Ti^(4+)掺杂ZnO复合材料的制备及其光学性能研究  

Preparation and Optical Properties of Ti^(4+)-Doped Zn O Composite

作　　者：吕宝华[1] 李玉珍[2] 宋维阳 姚陈忠[1] 

机构地区：[1]运城学院应用化学系,山西运城044000 [2]运城学院机电公共实验中心,山西运城044000

出　　处：《稀有金属》2014年第6期1055-1059,共5页Chinese Journal of Rare Metals

基　　金：国家青年科学基金项目(51101138)资助

摘　　要：以氧化锌(Zn O)和二氧化钛(Ti O2)为原料,采用固相反应法制备了掺杂不同Ti4+摩尔分数(x)的Zn O复合粉体。Zn O复合材料在经过温度为500℃,时间为3 h的煅烧之后,通过X射线衍射仪(XRD)、拉曼光谱仪、紫外-可见(UV-Vis)吸收光谱仪、红外光谱仪(IR)和扫描电镜(SEM)对复合材料的结构和光学性能进行了表征。研究结果表明,所有的Zn O复合材料都保持了Zn O的纤锌矿晶体结构,而过量Ti的掺杂则会降低Zn O的结晶度。另外,Zn O复合材料的光学性能因为Ti的掺杂有了很大的改变。复合材料在IR图中的Zn-O的特征吸收峰位置与纯Zn O相比出现了明显的蓝移,且吸收峰随着Ti掺杂浓度的增大而逐渐变宽。与此同时,复合材料的UV-Vis吸光度较纯Zn O显著下降,但禁带宽度随着Ti掺杂浓度的增大而明显增大。当Ti掺杂摩尔分数x=20.17%时,Ti O2能很好的融入到Zn O粉体中,且粉体晶粒较小,结晶质量高,界面颗粒接触比较紧密。With zinc oxide（ Zn O） and titanium dioxide（ Ti O2） as raw materials,Zn O composite powders with different Ti^4 ＋-doped mol fractions（ x） were prepared by the solid-state reaction. After calcined at 500 ℃ for 3 h,the structure and optical properties of the composite materials were characterized by X-ray diffraction（ XRD）,Raman spectrometer,ultraviolet-visible（ UV-Vis） absorption spectrometer,infrared（ IR） spectrometer and scanning electron microscopy（ SEM）. The results showed that all the Zn O composites kept the wurtzite crystal structure of Zn O,but excessive Ti doping could decrease the crystallinity of Zn O. In addition,the optical properties of Zn O composite changed a lot because of Ti doping. Compared with pure Zn O,the Zn-O absorption peaks of the composite materials exhibited a blue-shift in the IR spectrum,and became wider gradually with the increase of Ti-doped concentration. At the same time,the absorbance of UV-Vis decreased significantly,but the width of band gap increased obviously with the increase of Ti-doped concentration. When the Ti-doped mol fraction（ x） was 20. 17%,the Ti O2 could dope into Zn O crystal very well,the grain size of powder became smaller,the crystalline quality became higher,and the interfacial particles contacted with each other closely.

关 键 词：氧化锌 钛掺杂 固相反应法 光学性能 

分 类 号：TB331[一般工业技术—材料科学与工程]