ZnS/PbS核壳结构微球的制备和表征

用简单两步法制备ZnS/PbS核壳结构复合微球,采用SEM、EDS、TEM、XRD、FT-IR和固体紫外等测试手段对核壳结构复合微球样品进行性能表征,发现所得复合微球由ZnS核和PbS壳构成,其平均粒径约为8μm;而且具有中空结构的ZnS微球表面被很多细小的PbS颗粒包覆形成核壳结构。UV-vis表明ZnS/PbS核壳结构复合微球在紫外-可见光区都有良好的吸收,说明其在光电器件领域中将会有很好的发展前景。另外,还探讨了复合微球形成的机理。

Preparation and Characterization of ZnS/PbS Core-shell Structure Composite Microspheres

ZnS/PbS core- shell structure composite microspheres have been prepared through a simple two -step method. The samples were characterized by SEM, EDS, TEM, XRD, FF - IR and UV - vis. The results show that ZnS core and PbS shell constituted the hollow structure ZnS/PbS composite microspheres, the average particle size is about 8p.m. The results also show that the surface of the ZnS hollow microspheres have been coated by a lot of small PbS particles, which constitute the core - shell structure. UV - vis shows that the ZnS/PbS core - shell structure composite microspheres have good absorption in UV and visible light region, which indicates that the composite microspheres will have a good development in the field of photoelectric devices. In addition, preliminary study has been made for the mechanism of composite microspheres.