Journal article
One-step electrochemical deposition of Prussian Blue-multiwalled carbon nanotube nanocomposite thin-film: preparation, characterization and evaluation for H2O2 sensing
Journal of materials chemistry, Vol.20(8), pp.1532-1537
01/01/2010
Abstract
Prussian Blue-multiwalled carbon nanotube-modified gold (PB-MWCNT/Au) electrodes were successfully fabricated using the electrochemical co-deposition method in which the MWCNTs not only act as a carrier of PB, but also as a modifier for a catalytic function. Fourier transform infrared spectra proved that PB assembled on the surface of MWCNTs through electrochemical co-deposition. Scanning electron microscopy images showed that a relatively porous PB-MWCNT film was formed. Cyclic voltammetry and electrochemical impedance spectroscopy revealed that a PB-coated MWCNTs composite film improved electron and ion transfer relative to pure PB films and also exhibited larger electrode-specific capacitance than PB alone. Compared with a PB film, the PB-MWCNT composite film showed a larger response current to the reduction of H2O2 because of the synergistic effects between the MWCNTs and PB particles. This fast, sensitive, and efficient sensor for H2O2 was observed with a detection sensitivity of 856 mu A mM(-1) cm(-2), and the linear range spanned the concentration of H2O2 from 1 mM to 5 mM. The detection limit was 23 nM at a signal-to-noise ratio of 3. The method presented here demonstrates the great potential for CNTs and other inorganic or metal nanoparticles for constructing bioelectronic devices and biosensors.
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Details
- Title
- One-step electrochemical deposition of Prussian Blue-multiwalled carbon nanotube nanocomposite thin-film: preparation, characterization and evaluation for H2O2 sensing
- Creators
- Dan Du - Pacific Northwest National LaboratoryMinghui Wang - Central China Normal UniversityYuehua Qin - Central China Normal UniversityYuehe Lin - Pacific Northwest National Laboratory
- Publication Details
- Journal of materials chemistry, Vol.20(8), pp.1532-1537
- Academic Unit
- School of Mechanical and Materials Engineering
- Publisher
- Royal Soc Chemistry
- Number of pages
- 6
- Grant note
- 20705010 / Natural Science Foundation of China; National Natural Science Foundation of China (NSFC) 20070511015 / Research Fund for the Doctoral Program of Higher Education of China; Research Fund for the Doctoral Program of Higher Education of China (RFDP); Specialized Research Fund for the Doctoral Program of Higher Education (SRFDP) Pacific Northwest National Laboratory (PNNL)
- Identifiers
- 99901227639301842
- Language
- English
- Resource Type
- Journal article