Synthesis of RuO2-loaded BaTinO2n + 1 (n = 1, 2 and 5) using a polymerizable complex method and its photocatalytic activity for the decomposition of water

Yohichi Yamashita, Masaru Tada, Masato Kakihana, Minoru Osada, Kiyohide Yoshida

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

A polymerizable complex (PC) technique was utilized to prepare fine powders of high purity BaTinO2n + 1 with n = 1, 2 and 5 at lower temperatures than those used for the ordinary solid-state reaction procedure. The formation of pure BaTinO2n + 1 occurred when precursors obtained from PC-derived gel materials were heat-treated at 800-900°C in static air for 2 h. BaTinO2n + 1 powders were subsequently converted to RuO2-loaded materials, and their photocatalytic activities for the decomposition of water were examined. While the RuO2-BaTi2O5 (n = 2) and RuO2-BaTi5O11 (n = 5) materials exhibited photocatalytic activity for water decomposition into H2 and O2 in approximately stoichiometric amounts (H2:O2 = 2:1) under UV light irradiation with specific hydrogen gas evolution rates of 125 and 52 μmol h-1 g-1, respectively, the RuO2-BaTiO3(n = 1) exhibited a very low activity of less than 1 μmol h-1 g-1. The lack of a significant occurrence of photocatalysis in BaTiO3 was explained in terms of its crystal structure possessing only a very small polyhedral distortion.

Original languageEnglish
Pages (from-to)1782-1786
Number of pages5
JournalJournal of Materials Chemistry
Volume12
Issue number6
DOIs
Publication statusPublished - 2002
Externally publishedYes

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Decomposition
decomposition
Powders
Water
synthesis
water
gas evolution
Photocatalysis
Solid state reactions
Ultraviolet radiation
Hydrogen
purity
Gels
Crystal structure
Gases
Irradiation
gels
occurrences
solid state
heat

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Materials Chemistry
  • Materials Science(all)

Cite this

Synthesis of RuO2-loaded BaTinO2n + 1 (n = 1, 2 and 5) using a polymerizable complex method and its photocatalytic activity for the decomposition of water. / Yamashita, Yohichi; Tada, Masaru; Kakihana, Masato; Osada, Minoru; Yoshida, Kiyohide.

In: Journal of Materials Chemistry, Vol. 12, No. 6, 2002, p. 1782-1786.

Research output: Contribution to journalArticle

Yamashita, Yohichi ; Tada, Masaru ; Kakihana, Masato ; Osada, Minoru ; Yoshida, Kiyohide. / Synthesis of RuO2-loaded BaTinO2n + 1 (n = 1, 2 and 5) using a polymerizable complex method and its photocatalytic activity for the decomposition of water. In: Journal of Materials Chemistry. 2002 ; Vol. 12, No. 6. pp. 1782-1786.
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abstract = "A polymerizable complex (PC) technique was utilized to prepare fine powders of high purity BaTinO2n + 1 with n = 1, 2 and 5 at lower temperatures than those used for the ordinary solid-state reaction procedure. The formation of pure BaTinO2n + 1 occurred when precursors obtained from PC-derived gel materials were heat-treated at 800-900°C in static air for 2 h. BaTinO2n + 1 powders were subsequently converted to RuO2-loaded materials, and their photocatalytic activities for the decomposition of water were examined. While the RuO2-BaTi2O5 (n = 2) and RuO2-BaTi5O11 (n = 5) materials exhibited photocatalytic activity for water decomposition into H2 and O2 in approximately stoichiometric amounts (H2:O2 = 2:1) under UV light irradiation with specific hydrogen gas evolution rates of 125 and 52 μmol h-1 g-1, respectively, the RuO2-BaTiO3(n = 1) exhibited a very low activity of less than 1 μmol h-1 g-1. The lack of a significant occurrence of photocatalysis in BaTiO3 was explained in terms of its crystal structure possessing only a very small polyhedral distortion.",
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