BaMoO_4微晶的微乳液可控合成及形成机理探讨

采用聚乙二醇对异辛基苯基醚(Triton X-100)/正戊醇/环己烷/水溶液所形成的微乳液体系,控制合成出了四方晶系BaMoO4微晶,考察了微乳液中水与表面活性剂物质的量之比和反应物浓度对产物形貌的影响。采用扫描电子显微镜(SEM)、X-射线衍射(XRD)分别对产物的结构、粒度和形貌进行了表征。结果表明,在微乳液体系中,控制不同的实验条件,可以成功地合成蝴蝶结状以及不同长度树枝状的BaMoO4微晶,并且粒径分布集中,无团聚现象。论文还对不同形貌BaMoO4微晶的形成机理进行了初步探索。

Controlled synthesis and mechanisms of formation of BaMoO4 crystallites with different morphologies in water/oil microemulsions

Tetragonal BaMoO4 crystallites with different morphologies have been prepared in microemulsions containing poly(ethyleneglycol) tert-octylphenyl ether (Triton X-100), n-amyl alcohol, cyclohexane and water. The structures and morphologies of the BaMoO4 crystallites were characterized by scanning electron microscopy (SEM),and X-ray powder diffraction (XRD). The influence of varying the molar ratio of water to surfactant and the concentration of the reactant on the morphologies and sizes of the BaMoO4 crystallites were studied. Bow-tie shaped BaMoO4 crystallites or dendritic BaMoO4 crystallites with different lengths can be prepared under different experimental conditions. The mechanisms of formation of the various morphologies of BaMoO4 crystallites in microemulsions are also discussed.