溶胶-凝胶模板法合成SmFeO_3纳米线  

Synthesis og Highly Ordered SmFeO3 Nanowires Arrays by Sol-Gel Template Method

作　　者：牛新书[1] 陈建军[1] 刘山虎[1] 蒋凯[1] 

机构地区：[1]河南师范大学化学与环境科学学院河南省环境污染控制重点实验室,河南新乡453007

出　　处：《中国稀土学报》2007年第3期305-308,共4页Journal of the Chinese Society of Rare Earths

基　　金：国家自然科学基金(20571025);河南省自然科学基金(0424270073)资助项目

摘　　要：通过阳极氧化在质量分数为0.3 mol.L-1草酸溶液中制得多孔氧化铝膜。经5%(质量分数)的磷酸扩孔处理得到具有孔径大小均一,排列有序,并具有一定厚度的阳极氧化铝模板(AAO)。用溶胶-凝胶法在氧化铝模板中制备了直径约为50 nm的有序SmFeO3纳米线阵列。用扫描电镜(SEM)、透射电镜(TEM)和X射线衍射仪(XRD)对SmFeO3纳米线的形貌、结构以及相组成进行了分析。结果发现:纳米线的长度受控于氧化铝模板的厚度,直径与氧化铝模板的孔径相等。同时分析了纳米线的形成机制。Anodic aluminum oxide （ AAO ）＇templates with uniform pore diameter and periodicity were fabricated using oxidization method in 0.3 mol· L^-1 oxalic solution at room temperature. The pore-widening was fulfilled in 5 % phosphoric acid. Then, arrays of SmFeO3 nanowires were prepared by a sol-gel method in the pores of anodic alumina membranes, the diameter of the SmFeO3 nanowires was 50 nm. The morphology and crystalloid structure of SmFeO3 nanowires were characterized by scanning electron microscope（SEM）, transmission electron microscope（TEM） and X-ray diffraction （XRD）. The results showed that SmFeO3 nanowires were very uniformly assembled and parallel to each other in the pores of the AAO template. The length and diameter of nanowires were dependent on the thickness and hole diameter of AAO. At the same time, the formation mechanism of nanowises was also discussed.

关 键 词：铁酸钐 纳米线 模板 溶胶-凝胶 稀土 

分 类 号：TP212.2[自动化与计算机技术—检测技术与自动化装置]