非阻塞I/O
化学
催化作用
煅烧
纳米技术
化学工程
纳米材料
纳米管
纳米颗粒
复合数
碳纳米管
材料科学
有机化学
复合材料
工程类
作者
Yun Zhu,Zezhou Yang,Maoqiang Chi,Meixuan Li,Ce Wang,Xiaofeng Lu
出处
期刊:Talanta
[Elsevier]
日期:2018-05-01
卷期号:181: 431-439
被引量:77
标识
DOI:10.1016/j.talanta.2018.01.019
摘要
Fabrication of core-shell nanostructured catalyst is a promising way for tuning its catalytic performance due to the highly active interface and rich redox properties. In this work, hierarchical Co3O4@NiO core-shell nanotubes are fabricated by the deposition of NiO shells via a chemical bath treatment using electrospun Co-C composite nanofibers as templates, followed by a calcination process in air. The as-prepared Co3O4@NiO core-shell nanotubes exhibit a uniform and novel hollow structure with Co3O4 nanoparticles attached to the inner wall of NiO nanotubes and excellent catalytic activity toward the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of H2O2. Due to the synergistic effect, the peroxidase-like activity of the Co3O4@NiO core-shell nanotubes is much higher than that of individual Co3O4 and NiO components. Owing to the superior peroxidase-like activity, a simple and rapid colorimetric approach for the detection of dopamine with a detection limit of 1.21µM and excellent selectivity has been developed. It is anticipated that the prepared Co3O4@NiO core-shell nanotubes are promising materials applied for biomedical analysis and environmental monitoring.
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