Synthesis of mesoporous Nb2O5 with crystalline walls and investigation of their photocatalytic activity

• SUZUKI Norihiro

  World Premier International (WPI) Research Center for Materials Nanoarchitechtonics (MANA), National Institute for Materials Science (NIMS)

• ATHAR Taimur

  Indian Institute of Chemical Technology (IICT)

• HUANG Yu-Tzu

  Department of Bioenvironmental Engineering and R&D Center for Membrane Technology, Chung Yuan Christian University

• SHIMASAKI Kotaro

  Department of Life, Environment and Materials Science, Faculty of Engineering, Fukuoka Institute of Technology (FIT)

• MIYAMOTO Nobuyoshi

  Department of Life, Environment and Materials Science, Faculty of Engineering, Fukuoka Institute of Technology (FIT)

• YAMAUCHI Yusuke

  World Premier International (WPI) Research Center for Materials Nanoarchitechtonics (MANA), National Institute for Materials Science (NIMS) Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST)

抄録

We synthesize various kinds of mesoporous Nb₂O₅ samples by changing surfactants (P123 and Brij 56), followed by calcination (from 400 to 500 and 600°C). The effect of these parameters helps to produce a well-defined mesoporous framework with crystallinity. The mesoporous Nb₂O₅ samples are well characterized by using small-angle X-ray scattering (SAXS) measurements, N₂ adsorption–desorption isotherms, and wide-angle XRD measurements. In a P123 system, the frameworks are well crystallized to the TT-phase (pseudo-hexagonal) by calcination at 500°C with retention of the mesoporous structures. In the Brij 56 system, after calcination at 500°C, the framework is well retained in an amorphous state. It is proved that the thick walls prepared with P123 are easily crystallized in comparison to thin walls prepared with Brij 56. Furthermore, we investigate the photocatalytic activity by using several types of mesoporous Nb₂O₅ prepared with P123. All these mesoporous Nb₂O₅ samples show photocatalytic activity with their decomposition reaction of methylene blue (MB) molecules. It is concluded that the reaction rates depend on their crystallinities in the frameworks, surface areas, and average mesopore sizes.

収録刊行物

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 119 (1390), 405-411, 2011

  公益社団法人 日本セラミックス協会

キーワード

• Mesoporous material
• Surfactant
• Nb₂O₅
• Photocatalytic activity

詳細情報

• CRID: 1390001205287617024
• NII論文ID: 130000784600
• NII書誌ID: AA12229489
• DOI: 10.2109/jcersj2.119.405
• ISSN: 13486535
• ISSN: 18820743
• NDL書誌ID: 11096727
• Web Site: http://id.ndl.go.jp/bib/11096727
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11096727
• Web Site: http://www.jstage.jst.go.jp/article/jcersj2/119/1390/119_1390_405/_pdf
• 本文言語コード: en
• データソース種別:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• 抄録ライセンスフラグ: 使用不可