Facile Procedure To Prepare Three-Dimensionally Ordered Macroporous (3DOM) Perovskite-type Mixed Metal Oxides by Colloidal Crystal Templating Method
Facile Procedure To Prepare Three-Dimensionally Ordered Macroporous (3DOM) Perovskite-type Mixed Metal Oxides by Colloidal Crystal Templating Method
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DOI：
10.1021/cm050551u
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发表时间：
2005-06
影响因子：
8.6
通讯作者：
M. Sadakane;T. Asanuma;J. Kubo;W. Ueda
中科院分区：
文献类型：
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作者：
M. Sadakane;T. Asanuma;J. Kubo;W. Ueda
提出了一种用胶体晶体模板法制备钙钛矿型La1-xSrxFeO3 （x = 0−0.4）混合金属氧化物三维有序大孔（3DOM）材料的新方法。该方法可以在整个制备过程中保证所需的金属比，并且可以成功地制备所需的单相材料。将混合金属硝酸盐溶解在乙二醇-甲醇混合溶剂中，并渗透到聚苯乙烯球的胶体晶体模板中。在煅烧过程中，混合金属硝酸盐与乙二醇反应，在聚合物球破裂之前在胶体晶体的空隙中转化为混合金属乙醛酸盐。通过去除球模板，将混合金属乙氧基酸酯转化为混合金属氧化物，得到了钙钛矿型La1-xSrxFeO3 （x = 0 ~ 0.4）混合金属氧化物的3DOM材料，并利用热重-差热分析、x射线衍射等方法对其进行了表征。
A new facile procedure to prepare three-dimensionally ordered macroporous (3DOM) materials of perovskite-type La1-xSrxFeO3 (x = 0−0.4) mixed metal oxides by using colloidal crystal templating method is presented. This method can ensure the desired metal ratio throughout the preparation procedure, and the desired single-phase materials can successfully be prepared. Mixed metal nitrates were dissolved in ethylene glycol−methanol mixed solvent and penetrated into the colloidal crystal template of polystyrene spheres. During the calcination process, the mixed metal nitrates react with ethylene glycol and converted to mixed metal glyoxylates in voids of colloidal crystals before the polymer sphere bursts. After removing the sphere template and converting the mixed metal glyoxylates to the mixed metal oxides, the 3DOM materials of the perovskite-type La1-xSrxFeO3 (x = 0−0.4) mixed metal oxides were obtained, which was characterized on the basis of thermogravimetric−differential thermal analysis, X-ray diffracti...