微乳法制备Co_3O_4纳米材料及其形成机理研究  

Controllable Synthesis of Co_3O_4 Nanomaterials by a Solvothermal-mediated Microemulsion Method and its Formation Mechanism

作　　者：孙灵娜[1] 王苏杭[1] 

机构地区：[1]深圳大学化学与化工学院,深圳518060

出　　处：《化学研究与应用》2011年第6期702-706,共5页Chemical Research and Application

基　　金：国家自然科学基金项目(21001074)资助;广东省自然科学基金博士启动项目(2008078)资助;深圳大学科研启动基金项目(200813)资助

摘　　要：采用Co（NH3）6Cl3为钴源,利用微乳法制备了Co3O4的纳米材料,可控合成了尺寸均一的边长约40~50 nm纳米立方和直径约400 nm的纳米球。并且考察了反应条件对产物形貌的影响,水与CTAB的摩尔比（w）和反应物浓度对产物形貌有着很大的影响,而反应温度对产物形貌基本没有影响。随着w值的增加,合成的纳米材料的尺寸逐渐增大,并且形貌由纳米立方转变为纳米球。采用X-射线粉末衍射仪、扫描电子显微镜、透射电子显微镜对产物的组成和形貌进行了表征。最后提出了不同形貌纳米材料可能的形成机理。Co3O4 nanomaterials were prepared with Co（NH3）6Cl3 as precursor through a facile solvothermal-mediated microemulsion method.Nanocubes with the average edge of 40~50 nm and nanospheres with the mean diameter of 400 nm were controllably synthesized by altering the reaction conditions.The molar ratio（w）between water and CTAB,as well as the concentration of reactants,played important roles for the morphological control of the products.But the reaction temperature exhibited no obvious influence on the morphologies of the products.With the increase of the w value,the size of the as-synthesized products increased gradually and the morphologies changed from nanocubes to nanospheres.X-ray powder diffraction,transmission electron microscopy,and scanning electron microscope were used to characterize the products.And the formation mechanism of different nanomaterials was studied and discussed,respectively.

关 键 词：CO3O4 纳米立方 纳米球 微乳法 

分 类 号：O614.8[理学—无机化学]