Fe2O3-TiO2纳米复合颗粒的激光控制合成研究

以微米级的5%Fe2O3粉末和95%TiO2粉末(以质量分数计)形成混合靶材，利用脉冲激光气相蒸发-液相收集控制合成新方法制备Fe2O3-TiO2复合纳米颗粒.采用透射电子显微镜(TEM)、X射线衍射(XRD)、红外光谱、UV光谱检测等测试技术，对实验制备的样品的形貌、组织结构、光吸收性能及合成机理等进行了系统研究.结果表明:用气相蒸发-液相收集激光法制备的Fe2O3-TiO2纳米颗粒外观呈球形，平均粒径约为40nm，颗粒呈链状连接趋势；Fe2O3的复合改善了TiO2纳米颗粒的磁性.对样品在800~200nm区间进行光谱分析，发现Fe2O3复合TiO2后，样品光谱发生红移，改善了TiO2纳米颗粒的光催化性能.

Synthesis of Fe2O3-TiO2 Nano-composite Particles by Pulsed Laser Control

Micron powders of 5wt% Fe2O3and 95wt% TiO2 were mixed to form a target for preparing Fe2O3-TiO2 nano-composite particles using the method of pulsed laser gas phase evaporating-liquid phase collecting. The morphology, microstructure, optical absorption properties and the synthetic mechanism of the prepared sample were characterized using the transmission electron microscopy, X-ray diffraction, infrared spectroscopy, and UV spectrum detecting technology, respectively. The results showed that the prepared Fe2O3-TiO2 particles were sphere-shaped with average diameter of about 40 nm and they linked up with one another like a chain. The Fe2O3-dopant improved the magnetism of the TiO2 nano-particles. The spectral analysis of the Fe2O3-TiO2 particles in the range of 800-200 nm exhibited red-shift, indicating that the photocatalytic performance of TiO2 nano-particles was improved.