铜掺杂氧化锌纳米颗粒的制备及其室温拉曼光谱  

Preparation of the Cu-doped ZnO Nano-particles and the Room-temperature Raman Spectrum

作　　者：文军[1] 

机构地区：[1]渭南师范学院物理与电气工程学院,陕西渭南714000

出　　处：《河北师范大学学报（自然科学版）》2013年第4期364-368,共5页Journal of Hebei Normal University：Natural Science

基　　金：陕西省教育厅科研计划(08JK287);渭南师范学院科研基金(11YKF017)

摘　　要：通过溶胶-凝胶法制备了Cu掺杂ZnO,采用XRD研究了样品结构,测试了样品的室温拉曼散射特性.XRD分析表明,Cu掺入了ZnO晶格中,掺杂没有改变ZnO六方纤锌矿结构,所制备的样品为纳米多晶粉态,Cu以替位原子的形式存在于ZnO晶格中.Cu掺杂ZnO的晶化程度与焙烧温度有关,合理的焙烧温度为600℃.室温拉曼光谱显示:Cu掺杂ZnO具有与纯ZnO相同的A1,B1,E1,E2等晶格振动模.随着Cu掺杂浓度的增加,晶格畸变,应力增加,点缺陷增多,拉曼谱峰宽化,峰强度减小,晶粒细化,晶化程度降低.由于Cu掺入ZnO晶格,产生了其他不具有拉曼活性的新模式,在拉曼光谱中反映不出来.The Cu-doped ZnO nano-particles were prepared by sol-gel method.The structure of the samples was investigated through X-ray diffraction,and their Raman scatting spectra.The XRD analysis indicated that Cu-doped into the lattice of ZnO,while the ZnO wurtzite structure is not changed.The samples were nano-polycrystal.The Cu atoms were located in ZnO lattice as substitutional atoms.The crystallization degree of the Cu doped ZnO nano-particles is related with calcination temperature.The optimized temperature is 600 ℃ in our experiments.Room-temperature Raman spectrum revealed that the Cu-doped ZnO nano-particle has the same lattice vibrational modes as those of pure ZnO,suchas A1,B1,E1,E2,etc.With the increasing of Cu-doping concentration,the lattice distorted,and stress in crystal strengthened and point defects increased.The peaks in Raman spectrum broadened and the intensity of the peaks decreased which show that.The size of crystal grains reduced as the Cu-doping concentration increased.In lattice of the Cu-doped ZnO nano-particles,there may be also some Raman inactive modes which can’t be reflected in Raman spectrum.

关 键 词：Cu掺杂ZnO 溶胶-凝胶 X线衍射 拉曼散射 

分 类 号：O484[理学—固体物理] TN30[理学—物理]