用均相水解法通过调节对甲苯磺酸的添加量制备了金红石含量线性可控的纳米TiO2 粒子 ,相同条件下 ,没有加入对甲苯磺酸时 ,制备的TiO2 颗粒为纯锐钛矿晶型 .制备的纳米TiO2 颗粒 ,其单晶尺寸为 19 5nm(金红石 ) ,13 5nm (锐钛矿 ) ,比表面积 72 7m2 /g ,通过公式计算得到了制备的TiO2 纳米颗粒带隙能为 2 83eV ,比P2 5和纯锐钛矿纳米TiO2 颗粒的带隙能均低 Nano-TiO2 particles with controlled rutile content were prepared by adjusting the addition amount of p-toluenesulfonic acid by homogeneous hydrolysis. Under the same conditions, pure titanium particles were prepared without adding p-toluenesulfonic acid. The prepared nano-TiO2 particles with a single crystal size of 19 5 nm (rutile), 13 5 nm (anatase) and a specific surface area of ​​72 7 m2 / g have been obtained by calculation of the formula. The band gap energy of the prepared nano-TiO2 particles is 2 83 eV, P2 5 and pure anatase nano-TiO2 particles have low band gap energy