high crystallinity and cluster uniformly on graphene skeleton to form flower-like nanostructures. Serving as a free-standing electrode, the electrochemical and biosensing performance of graphene/ZnO hybrids are studied by cyclic voltammetry, electrochemical impedance spectroscopy, galvanostatic charge–discharge and amperometric measurements. It is found that the graphene/ZnO hybrids display superior capacitive performance with high specific capacitance (~400 F g−1) as well as excellent cycle life, making them suitable for high-performance energy storage applications. Furthermore, the graphene/ZnO hybrids exhibit high sensitivity for detection of [Fe(CN)6]3+ and dopamine, with the extrapolated lower detection limits of ~1.0 μM and ~10.0 nM respectively. These results demonstrate the potential of free-standing graphene/ZnO hybrid electrodes for the development of highly sensitive electrochemical sensors.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Dong, Xiaochen
Cao, Yunfa
Wang, Jing
Chan-Park, Mary B.
Wang, Lianhui
Huang, Wei
Chen, Peng
format Article
author Dong, Xiaochen
Cao, Yunfa
Wang, Jing
Chan-Park, Mary B.
Wang, Lianhui
Huang, Wei
Chen, Peng
spellingShingle Dong, Xiaochen
Cao, Yunfa
Wang, Jing
Chan-Park, Mary B.
Wang, Lianhui
Huang, Wei
Chen, Peng
Hybrid structure of zinc oxide nanorods and three dimensional graphene foam for supercapacitor and electrochemical sensor applications
author_sort Dong, Xiaochen
title Hybrid structure of zinc oxide nanorods and three dimensional graphene foam for supercapacitor and electrochemical sensor applications
title_short Hybrid structure of zinc oxide nanorods and three dimensional graphene foam for supercapacitor and electrochemical sensor applications
title_full Hybrid structure of zinc oxide nanorods and three dimensional graphene foam for supercapacitor and electrochemical sensor applications
title_fullStr Hybrid structure of zinc oxide nanorods and three dimensional graphene foam for supercapacitor and electrochemical sensor applications
title_full_unstemmed Hybrid structure of zinc oxide nanorods and three dimensional graphene foam for supercapacitor and electrochemical sensor applications
title_sort hybrid structure of zinc oxide nanorods and three dimensional graphene foam for supercapacitor and electrochemical sensor applications
publishDate 2013
url https://hdl.handle.net/10356/99657
http://hdl.handle.net/10220/10572
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