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采用均匀沉淀法,用Zn(Ac)2·2E2O为原料,KOH为沉淀剂,制备出ZnO量子点,再由Cu(Ac)2·H2O水解形成的CuO对ZnO表面进行修饰。用透射电镜、X射线衍射、紫外-可见光光度计、荧光等手段表征、分析了经过表面修饰的ZnO的形貌、粒度、衍射图谱、吸收光谱和荧光光谱,并考察了时间和反应物浓度等反应条件对ZnO表面修饰的影响。结果表明:所制备的ZnO平均粒径约为4nm,在水浴16h后CuO对ZnO的修饰效果趋于稳定,修饰后在ZnO颗粒包覆了CuO,阻止了ZnO颗粒的进一步长大,CuO表面修饰使ZnO可见发射强度大大降低。
Abstract：ZnO quantum dots were synthesized by a precipitation method and using Zn(Ac)2·2H2O as the starting material, and KOH as the precipitant. Then the nanoparticles were modified by the CuO obtained by the hydrolysis of Cu(Ac)2·H2O. The samples were characterized by transmission electron microscopy, X-ray diffraction, ultraviolet-visible spectrophotometry, and photoluminescence spectrum techniques. The results show that the ZnO quantum dots are well dispersed, and the average particle size is about 4 nm. The effect of modification tended to become stable after 16 h of heating. It is verified that the ZnO quantum dots are capped with CuO and the modification can restrain the growth of ZnO. It was also observed that the intensities of green bands decreased when the ZnO is modified.
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基本信息:
DOI：
中图分类号:TN304
引用信息:
[1]郭幸,曾大文,谢长生等.CuO表面修饰ZnO量子点及其光学性能[J].硅酸盐学报,2006(06):679-683.
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