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TiO2/Fe2O3核-壳粒子的制备及光学性能
Alternative TitleSynthesis and optic character of TiO2/Fe2O3 core-shell particles
张霞; 赵岩; 张彩碚
2005
Source Publication材料研究学报
ISSN1005-3093
Volume19.0Issue:004Pages:343-348
Abstract钛酸四丁酯(TBOT)水解产生的TiO2沉积在单分散准球形α-Fe2O3颗粒的表面,形成均匀、连续的核-壳结构,TiO2壳层的厚度约为30nm.在500℃热处理后,TiO2壳层从非晶态转变为锐钛矿结构,在光激发下,TiO2/Fe2O3核-壳粒子的电子从TiO2价带跃迁到能量较低的α-Fe2O3导带,在可见光区产生新的强吸收峰.光谱计算结果表明TO2价带与α-Fe2O3导带的能量差为1.6eV.
Other AbstractA continuous uniform layer of amorphous TiO2 obtained by the hydrolysis of TBOT could be deposited on the surface of monodispersed pseudo-spherical α-Fe2O3. The thickness of the TiO2 shell was about 30 nm. After heat treatment at 500℃, the structure of TiO2 shell transformed to the anatase. The UV-Vis spectrum of core-shell particles showed that the electron, induced by UV-Vi sray, transferred from the valence band of TiO2 to the conduction band of α-Fe2O3. As a result, the absorb peak of core-shell particles shifted toward long wave, and the maximum absorbance appeared in the range of visible ray area.
Keyword复合材料 单分散 准球形α-Fe2O3 锐钛矿TiO2 核-壳粒子
Indexed ByCSCD
Language中文
CSCD IDCSCD:2027141
Citation statistics
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/143936
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
张霞,赵岩,张彩碚. TiO2/Fe2O3核-壳粒子的制备及光学性能[J]. 材料研究学报,2005,19.0(004):343-348.
APA 张霞,赵岩,&张彩碚.(2005).TiO2/Fe2O3核-壳粒子的制备及光学性能.材料研究学报,19.0(004),343-348.
MLA 张霞,et al."TiO2/Fe2O3核-壳粒子的制备及光学性能".材料研究学报 19.0.004(2005):343-348.
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