Synthesis of graphene-carbon nanotube hybrid foam and its use as a novel three-dimensional electrode for electrochemical sensing

Xiaochen Dong, Yanwen Ma, Guoyin Zhu, Yinxi Huang, Jing Wang, Mary B. Chan-Park, Lianhui Wang, Wei Huang, Peng Chen

科研成果: 期刊稿件文章同行评审

212 引用 (Scopus)

摘要

Three-dimensional (3D) graphene-carbon nanotube (CNT) hybrids are synthesized by two-step chemical vapor deposition (CVD) under atmospheric pressure. As revealed by scanning electron microscopy (SEM), the hybrid is a monolithic graphene foam with conformal coverage of a dense CNT mesh. We further demonstrate that the obtained graphene-CNT hybrid foams can be used as novel 3D electrochemical electrodes for sensing applications. Specifically, the 3D graphene-CNT electrodes exhibit a high sensitivity (∼470.7 mA M -1 cm -2) and low detection limit (∼20 nM with S/N ≈ 9.2) for dopamine detection. Modified with horseradish peroxidase and Nafion, the 3D hybrid electrodes are also used to detect H 2O 2 with a high sensitivity (137.9 mA M -1 cm -2), low detection limit (∼1 μM with S/N ≈ 17.4), and wide linear detection range (10 μM-1 mM).

源语言英语
页(从-至)17044-17048
页数5
期刊Journal of Materials Chemistry
22
33
DOI
出版状态已出版 - 7 9月 2012
已对外发布

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