【摘要】 采用水热法合成了花球状的Bi2WO6和介孔碳CMK-3/Bi2WO6的光催化剂,然后通过光还原得到了Ag负载的Ag/Bi2WO6和Ag-CMK-3/Bi2WO6,制备出可见光下具有高活性的光催化剂。利用紫外-可见漫反射光谱(UV-Vis DRS)、X射线衍射(XRD)、透射电子显微镜(TEM)、高分辨透射电子显微镜(HR-TEM)和扫描电子显微镜(SEM)对制备的样品进行表征,评价样品在可见光照射下降解亚甲基蓝(MB)的光催化活性。并研究了CMK-3和Ag负载在Bi2WO6上都能提高其光催化活性的机制。结果表明:CMK-3或Ag负载在Bi2WO6上都能大幅提高Bi2WO6的光催化活性,Ag-CMK-3/Bi2WO6光催化剂的光催化性能优于Ag/Bi2WO6和CMK-3/Bi2WO6光催化剂。更多还原

【Abstract】 Flower sphere-like Bi2WO6 and mesoporous carbon CMK-3/Bi2WO6 photocatalysts were synthesized by hydrothermal method,and then Ag/Bi2WO6 and Ag/CMK-3/Bi2WO6 were prepared via a photoreduction process in order to obtain the photocatalysts with high visible light activities.The as-prepared samples were characterized by ultraviolet-visible diffuse reflectance spectroscopy(UV-Vis DRS),X-ray diffraction(XRD),transmission electron microscope(TEM),high resolution transmission electron microscope(HR-TEM)and scanning electron microscope(SEM).The photocatalytic activities of the samples were evaluated by the photodegradation of methylene blue(MB)under visible light irradiation.The mechanism for the enhancement of the photocatalytic activity of CMK-3and Ag-loaded Bi2WO6 was also investigated.The results show that CMK-3or Ag loading greatly improves the photocatalytic activity of Bi2WO6,the photocatalytic activity of Ag/CMK-3/Bi2WO6 photocatalyst is superior to the activities of CMK-3/Bi2WO6 and Ag/Bi2WO6 photocatalysts.更多还原