Use of a titanium nitride for electrochemical inactivation of marine bacteria

Tsuruo Nakayama; Hitoshi Wake; Kinichi Ozawa; Hidetoshi Kodama; Noriyuki Nakamura; Tadashi Matsunaga

doi:10.1021/es970578h

Use of a titanium nitride for electrochemical inactivation of marine bacteria

Tsuruo Nakayama, Hitoshi Wake, Kinichi Ozawa, Hidetoshi Kodama, Noriyuki Nakamura, Tadashi Matsunaga^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

63 Citations (Scopus)

Abstract

A titanium nitride (TIN) electrode with very low resistance and good electrochemical stability was constructed and used for electrochemical inactivation of the marine Gram-negative bacterium Vibrio alginolyticus. Specific resistance of the TiN electrode, which was formed by reactive sputtering, was 1.1 x 10^-4 Ω·cm. When cyclic voltammetry of the TiN electrode-attached V. alginolyticus cells of 4.2 x 10⁵ cells/cm² was carried out at a scan rate of 20 mV/s in seawater, an anodic peak current appeared around 0.68 V vs Ag/AgCl. In all, 98.7% of V. alginolyticus cells attached onto the electrode were inactivated by applying a potential of 0.8 V vs Ag/AgCl in seawater for 30 min. Changes in pH and chlorine concentration were not observed at 0.8 V vs Ag/AgCl. The TiN electrode was oxidized by applying potential of a 0.8 V vs Ag/AgCl and passivated by formation of TiO(2) onto the electrode surface. The TiO(2) thin layer formed on the TiN electrode surface did not impede electrochemical inactivation of marine bacteria. These results show that the TiN electrode can be used as an electrode for electrochemical inactivation of marine bacteria.

Original language	English
Pages (from-to)	798-801
Number of pages	4
Journal	Environmental Science and Technology
Volume	32
Issue number	6
DOIs	https://doi.org/10.1021/es970578h
Publication status	Published - 1998 Mar 15
Externally published	Yes

ASJC Scopus subject areas

Chemistry(all)
Environmental Chemistry

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title = "Use of a titanium nitride for electrochemical inactivation of marine bacteria",

abstract = "A titanium nitride (TIN) electrode with very low resistance and good electrochemical stability was constructed and used for electrochemical inactivation of the marine Gram-negative bacterium Vibrio alginolyticus. Specific resistance of the TiN electrode, which was formed by reactive sputtering, was 1.1 x 10-4 Ω·cm. When cyclic voltammetry of the TiN electrode-attached V. alginolyticus cells of 4.2 x 105 cells/cm2 was carried out at a scan rate of 20 mV/s in seawater, an anodic peak current appeared around 0.68 V vs Ag/AgCl. In all, 98.7% of V. alginolyticus cells attached onto the electrode were inactivated by applying a potential of 0.8 V vs Ag/AgCl in seawater for 30 min. Changes in pH and chlorine concentration were not observed at 0.8 V vs Ag/AgCl. The TiN electrode was oxidized by applying potential of a 0.8 V vs Ag/AgCl and passivated by formation of TiO(2) onto the electrode surface. The TiO(2) thin layer formed on the TiN electrode surface did not impede electrochemical inactivation of marine bacteria. These results show that the TiN electrode can be used as an electrode for electrochemical inactivation of marine bacteria.",

author = "Tsuruo Nakayama and Hitoshi Wake and Kinichi Ozawa and Hidetoshi Kodama and Noriyuki Nakamura and Tadashi Matsunaga",

year = "1998",

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T1 - Use of a titanium nitride for electrochemical inactivation of marine bacteria

AU - Nakayama, Tsuruo

AU - Wake, Hitoshi

AU - Ozawa, Kinichi

AU - Kodama, Hidetoshi

AU - Nakamura, Noriyuki

AU - Matsunaga, Tadashi

PY - 1998/3/15

Y1 - 1998/3/15

N2 - A titanium nitride (TIN) electrode with very low resistance and good electrochemical stability was constructed and used for electrochemical inactivation of the marine Gram-negative bacterium Vibrio alginolyticus. Specific resistance of the TiN electrode, which was formed by reactive sputtering, was 1.1 x 10-4 Ω·cm. When cyclic voltammetry of the TiN electrode-attached V. alginolyticus cells of 4.2 x 105 cells/cm2 was carried out at a scan rate of 20 mV/s in seawater, an anodic peak current appeared around 0.68 V vs Ag/AgCl. In all, 98.7% of V. alginolyticus cells attached onto the electrode were inactivated by applying a potential of 0.8 V vs Ag/AgCl in seawater for 30 min. Changes in pH and chlorine concentration were not observed at 0.8 V vs Ag/AgCl. The TiN electrode was oxidized by applying potential of a 0.8 V vs Ag/AgCl and passivated by formation of TiO(2) onto the electrode surface. The TiO(2) thin layer formed on the TiN electrode surface did not impede electrochemical inactivation of marine bacteria. These results show that the TiN electrode can be used as an electrode for electrochemical inactivation of marine bacteria.

AB - A titanium nitride (TIN) electrode with very low resistance and good electrochemical stability was constructed and used for electrochemical inactivation of the marine Gram-negative bacterium Vibrio alginolyticus. Specific resistance of the TiN electrode, which was formed by reactive sputtering, was 1.1 x 10-4 Ω·cm. When cyclic voltammetry of the TiN electrode-attached V. alginolyticus cells of 4.2 x 105 cells/cm2 was carried out at a scan rate of 20 mV/s in seawater, an anodic peak current appeared around 0.68 V vs Ag/AgCl. In all, 98.7% of V. alginolyticus cells attached onto the electrode were inactivated by applying a potential of 0.8 V vs Ag/AgCl in seawater for 30 min. Changes in pH and chlorine concentration were not observed at 0.8 V vs Ag/AgCl. The TiN electrode was oxidized by applying potential of a 0.8 V vs Ag/AgCl and passivated by formation of TiO(2) onto the electrode surface. The TiO(2) thin layer formed on the TiN electrode surface did not impede electrochemical inactivation of marine bacteria. These results show that the TiN electrode can be used as an electrode for electrochemical inactivation of marine bacteria.

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Use of a titanium nitride for electrochemical inactivation of marine bacteria

Abstract

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