Journal
ELECTROCHIMICA ACTA
Volume 56, Issue 22, Pages 7615-7621Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2011.06.077
Keywords
Bi sensor; Electrodeposition; Complex agent; Linear sweep voltammetry; Square-wave anodic stripping voltammetry
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Funding
- National Science Council of ROC, Taiwan
- NTHU
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The influences of citric acid (CA), ethylenediaminetetraacetic acid (EDTA), polyethylene glycol (PEG), and gelatin on the deposition behavior of Bi were systematically investigated through the linear sweep voltammetric (LSV) analysis. Based on the LSV results, deposits plated from a typical solution containing 0.05 M Bi(NO3)(3)center dot 5H(2)O and various combinations of complex agents and additives with pH = 3.5 at 1 and 30 mA cm(-2) were characterized by scanning electron microscopic (SEM) and X-ray diffraction (XRD) analyses. The adhesion of deposits and the formation of dendrites were respectively improved and inhibited by the adsorption of PEG onto Bi deposits. With adding the above four compounds, a synergistic effect was shown to reach a nano-sized, sphere-like, porous morphology of a Bi deposit at 30 mA cm(-2). The crystal size and morphology of Bi deposits were found to affect the sensing ability of Sn2+ through the square-wave anodic stripping voltammetric (SWASV) analysis. (C) 2011 Elsevier Ltd. All rights reserved.
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