类双塔状钨酸铅微晶的无模板合成及光致发光性质

Template-free synthesis and photoluminescence of double-tower-like lead tungstate

在没有任何表面活性剂存在的条件下,通过简单的共沉淀法和低温水热法相结合制得新颖的类双塔状且表面带有阶梯形位错结构的钨酸铅晶体。样品经X射线粉末衍射(XRD)和扫描电镜(SEM)表征。荧光分析(PL)表明样品在428nm和510nm处分别有蓝、绿发射峰。对类双塔状钨酸铅微晶的生长机理进行了讨论。

The double-tower-like Lead tungstate （PbWO4） with step-like dislocation on the surface have been successfully synthesized via a simple coprecipitation accompanying low-temperature hydrothermal method in the absence of soft template （surfactant） . The obtained samples are characterized by means of X-ray powder diffraction （XRD） and field emission scanning electron microscopy （FE-SEM）. The luminescence of the samples is examined by photolumineseence （PL）o The possible formation mechanism of the double-tower-like PbWO4 is discussed.