In situ-templated hydrothermal synthesis of Fe-doped anatase nanorods

被引:14
|
作者
Yang, J
Mei, S
Quaresma, S
Norby, P
Ferreira, JMF
机构
[1] Univ Oslo, Dept Chem, N-0315 Oslo, Norway
[2] Tech Univ Bergakad Freiberg, Inst Ceram Mat, Fac Mat Sci & Technol, D-09596 Freiberg, Germany
[3] Univ Aveiro, CICECO, Dept Ceram & Glass Engn, P-3810193 Aveiro, Portugal
关键词
anatase; nanorods; in situ-templated; hydrothermal;
D O I
10.1016/j.actamat.2004.12.001
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Anatase single crystal nanorods with aspect ratios of 4-10 and diameters of 70-100 nm were prepared by hydrothermal treatment of tetraethylammonium hydroxide peptized titania sol doped with Fe(III) cations at 200 degrees\C. Two types of iron sources were used as dopants: (i) Fe(NO3)(3), which could form alpha-FeOOH during the hydrothermal synthesis; (ii) hydrothermally synthesized ot-FeOOH. The formation of anatase nanorods in the Fe3+ doped titania could be attributed to porous goethite (alpha-FeOOH) rods formed during the hydrothermal treatment. The in situ formed ot-FeOOH template could lead to well dispersed anatase nanorod crystals in contrast to the strongly agglomerated rods obtained when adding as-synthesized ot-FeOOH. The templates do not need to be removed since a solid solution forms between the Fe ions and anatase during hydrothermal treatment. (C) 2004 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码:1479 / 1484
页数:6
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