Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 10, Issue 12, Pages 1893-1896Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2008.09.037
Keywords
Highly ordered platinum-nanotube array; Arsenic; Voltammetry; Porous anodic alumina template; Heavy metals
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Funding
- Science and Technology Commission of Shanghai Municipality, China [06dz05824]
- Shanghai Entry-Exit Inspection and Quarantine Bureau of PRC
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A novel method for the oxidative determination of trace arsenic(III) was investigated on highly ordered platinum-nanotube array electrodes (PtNTAEs). The PtNTAEs with a highly organized structure were fabricated by electrochemical deposition of platinum in a 3-aminopropyltrimethoxysilane-modified porous anodic alumina template (PAA). The morphologies and structures of PtNTAEs were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). Electrochemical experiments proved that the PtNTAEs exhibited better performance for As(III) analysis in comparison with platinum nanoparticles-coated GCE (Pt-nano/GCE) or Pt foil electrode. The PtNTAEs showed to provide higher reproducibility and lower detection limit. The relative standard deviation (RSD) was 3.5% for 50 repeated measurements of 20 mu M As(III), and the limit of detection (LOD) was 0.1 ppb, which was typically 1-2 orders of magnitude lower than that of Ptnano/GCE or Pt foil electrode. (C) 2008 Elsevier B.V. All rights reserved.
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