Preparation of Perovskite-Type Oxide Thick-Film Device by EPD Method and its Application for Electrochemical Hydrogen-Phosphate Ion Sensor

Abstract:

Perovskite-type oxide (LaCoO₃) fine powders were prepared by a polymer precursors (PP) methods at 300~500°C. The LaCoO₃ fine powder could be prepared at 380°C when the use of EDA and PEG for organic-and polymer-additives, respectively. The surface area of LCO was ca. 39m²/g. LCO thick-film could be prepared from the steady state suspension with the addition of AcAc or PVAby the EPD method at +10V, 3min.The current density of the LaCoO₃ film sensor was changed with changing HPO₄^2- concentration at +1.00 V vs. SCE. The device showed relatively good amperometoric response to H₂PO₄^- from 1.0x10^-5M to 1.0x10^-3M with the 90% response time of ca 2min. The LaCoO₃-based sensor also showed a good selectivity among the examined anions of NO₃^-, Cl^- and SCN^-.

• Periodical: Key Engineering Materials (Volume 507)
• Pages: 215-219
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.507.215
• Online since: March 2012
• Authors: Toru Inagaki, Toshikazu Matsumoto, Satoko Takase, Youichi Shimizu
• Keywords: EPD, Perovskite-Type Oxide, Phosphate Ion Sensor, Thick Film

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