【摘要】 为进一步提高Bi2WO6光催化剂的可见光催化性能,采用水热法制备稀土离子Tb3+掺杂Bi2WO6光催化剂,采用X射线衍射(XRD)、X射线荧光光谱(XRF)、傅里叶红外光谱(FT-IR)、场发射扫描电镜(FESEM)、紫外-可见漫反射光谱(UV-Vis DRS)等手段对样品进行了表征。考察掺杂Tb3+后样品在可见光下降解罗丹明B(Rh B)的光催化性能,研究Tb3+掺杂量对样品光催化性能的影响。结果表明,适当的Tb3+离子对Bi2WO6的掺杂能提高其光催化活性。当Tb3+的掺杂量为0.5mol%时,光催化效果最好,在90 min内,对初始浓度为10 mg/L的Rh B溶液的降解率达98.8%。更多还原

【Abstract】 In order to improve the catalytic properties of the catalyst under visible light,Bi2WO6 composites doped with the different amounts of Terbium have been synthesized by hydrothermal method.The photoactivities of the as-prepared samples under visible light for the degradation of rhodamine-B(Rh-B) were investigated systematically.The obtained samples were characterized by X-ray diffraction(XRD),X-ray fluorescence(XRF),FT-IR spectroscopy,field emission scanning electron microscopy(FESEM),and ultraviolet-visible diffuse reflectance spectroscopy(UV-Vis DRS) in detail.It was found that doping Tb3 +could improve the catalytic properties.The results revealed that 0.5 mol% Tb3 +doping exhibited the highest photochemical activity under visible light irradiation.After visible light irradiation for 90 min,the degradation rate of Rh-B(10 mg / L)reached 98.8%.更多还原