不同形貌和晶相钨酸铅纳米材料的可控合成及光性能研究

摘要

Using PbAc2 and Na2WO4 as starting materials, various morphologies and phases of PbWO4 nanomaterials were successfully synthesized by simply adjusting nwPb mole ratio at starting materials.When nwPb mole ratio is 1∶3, the product is nanowires with monoclinic phase; when nWPb mole ratio is 1∶1, the product is branch structure with tetragonal phase; when nWPb mole ratio is 3∶2, the product is nanorods with tetragonal phase.The morphologies, phase structures and compositions of the products were characterized by scanning electron microscope (SEM),transmission electron microscope (TEM), X-ray powder diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS).The possible formation mechanism of the products was proposed.PbWO4 nonamaterials display intense blue emission under ultraviolet excitation.%以醋酸铅和钨酸钠为起始原料,只是简单改变起始原料的nwPb比即成功制备出不同形貌和晶相的PbWO4纳米材料.当起始原料nwPb比为1:3,产物为单斜相PbWO4纳米线;nwPb比为1:1时,产物为四方相枝状PbWO4;nwPb比为3:2时,产物为四方相短棒状PbWO4.通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线粉末衍射(XRD)及能量散射仪(EDS)对产物的形貌、物质结构及成分进行了表征.提出了产物可能的形成机制.PbWO4纳米材料在紫外光激发下展现出强的蓝光发射.