Visible-light-derived photocatalyst based on TiO 2-δN δ with a tubular structure

Yoshikazu Hirose, Toshinori Mori, Yuka Morishita, Atsushi Itadani, Takayuki Kudoh, Takahiro Ohkubo, Tomoko Matsuda, Shigeharu Kittaka, Yasushige Kuroda

Research output: Contribution to journalArticle

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Abstract

We succeeded in achieving visible-light responsiveness on a tubular TiO 2 sample through the treatment of a tubular TiO 2 that has a large surface area with an aqueous solution of ammonia or triethylamine at room temperature and subsequent calcination at 623 K, which produced a nitrided tubular TiO 2 sample. It was found that the ease of nitridation is dependent on the surface states; washing the tubular TiO 2 sample with an aqueous acidic solution is very effective and indispensable. This treatment causes the appearance of acidic sites on the tubular TiO 2, which was proved by the following experiments: NH 3 temperature-programmed desorption and two types of organic reactions exploiting the acid properties. The prepared samples, TiO 2-δN δ, efficiently absorb light in the visible region, and they exhibit a prominent feature for the decomposition of methylene blue in an aqueous solution at 300 K under irradiation with visible light, indicating the achievement of visible-light responsiveness on the tubular TiO 2 sample. This type of tubular TiO 2-δN δ sample has merit in the sense that it has a large surface area and a characteristic high transparency for enabling photocatalytic reactions because it has a tubular structure and is composed of thin walls.

Original languageEnglish
Pages (from-to)9948-9957
Number of pages10
JournalInorganic Chemistry
Volume50
Issue number20
DOIs
Publication statusPublished - Oct 17 2011

Fingerprint

Photocatalysts
aqueous solutions
Nitridation
Methylene Blue
Surface states
Temperature programmed desorption
Ammonia
Washing
Calcination
Transparency
thin walls
methylene blue
washing
Irradiation
Decomposition
roasting
Acids
ammonia
desorption
decomposition

ASJC Scopus subject areas

  • Inorganic Chemistry
  • Physical and Theoretical Chemistry

Cite this

Visible-light-derived photocatalyst based on TiO 2-δN δ with a tubular structure. / Hirose, Yoshikazu; Mori, Toshinori; Morishita, Yuka; Itadani, Atsushi; Kudoh, Takayuki; Ohkubo, Takahiro; Matsuda, Tomoko; Kittaka, Shigeharu; Kuroda, Yasushige.

In: Inorganic Chemistry, Vol. 50, No. 20, 17.10.2011, p. 9948-9957.

Research output: Contribution to journalArticle

Hirose, Y, Mori, T, Morishita, Y, Itadani, A, Kudoh, T, Ohkubo, T, Matsuda, T, Kittaka, S & Kuroda, Y 2011, 'Visible-light-derived photocatalyst based on TiO 2-δN δ with a tubular structure', Inorganic Chemistry, vol. 50, no. 20, pp. 9948-9957. https://doi.org/10.1021/ic200424v
Hirose, Yoshikazu ; Mori, Toshinori ; Morishita, Yuka ; Itadani, Atsushi ; Kudoh, Takayuki ; Ohkubo, Takahiro ; Matsuda, Tomoko ; Kittaka, Shigeharu ; Kuroda, Yasushige. / Visible-light-derived photocatalyst based on TiO 2-δN δ with a tubular structure. In: Inorganic Chemistry. 2011 ; Vol. 50, No. 20. pp. 9948-9957.
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