2012年8月
Phosphate constituent effects on the structure and photocatalytic properties of mesoporous tungsten oxides
MICROPOROUS AND MESOPOROUS MATERIALS
- ,
- ,
- 巻
- 158
- 号
- 開始ページ
- 13
- 終了ページ
- 18
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/j.micromeso.2012.03.015
- 出版者・発行元
- ELSEVIER SCIENCE BV
Mesoporous WO3 replicas were synthesized by a hard template method using ammonium metatungstate (AMT) or phosphotungstic acid (PTA) as a tungsten source. The mesoporous WO3 replica synthesized from AMT (WO3-AMT) and PTA (WO3-PTA) consisted of a crystalline monoclinic phase and mixed crystalline tetragonal and monoclinic phases, respectively. The absorption of WO3-PTA in the visible region was stronger than that of WO3-AMT. These characteristics reflected the oxidation states, which were affected by the existence or non-existence of minor phosphate constituents in the mesoporous WO3 replica. WO3-PTA contained a phosphate constituent from the tungsten source. However, WO3-AMT and WO3-PTA have similar mesostructures and band-gap energies. WO3-AMT and WO3-PTA with Cu2+ ions showed 28.4 and 5.5 times higher photocatalytic activities than that of bare commercial TiO2 (P-25) in decomposition of acetic acid under visible-light irradiation. The phosphate in WO3-PTA functioned as a recombination center. (C) 2012 Elsevier Inc. All rights reserved.
- リンク情報
- ID情報
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- DOI : 10.1016/j.micromeso.2012.03.015
- ISSN : 1387-1811
- Web of Science ID : WOS:000305714200003