摘要
以草酸为电解液,采用两次阳极氧化的方法,制备了Al2O3微米树.用X射线衍射仪(XRD)、扫描电子显微镜(SEM)及荧光分光光度计对所制备的Al2O3微米树进行了分析.结果表明,在一定的实验条件下,可以得到形状类似于树状的a—Al2O3其树干尺寸为600-800nm,并且由α—Al2O3的颗粒均匀堆积而成.其荧光发射峰在304nm,与氧空位有关,属于F^+型(1B→1A)电子跃迁,并对其发光机制进行了讨论.
By using oxalic acid as the electrolyte and two-step anodic oxidation, alumina micron-trees were prepared, which were analyzed through X-ray diffraction (XRD), scanning electron microscopy (SEM JSM-6700F) and spectrophotometer. The results have indicated that, under some conditions, the a -A1203 shaped-like trees can be obtained, whose bole consists of grains sized between 600 nm and 800 nm. The PL spectra of alumina micron-trees were related with the oxygen vacancies, whose main emission peak was at 304 nm. The emission spectra were attributed to F^+ (1B→IA). Finally, the luminescence mechanisms were also discussed.
出处
《湖南大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2010年第3期62-65,共4页
Journal of Hunan University:Natural Sciences
基金
教育部新教师基金资助项目(20070532043)
中国博士后科学基金资助项目(20080431020)
关键词
氧化铝模板
微米树
发射光谱
氧空位
alumina template
micron tree
emission spectroscopy
oxygen vacancy