摘要
采用水热法合成了不同形貌的ZnO微球，利用XRD、TG-DSC、FT-IR、PL和SEM等分析了水热产物及其焙烧产物的形貌、结构和光致发光性能。结果表明，水热温度及焙烧过程对产物有显著影响，随着水热温度的升高，水热产物的形貌逐步由牡丹花状向鹅卵石状转变，经600℃焙烧1h后得到形貌各异、直径10-20um的ZnO微球，其中水热温度较低的ZnO微球为细纳米片组成的海胆状，水热温度较高的为ZnO纳米棒组装成的鹅卵石状。PL分析表明不同形貌的ZnO微球均具有绿光发射特性。
ZnO microspheres with different morphologies were prepared by hydrothermal synthesis method. The morphologies, microstructures and photoluminescence properties of the products before and after calcination were characterized by XILD, TG-DSC, FT-IR, PL and SEM. The results show that the hydrothermal temperature and calcination process have significant effect on the final product. With the increasing of hydrothermal temperatures, the morphologies of hydrothermal products change from peony-like to pebble-like. ZnO microspheres with variable shapes and an average size of 10--20 ~tm can be obtained through calcining hydrothermal product at 600 ℃ for 1 h. The morphology of ZnO microsphere with lower hydrothermal temperature is urchin-like assembled by fine nano-sheets; however, the morphology of product with higher hydrothermal temperature is pebble-like assembled by ZnO nanorods. PL analysis shows that the prepared ZnO microspheres with different morphologies all exhibit strong emission in the range of green light.
出处
《电子元件与材料》
CAS
CSCD
北大核心
2012年第12期60-63,共4页
Electronic Components And Materials
基金
国家自然科学基金资助项目(No.51072141)
关键词
水热法
自组装
ZnO微球
光致发光
hydrothermal process
self-assembly
ZnO microspheres
photoluminescence
