TiO2是一种具有广泛应用前景的氧化物材料,其结构及相关的物理化学特性一直是实验和理论研究的焦点。常温常压下TiO2可以以四种形态存在,即锐钛矿、金红石、板钛矿和α-PbO2型。其中属四方晶系的金红石是最稳定的,其它几种形态在高温下都将转变成金红石。板钛矿和α-PbO2型TiO2 TiO2 is a kind of oxide material with wide application prospects. Its structure and related physicochemical properties have been the focus of experimental and theoretical research. Under normal temperature and pressure TiO2 can exist in four forms, namely anatase, rutile, brookite and α-PbO2 type. One of the tetragonal rutile is the most stable, and several other forms will be transformed into rutile at high temperatures. Brookite and α-PbO2 type TiO2