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 |
卷 | 22 |
期 | 33 |
DOI | |
出版状态 | 已出版 - 7 9月 2012 |
已对外发布 | 是 |