Abstract A series of Bi3+-doped CeO2 photocatalysts have been prepared using simple coprecipitation method. The effect of Bi3+ doping on structural surface morphology and optical properties of the prepared photocatalysts was characterized using diffuse reflectance spectroscopy (DRS), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) for determination of the specific surface area and porosity. All prepared photocatalysts exhibit fluorite-type structure with no phase change up to 10 mol percent Bi3+ doping when calcinated at 973 K for 1 h. A red shift in optical band gap measurements was observed with increasing Bi3+ ion percent doping. Photocatalytic performance of prepared photocatalysts were examined using visible-light-induced photocatalytic reduction of 4-nitroaniline to p-phenylenediamine. The highest photocatalytic efficiency was achieved using CeO2 photocatalyst with 5 mol percent Bi3+ doping.

中文翻译：

---

Bi3+掺杂二氧化铈的带隙能移和光催化性能研究

摘要 采用简单的共沉淀法制备了一系列Bi3+掺杂的CeO2光催化剂。使用漫反射光谱 (DRS)、粉末 X 射线衍射 (PXRD)、扫描电子显微镜 (SEM)、Brunauer-Emmett-Teller (BET) 表征 Bi3+ 掺杂对制备的光催化剂的结构表面形貌和光学性能的影响用于测定比表面积和孔隙率。当在 973 K 下煅烧 1 小时时，所有制备的光催化剂都表现出萤石型结构，在掺杂高达 10 mol% Bi3+ 时没有相变。随着 Bi3+ 离子掺杂百分比的增加，观察到光学带隙测量的红移。使用可见光诱导光催化将 4-硝基苯胺还原为对苯二胺来检查制备的光催化剂的光催化性能。