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Proceedings Paper

Novel electrode systems for amperometric sensing: the case of titanium
Author(s): F. Terzi; L. Pigani; C. Zanardi; B. Zanfrognini; S. Ruggeri; G. Maccaferri; R. Seeber
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Paper Abstract

After working for years on organic materials, e.g., polythiophenes and relevant composites with metal nanoparticles, we shifted our attention to unusual metals, chosen as candidates to effective amperometric sensing on the basis of the atomic structure and crystalline properties. The present contribution aims at proposing an electrode material rarely employed in electroanalysis, namely Ti. We have experimented that the peculiar nature of Ti leads to electrochemical behavior quite different with respect to the conventional electrode materials, including those based on TiO2 (nano)particles. Our work focuses on the determination of strong oxidizing species, namely H2O2 and HClO, and noble metal ions, namely Au(III). Strong oxidizing species are commodity chemicals employed in a number of different industrial processes, in which usually high concentration levels should be monitored. The procedures proposed have been successfully applied also in complex matrices, such as detergent samples. As to Au(III) determination, it also constitutes a crucial tool in order to increase the efficiency of hydrometallurgic processes and of the recovery of precious materials from electronic waste. Ti electrodes allow the determination of dissolved Au species in the presence of other metal ions. In any cases the electrodes exhibit reproducible and repeatable electrochemical responses, even in the presence of high concentration of organic fouling species typical of bio-sorption processes.

Paper Details

Date Published: 4 November 2014
PDF: 9 pages
Proc. SPIE 9253, Optics and Photonics for Counterterrorism, Crime Fighting, and Defence X; and Optical Materials and Biomaterials in Security and Defence Systems Technology XI, 925313 (4 November 2014); doi: 10.1117/12.2073843
Show Author Affiliations
F. Terzi, DELPROSENS srl (Italy)
L. Pigani, Univ. degli Studi di Modena e Reggio Emilia (Italy)
C. Zanardi, Univ. degli Studi di Modena e Reggio Emilia (Italy)
B. Zanfrognini, DELPROSENS srl (Italy)
S. Ruggeri, DELPROSENS srl (Italy)
G. Maccaferri, Univ. degli Studi di Modena e Reggio Emilia (Italy)
R. Seeber, Univ. degli Studi di Modena e Reggio Emilia (Italy)


Published in SPIE Proceedings Vol. 9253:
Optics and Photonics for Counterterrorism, Crime Fighting, and Defence X; and Optical Materials and Biomaterials in Security and Defence Systems Technology XI
Roberto Zamboni; Douglas Burgess; Gari Owen; François Kajzar; Attila A. Szep; Harbinder Rana, Editor(s)

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