中文摘要：

通过水热法以固体AgNO3为Ag离子来源,成功制备出系列Ag离子改性修饰Bi2WO6复合光催化剂,并采用X射线衍射（XRD）、场发射扫描电子显微镜（FESEM）、X射线光电子能谱仪（XPS）、能谱仪（EDS）和紫外-可见漫反射光谱（DRS）技术对其进行分析表征。研究表明,Ag离子可能取代Bi2WO6中的Bi 3＋离子进入晶格,从而调节了禁带宽度。另一方面,纯Bi2WO6与Ag离子改性修饰Bi2WO6样品均为由纳米片自组装而成的球形结构,直径约为2～6μm。与纯Bi2WO6相比,Ag离子改性修饰Bi2WO6样品的结晶度较高且纳米片的排列也更致密,其光催化活性明显提高。在本文中形貌和能隙的优化是光催化性能提升的主要原因。当AgNO3的投加量为10%（摩尔分数）时,罗丹明B的降解率提高了近42%。

英文摘要：

A series of Ag ions modified Bi2WO6 photocatalyst were synthesized successfully by hydrothermal method with solid silver nitrate and characterized by X-ray diffraction（XRD）,field emission scanning electron microscope（FESEM）,X-ray photoelectron spectrometer（XPS）,energy dispersive X-ray detector（EDS）and UV-Vis diffusion reflectance spectra techniques（DRS）.The result indicated that Ag ions may replace Bi 3＋ ions of bismuth tungstate into the crystal lattice,which regulates the forbidden band width.On the other hand,pure Bi2WO6 and Ag ions modified Bi2WO6 were both ball-like samples self-assembled with nanoplates.Compared with pure Bi2WO6,Ag ions modified Bi2WO6 samples have higher crystallinity and relatively closer arrangement in nanoplates,also more prominent photocatalytic activity.The optimization of morphology and energy gap was the main reason to enhance the photocatalytic performance in this experiment.And the degradation rate of RhB was increased by almost 42% while the quantity of AgNO3 adding content was 10mol%.