一种直接混合生成Al_(13)硫酸盐晶体的简易方法(英文)  

Facile Synthesis of Crystalline Al_(13) Sulfates via Direct Mixing Route

作　　者：张渊明[1] 杨发达[1] 唐渝[1] 李红[2] 

机构地区：[1]暨南大学化学系,广州510632 [2]暨南大学材料科学与工程系,广州510632

出　　处：《无机化学学报》2006年第5期832-838,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金资助项目(No.29903004)

摘　　要：将一定量的Na2SO4溶液直接加入在60￣80℃温度下预处理过的Al13溶液中,然后室温陈化12h,可简便快速地制备具有四面体形貌和纤维状形貌的Al13基硫酸盐晶体。所得晶体的SEM和OS图显示:用本文报道的方法合成的四面体形貌的硫酸盐晶体尺寸大小在150￣200μm,而通过滴定方法的却只有15￣25μm;纤维状的硫酸盐晶体的长径尺度分别是>1000μm和0.5￣1μm。对四面体形貌的Al13基硫酸盐晶体的生长机理进行了初步探讨。Uniform tetrahedral and fiber-like crystalline sulfates of [AlO4Al12（OH）24（H2O）12]^7＋ polyoxocations were synthesized via a direct mixing and aging route. XRD patterns reveal that tetrahedral and fiber-like crystalline Al13 sulfates are cubic and monoclinic structure, respectively. SEM and Optical Scanning （OS） images show that the size of tetrahedral crystalline Al13 sulfates prepared via a direct mixing way is 150-200 μm, which is almost 10 times larger than that via traditional titration way （15-25 μm）. The size of the fiber-like crystalline Al13 sulfates is 0.5~1 I^m in diameter and up to 1 000 μm in length. A possible crystal growth mechanism for the tetra- hedral crystalline Al13 sulfates is discussed.

关 键 词：Al13多聚阳离子 SEM直接混合 四面体结晶 

分 类 号：O613.51[理学—无机化学] O614.31[理学—化学]