以氧化锌(ZnO)和二氧化钛(TiO2)为原料,采用固相反应法制备了掺杂不同Ti4+摩尔分数(x)的ZnO复合粉体.ZnO复合材料在经过温度为500℃,时间为3h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ZnO复合材料都保持了ZnO的纤锌矿晶体结构,而过量Ti的掺杂则会降低ZnO的结晶度.另外,ZnO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ZnO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ZnO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,TiO2能很好的融入到ZnO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.
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