Preparation and characterization of monodisperse α-Fe2O3 nanostructured hollow submicrosphere - 文章详情页

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摘要：

The　home-made　monodisperse　SiO2　submicrospheres　were　coated　with　β-FeOOH　by　a　new　solution　growth　method.　The　size　of　SiO2　submicrospheres　had　great　influence　on　the　microstructures　of　β-FeOOH　coatings.　When　the　average　diameter　of　the　submicrospheres　was　250　nm,　the　β-FeOOH　coating　was　uniform　and　the　average　thickness　of　β-FeOOH　coatings　was　about　35　nm　after　the　first　cycle　of　coating.　The　thickness　of　β-FeOOH　coatings　increased　greatly　with　multistep　coating.　After　three　cycles　of　coating,　the　thickness　of　β-FeOOH　coatings　increased　to　about　100　nm.　The　core-shell　composites　were　immersed　in　NaOH　solution　(5%,　mass　fraction)　at　40°C　for　24　h　to　remove　the　silica　cores　and　then　calcined　at　600°C　for　24　h　to　prepare　the　monodisperse　α-Fe2O3　hollow　submicrospheres.　The　α-Fe2O3　shells　in　the　hollow　submicrospheres　were　constructed　with　α-Fe2O3　nanorods　interconnected.

关键词：

α-Fe2O3; Hollow submicrosphere; Monodisperse; Nanorod; SiO2

作者机构：

[ 1 ] [Li, Q.-Y.]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
[ 2 ] [Lou, Z.-L.]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
[ 3 ] [Wang, Z.-H.]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
[ 4 ] [Xie, L.-Y.]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
[ 5 ] [Wei, Q.]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China
[ 6 ] [Nie, Z.-R.]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China

通讯作者信息：

[Li, Q.-Y.]College of Materials Science and Engineering, Beijing University of Technology, Beijing 100022, China

电子邮件地址：

qyli@bjut.edu.cn

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