CeO_2纳米棒及纳米八面体的制备及生长机理分析  

Preparation of CeO_2 nanorods and nanooctahedrons and analysis of the growth mechanism

作　　者：王芬[1] 杨长安[1] 周长江[1] 王子婧[1] 朱建锋[1] 

机构地区：[1]陕西科技大学材料科学与工程学院,西安710021

出　　处：《功能材料》2015年第14期14088-14091,共4页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51472153)

摘　　要：以Ce(NO3)3·6H2O为起始原料、Na5P3O10和Na3PO4·12H2O分别为矿化剂,采用水热法制备了CeO2纳米八面体和纳米棒,并且对Na5P3O10和Na3PO4·12H2O不同体系中pH值的影响作了分析研究。通过XRD、FESEM、TEM等方法对CeO2纳米棒和纳米八面体样品分析结果表明,在Na5P3O10和Na3PO4·12H2O系统中,初始时CeO2八面体与纳米棒共存,但随着水热时间的延长,在Na5P3O10体系中以CeO2八面体成为主要产物,而在Na3PO4·12H2O体系中以CeO2纳米棒为主要产物;在pH值约为2的条件下,两系统中均只有纳米棒生成。研究得出,Na5P3O10水解产生的HPO2-4是CeO2纳米八面体形成的主要原因,而Na3PO4·12H2O水解产生的H2PO-4是纳米棒形成的主要原因。CeO2nanorods and nanooctahedrons were prepared throuth hydrothermal method at the tempurtaure of180 ℃ using Ce(NO3)3 ·6H2O as start material and Na3PO4 ·12H2O and sodium tripoplyphosphate(Na5P3O10)as the morphological controlling agents respectively.Based on the analysis of XRD,FESEM and TEM,it was found that the formation and growth of the nanooctahedron due to HPO2-4anions in the hydrolysis of the Na5P3O10,whereas the nanorods due to H2PO-4anions in the hydrolysis of Na3PO4·12H2O.Furthermore,only the nanorods were generated in both solutions of pH around of 2.

关 键 词：CEO2 纳米八面体与纳米棒 制备 生长机理 

分 类 号：TB332[一般工业技术—材料科学与工程]