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Synthesis of hierarchical Co3O4@NiO core-shell nanotubes with a synergistic catalytic activity for peroxidase mimicking and colorimetric detection of dopamine
- Source :
- Talanta. 181:431-439
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- 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.
- Subjects :
- Detection limit
Chemistry
Non-blocking I/O
Nanoparticle
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
Redox
Electrospinning
0104 chemical sciences
Analytical Chemistry
Catalysis
law.invention
Chemical engineering
law
Calcination
0210 nano-technology
Selectivity
Subjects
Details
- ISSN :
- 00399140
- Volume :
- 181
- Database :
- OpenAIRE
- Journal :
- Talanta
- Accession number :
- edsair.doi...........63c67e306fa38648d6fe9687bc2ca106