Electrochemical detection of volatile organic compounds using a Na 3Zr2Si2PO12/Bi2Cu 0.1V0.9O5.35 heterojunction device

Tetsuya Kida, Naoki Morinaga, Shotaro Kishi, Ki Mun An, Kyoung Won Sim, Bu Young Chae, Jung Kwan Kim, Bong Ki Ryu, Kengo Shimanoe

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

A fast sodium ion conductor, NASICON (Na3Zr2Si 2PO12), has been widely used for gas sensor applications. In this study, we demonstrate that a device combining NASICON with an oxygen-ion conductor of BiCuVOx (Bi2Cu0.1V0.9O 5.35) can electrochemically detect volatile organic compounds (VOCs), such as ethanol, formaldehyde, and toluene. The sensing electrode made of BiCuVOx was attached onto a sintered NASICON disk at high temperature to produce an interfacial layer that had a different morphology and composition from those of NASICON and BiCuVOx, as observed by scanning electron microscopy-energy dispersive X-ray spectroscopy analysis. The device in which NASICON was fitted with the BiCuVOx-based electrode was found to efficiently detect VOCs in ppm concentrations. The sensor signal (electromotive force) exceeded 100 mV in response to 10 ppm HCOH at 400 °C, demonstrating the high sensitivity of the device. It also exhibited a relatively quick response, reproducible and stable sensor signals, and high selectivity to VOCs. The sensor responses followed behavior typical for mixed-potential-type gas sensors based on oxygen-ion conductors. It was thus suggested that the electrochemical oxidation of VOCs with oxide ions took place at the interfacial oxygen ion-conductive layer that was formed by the reaction of NASICON with BiCuVOx.

Original languageEnglish
Pages (from-to)7484-7490
Number of pages7
JournalElectrochimica Acta
Volume56
Issue number22
DOIs
Publication statusPublished - Sep 1 2011

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Volatile Organic Compounds
Volatile organic compounds
Heterojunctions
Ions
Oxygen
Chemical sensors
Sensors
Electromotive force
Electrodes
Electrochemical oxidation
Toluene
Formaldehyde
Oxides
Ethanol
Sodium
Scanning electron microscopy
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

Cite this

Electrochemical detection of volatile organic compounds using a Na 3Zr2Si2PO12/Bi2Cu 0.1V0.9O5.35 heterojunction device. / Kida, Tetsuya; Morinaga, Naoki; Kishi, Shotaro; An, Ki Mun; Sim, Kyoung Won; Chae, Bu Young; Kim, Jung Kwan; Ryu, Bong Ki; Shimanoe, Kengo.

In: Electrochimica Acta, Vol. 56, No. 22, 01.09.2011, p. 7484-7490.

Research output: Contribution to journalArticle

Kida, Tetsuya ; Morinaga, Naoki ; Kishi, Shotaro ; An, Ki Mun ; Sim, Kyoung Won ; Chae, Bu Young ; Kim, Jung Kwan ; Ryu, Bong Ki ; Shimanoe, Kengo. / Electrochemical detection of volatile organic compounds using a Na 3Zr2Si2PO12/Bi2Cu 0.1V0.9O5.35 heterojunction device. In: Electrochimica Acta. 2011 ; Vol. 56, No. 22. pp. 7484-7490.
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