微乳液结合Sol-Gel法制备纳米ZnTiO_3及其表征

将溶胶-凝胶法与微乳液化学剪裁法相结合,以钛酸丁酯和氯化锌制备凝胶,在OP-10-SDS/正丁醇/环己烷/水复配微乳体系中进行化学剪裁制备前驱物,再经煅烧制备了组成单一的球状纳米ZnTiO3粉体,通过XRD、TEM、SEM、TG-DSC等方法对产物进行了表征,并讨论了凝胶的陈化时间、煅烧温度和煅烧时间对纳米ZnTiO3的组成、粒径和形貌的影响,提出了纳米ZnTiO3可能的形成机理。结果表明,在700℃煅烧2h制备的纳米ZnTiO3平均粒径为35nm,粒径分布比较均匀,基本呈单分散;适当延长陈化时间会减少ZnO及TiO2杂质;随着煅烧时间的延长,ZnTiO3晶体粒径开始增大;煅烧温度过高会使六方相ZnTiO3分解为立方相的Zn2TiO4和金红石型TiO2。

Preparation and Characterization of ZnTiO3 Nano Particles by Sol-Gel-Microemulsion Method

Zinc titanate（ZnTiO3） nano particles had been prepared by sol-gel-microemulsion chemical tailoring method.The gel prepared by Ti（OC4H9）4 and zinc chloride was tailored in OP-10-SDS/n-butanol/cyclohexane/water microemulsion.ZnTiO3 Nano particles were characterized by XRD,TEM,SEM and TG-DSC.The influence of aging time of the gel,calcination temperature and calcination time on the composition,particle size and morphology of ZnTiO3 nano particles were investigated.The results showed that the average particle size of ZnTiO3 nano particles was 35 nm,the particle size distribution was uniform with good monodispersity when it was calcined at 700 ℃ for 2 h.The TiO2 and ZnO impurities were reduced with aging time extension,particle size of ZnTiO3 was increased with calcination time extension,hexagonal ZnTiO3 was decomposed of cubic Zn2TiO4 and rutile TiO2 at higher calcination temperature.