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以钛酸四丁酯为钛源,氨水为溶剂,氢氟酸为氟源,利用溶剂热法制备二氧化钛粉体。利用X射线衍射(XRD)、扫描电镜(SEM)、氮气吸附脱附(BET)、傅里叶变换红外光谱(FT-IR)等技术对其进行了系统的表征,以亚甲基蓝(MB)溶液为染料,考察了氟离子修饰的TiO_2对光催化性能的影响。结果表明:用氨水为溶剂,氢氟酸为氟源制得的样品TiO_2均为锐钛矿相,氟离子以化学吸附态存在于TiO_2表面,并且氟离子的修饰增加了其晶化度,抑制了晶粒的生长,增大了晶粒的比表面积,促进了羟基自由基(·OH)的形成,从而提高了TiO_2粉体的光催化活性。
Titanium tetrabutoxide as titanium source, ammonia as solvent, hydrofluoric acid as fluorine source, the use of solvothermal method to prepare titanium dioxide powder. The system was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), nitrogen adsorption-desorption (BET) and Fourier transform infrared spectroscopy (FT-IR) Dye, investigated fluoride ion-modified TiO 2 photocatalytic properties. The results show that the samples prepared by using hydrofluoric acid as the source of fluoride and hydrofluoric acid as the source of fluorine are all anatase phase, and the fluoride ion exists in the chemical adsorption state on the surface of TiO_2, and the modification of fluoride ion increases its crystallinity and inhibits The growth of the grains increased the specific surface area of the grains and promoted the formation of hydroxyl radicals (· OH), which increased the photocatalytic activity of the TiO 2 powders.