%0 Journal Article
%T Microstrcture Characterization and Properties of TiO2/α-FeOOH Nanocomposites
%A WANG Yan-Fei
%A WANG Wei
%A ZHENG Yi-Fan
%A LI Guo-Hua
%J 无机材料学报
%D 2013
%I Science Press
%R 10.3724/sp.j.1077.2013.12194
%X A series of TiO2/α-FeOOH nanocomposites were prepared by hydrolysis precipitation method at different temperatures using TiCl4 as Ti source and α-FeOOH as support. The phase composition, morphology, microstructure and optical properties of the samples were investigated by XRD, HRTEM, STEM and UV-DRS. The results show that with the temperature gradually increasing from 30  o 90  the core-shell structure first gets better and then worse, and the best core-shell structure is formed at 45  The shell is composed of fine grains of rutile TiO2 and the large grain of α-FeOOH serves as the core, and the nanocomposites coated continuous and dense. The interaction between TiO2 and α-FeOOH is not only physical adsorption, a coherent lattice structure is formed at the interface between TiO2 and α-FeOOH, which leads to a large lattice distortion and a good composite structure. UV-DRS results show that the largest red shift of absorption peak is observed for the composite with good core-shell structure, indicating that the TiO2/α-FeOOH nanocomposites can greatly expand the range of spectral response and thus improve the utilization of sunlight.
%K <p>rutile
%K goethite
%K nanocomposite
%K microstructure</p>
%U http://www.jim.org.cn/fileup/PDF/20130210.pdf