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采用沉淀-胶溶-絮凝法,以偏钛酸为反应物,制备出锐钛矿型纳米TiO2粉末,用X射线衍射(XRD)、透射电镜(TEM)和高温Raman光谱对其结构进行表征.并采用高温Raman光谱仪对所制备的纳米TiO2从25~1200℃进行了原位Raman光谱研究.温度较低时,锐钛矿相的Raman谱峰明显可见,由于高温下Raman信号减弱,随着温度升高,Raman特征谱峰逐渐减弱以至于全部消失,仅显示出几个宽宽的凸起.同时,高温Raman光谱存在明显的温度效应,因而导致了随温度升高144cm-1和196cm-1谱峰的蓝移,640cm-1谱峰的红移以及谱峰宽化.

参考文献

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