以四氯化钛为原料 ,采用溶胶凝胶法技术合成路线 ,可以获得平均粒径在 30到 4 0纳米的二氧化钛粉末。在X—射线衍射 (XRD)和拉曼散射 (Raman)测试技术下 ,分析得到红外干燥方式下可使锐钛矿向金红石相转化 ,同时由于TiO2 纳米晶粒的尺寸效应以及弱的结晶性和局部格点不完善 ,使得Raman光谱特征峰向低波数移动。此外 ,随着反应温度的提高 ,逐步有金红石相产生 ,而 4 48cm- 1Eg 活性模对温度的依赖性体现了反斯托克斯现象。 Titanium tetrachloride as raw material, the use of sol-gel method for the synthesis of technology, you can get an average particle size of 30 to 40 nanometers titanium dioxide powder. Under the XRD and Raman techniques, the anatase to rutile phase can be transformed by infrared drying method. Meanwhile, due to the size effect of TiO2 nanocrystals and weak crystallinity, Local lattice imperfections, making Raman spectral peak shift to low wavenumbers. In addition, with the increase of the reaction temperature, the rutile phase is gradually produced, and the dependence of temperature on the 4 48cm-1Eg activity mode reflects the anti-Stokes phenomenon.