【摘要】 采用水解 沉淀法,以四氯化钛为原料,通过添加少量的硫酸铝、硅酸钠来改变氧化钛的晶型;利用X射线检测氧化钛的晶体结构,透射电镜观察表面形貌,并利用液氮吸附法测试比表面积;结果表明:添加少量的硫酸铝可以将金红石型氧化钛转化为锐钛型;当在锐钛型氧化钛的基础上添加少量的硅酸钠后,又能抑制金红石的产生,氧化硅含量越高,锐钛型转化为金红石越难,比表面积越大;XRD、TEM检测出氧化物粒径为3～20nm。更多还原

【Abstract】 The crystal type of nano-titania was conversed by hydrolysis-precipitation method with TiCl₄ added aluminum sulfate or sodium silicate; the crystal structure, surface morphology and specific surface areas were characterized by XRD, TEM, and BET method; the results shown that the rutile titania could be transformed anatase by added aluminum sulfate, on the other hand, sodium silicate may prevent rutile titania from anatase, the more the content of SiO₂ in the anatase titania, the higher the specific surface area.更多还原