稀土金属掺杂氧化锌光催化剂的合成与表征

Synthesis and Characterization of Rare Earth Ions Co-doped ZnO

为了提高半导体氧化锌(ZnO)的光催化性能,通过稀土金属铒(Er)和钕(Nd)共掺杂ZnO的方法研究了共掺杂对ZnO内部结构的影响。采用化学沉淀法和溶剂热法合成了不同形貌的ZnO,并通过X射线衍射(XRD),扫描电子显微镜(SEM),紫外-可见漫反射光谱(UV-vis)等表征手段分析掺杂样品结构性质。研究结果显示:溶剂热法合成的ZnO晶粒尺寸较纯ZnO大幅缩小; ZnO共掺杂后有更强的紫外和可见光发射,吸收带边出现红移。稀土元素Er和Nd共掺杂ZnO可以有效提高其光催化降解效率。

In order to improve the photocatalytic performance of zinc oxide(ZnO),the effect of co-doping on the internal structure of ZnO was studied by co-doping ZnO with rare earth ions including Er and Nd.Different morphologies of ZnO were synthesized by chemical precipitation and solvothermal methods.The samples were determined using X-ray diffraction(XRD),scanning electron microscopy(SEM)and UV-visible diffuse reflectance spectroscopy(UV-vis).The results showed thatsizes of ZnO grains prepared by solvent-thermal methodwere much smaller than pure ZnO.After ZnO co-doping,there was stronger ultraviolet and visible light emission,and the absorption band was red shifted.It was concluded that rare earth elements Er and Nd co-doped ZnO could greatly improve the photocatalytic degradation efficiency.