无机材料纳米枝杈晶的合成成为最近几年纳米材料合成的热点之一。以Ti(SO4)2和Sr(NO3)2为原料,以KOH为矿化剂,在没有采用任何模板和表面活性剂的条件下,首次采用水热法在0.1mol/LKOH200℃保温4h条件下成功制备出了SrTiO3枝杈晶。用X射线衍射(XRD)和透射电镜(TEM)对制备出的产物结构和形貌进行了表征。结果表明,在水热反应初期,首先生成了大量的直径约为5nm的TiO2纳米球形颗粒,随着反应的继续进行,TiO2纳米颗粒逐渐减少直至消失,最终得到SrTiO3枝杈晶。所采用的水热合成方法可以用来合成其他钙钛矿氧化物,是一种非常有前途的纳米枝杈晶的制备方法。 The synthesis of nanometer twig crystals of inorganic materials has become one of the hot spots in the synthesis of nanomaterials in recent years. With Ti (SO4) 2 and Sr (NO3) 2 as raw materials and KOH as mineralizer, hydrothermal method was first used under the condition of 0.1mol / L KOH at 200 ℃ for 4h without any template and surfactant Successfully prepared SrTiO3 twig crystals. The structure and morphology of the prepared product were characterized by X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that a large number of nano-spherical particles of TiO2 with a diameter of about 5 nm are formed at the initial stage of hydrothermal reaction. As the reaction proceeds, the nano-TiO2 particles gradually disappear and disappear, finally obtaining SrTiO3 twig bifurcation. The hydrothermal synthesis method used can be used to synthesize other perovskite oxides, which is a very promising method for preparing nanocrystalline twigs.