Anatase type nanometer titanium dioxide, and preparation method and use thereof

The invention relates to an anatase type nanometer titanium dioxide, and a preparation method f and a use thereof. The preparation method of the nanometer titanium dioxide comprises the following steps: (1) preparing a precursor containing titanium halide; and (2) heating the precursor in a closed environment to carry out solvothermal treatment in order to obtain the anatase type nanometer titanium dioxide. The anatase type nanometer titanium dioxide has a purity of 99.9% or above, a particle diameter of 20 nm or less and a distribution coefficient of 0.5 or less, and has an absorption effecton ultraviolet lights. The pure anatase type nanometer titanium dioxide product with a controllable particle size is prepared through a one-step solvothermal technology without calcination, so the method has the advantages of low energy consumption, simple process, and rapidness in industrial production. 本发明涉及种锐钛矿型纳米二氧化钛、及其制备方法和用途，所述纳米二氧化钛制备方法包括：(1)制备含有卤化钛的前驱体；(2)密闭环境下，将所述前驱体升温进行溶剂热处理，制得锐钛矿型纳米二氧化钛。所述锐钛矿型纳米二氧化钛的纯度≥99.9％，粒径