Fe and Co-doped (Ba, Ca)TiO<sub>3</sub> Perovskite as Potential Electrocatalysts for Glutamate Sensing

  • Nicha Sato Kasetsart University
  • Makito Haruta Nara Institute of Science and Technology
  • Kiyotaka Sasagawa Nara Institute of Science and Technology
  • Jun Ohta Nara Institute of Science and Technology
  • Oratai Jongprateep Kasetsart University
Keywords: barium titanate, calcium titanate, doping, electrocatalysis, glutamate, electrochemical sensor

Abstract

Barium titanate (BaTiO3) and calcium titanate (CaTiO3) are renown perovskite-structured dielectric materials. Nevertheless, utilization of BaTiO3 and CaTiO3 in sensing applications has not been extensive. This study, therefore, aims at examining potential usage of BaTiO3 and CaTiO3 as enzyme-less sensors.  BaTiO3, CaTiO3, Fe-doped BaTiO3, Co-doped BaTiO3, Fe-doped BaTiO3, and Co-doped CaTiO3 (with Fe and Co 5 at%) were synthesized by solution combustion technique, compositionally and microstructurally examined, and tested for their electrocatalytic activities. All powders consisted of submicrometer-sized particles. Measurements of electrocatalytic activities in 0.01 M glutamate solution by cyclic voltammetry were performed. It was found that oxidation peaks occurred at applied voltage close to 0.6 V. Peak currents, which denoted electrocatalytic performance, were prominent in doped powders. Electrocatalytic activities of the powders were discussed with respect to chemical composition, microstructure, and electronic characteristic of the materials.

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Author Biographies

Nicha Sato

Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok, Thailand

Makito Haruta

Division of Materials Science, Nara Institute of Science and Technology, Nara, Japan

Kiyotaka Sasagawa

Division of Materials Science, Nara Institute of Science and Technology, Nara, Japan

Jun Ohta

Division of Materials Science, Nara Institute of Science and Technology, Nara, Japan

Oratai Jongprateep

Department of Materials Engineering, Faculty of Engineering, Kasetsart University, Bangkok, Thailand

Materials Innovation Center, Faculty of Engineering, Kasetsart University, Bangkok, Thailand

Published In
Vol 23 No 6, Nov 30, 2019
How to Cite
[1]
N. Sato, M. Haruta, K. Sasagawa, J. Ohta, and O. Jongprateep, “Fe and Co-doped (Ba, Ca)TiO<sub>3</sub&gt; Perovskite as Potential Electrocatalysts for Glutamate Sensing”, Eng. J., vol. 23, no. 6, pp. 265-278, Nov. 2019.