Thermal influence on the structure and photocatalytic activity of mesoporous titania consisting of TiO2(B)

Teruhisa Hongo*, Atsushi Yamazaki

*この研究の対応する著者

研究成果査読

20 被引用数 (Scopus)

抄録

Mesoporous titania was synthesized using the evaporation-induced self-assembly method. The sample calcined at 300 °C had a wormhole-like structure with uniform mesopores consisting of TiO2(B). The sample calcined at 350 °C consisted of a mixed phase of TiO2(B) and anatase; however, the mesoporous structure showed little change compared with that of the sample calcined at 300 °C because the phase transition from TiO2(B) to anatase has a displasive phase transition mechanism with no atomic diffusion and accompanying no crystallite growth. When calcined above 400 °C, the mesoporous structure collapsed, and aggregates of anatase nanoparticles that were highly crystalline and had high specific surface area were obtained because the mesopores at several nm intervals inhibit anatase particle growth. Samples calcined at 300, 350, 400, and 450 °C showed 1.5, 2.4, 2.5, and 1.8 times higher photocatalytic activity than commercial titania P-25 in acetic acid decomposition.

本文言語English
ページ(範囲)316-321
ページ数6
ジャーナルMicroporous and Mesoporous Materials
142
1
DOI
出版ステータスPublished - 2011 6 1

ASJC Scopus subject areas

  • 化学 (全般)
  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学

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