期刊
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
卷 445, 期 -, 页码 21-29出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.colsurfa.2013.12.069
关键词
Hematite nanocubes; Hydrolysis; Formation mechanism
资金
- Swiss National Science Foundation
- Adolphe Merkle Foundation
We have synthesized hematite cube-shaped nanoparticles using different synthesis paths to examine the effect of the intermediate product akaganeite (beta-FeOOH) on the size and shape of the final hematite particles. Akaganeite spindles and hematite nanocubes are prepared using forced hydrolysis of iron chloride (FeCI3) salt. We use a combination of transmission electron microscopy (TEM), high resolution transmission electron microscopy (HR-TEM),selected area electron diffraction (SAED) and dynamic light scattering (DLS). Akaganeite particles are found to be spindles, with an average length that depends linearly on the FeCI3 concentration, while their aspect ratio is hardly affected by the same parameter. Adjusting the akaganeite concentration from 0.01 M to 0.10 M equivalent of FeCI3 in the subsequent transformation to hematite leads to single crystal nanocubes with sizes ranging from 37 to 175 nm. The combination of akaganeite concentration and size is found to be the key parameter to control the size and crystallinity of the resulting hematite particles. Possible formation mechanisms of single and polycrystalline hematite nanocubes are discussed. (c) 2014 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据