[CeOx/ZnO纳米复合粉末的制备与发光]
[Preparation and luminescence of CeOx/ZnO nanocomposite powders].
作者信息
Guo Shu-xia, Zhang Xing-tang, Zhao Hui-ling, Li Yun-cai, Huang Ya-bin, Du Zu-liang
机构信息
Key Laboratory of Special Functional Materials, Henan University, Kaifeng 475001, China.
出版信息
Guang Pu Xue Yu Guang Pu Fen Xi. 2005 Jun;25(6):840-3.
CeOx/ZnO nanocomposite powders were prepared by sol-gel process. The powder samples were examined by XRD, TEM, XPS and photoluminescence (PL). PL enhancement of nanocomposite powder at 502 nm compared to pure ZnO was observed when Ce3+ were present in samples. New peak at 603 nm was observed when Ce4+ were present. PL enhancement of nanocomposite powder was correlated with more oxygen vacancies which were caused by Ce3+. The new peak at 603 nm is attributed to new energy transition in the interface of CeO2/ZnO.
通过溶胶 - 凝胶法制备了CeOx/ZnO纳米复合粉末。采用X射线衍射（XRD）、透射电子显微镜（TEM）、X射线光电子能谱（XPS）和光致发光（PL）对粉末样品进行了检测。当样品中存在Ce3+时，观察到纳米复合粉末在502 nm处的光致发光增强，相比于纯ZnO。当存在Ce4+时，在603 nm处观察到新峰。纳米复合粉末的光致发光增强与Ce3+引起的更多氧空位相关。603 nm处的新峰归因于CeO2/ZnO界面处的新能量跃迁。
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