炭吸附共沉淀纳米铁酸钐的制备及其可见光催化性能EI北大核心CSCD

采用炭吸附共沉淀法制备铁酸钐(SmFeO 3)纳米粉体。利用热重分析仪(TG-DTA)、X射线衍射仪(XRD)、紫外-可见分光光度计(UV-Vis)和透射电镜(TEM)等分析方法对样品进行表征。以甲基橙(MO)为目标污染物,镝灯为可见光源,研究SmFeO 3纳米粉体的光催化性能。结果表明:炭吸附共沉淀法合成的SmFeO 3粉体粒径小,分布均匀,团聚较少;SmFeO 3的吸收波长发生红移,且SmFeO 3在紫外光、可见光区域的吸收强度增强。炭吸附共沉淀法制得的SmFeO 3粉体在60 min内降解率达到82%,是沉淀法所得SmFeO 3粉体降解率的2.6倍,光催化效果明显增强。

Visible light photocatalytic properties of SmFeO3 powders prepared via carbon adsorption co-precipitation method

SmFeO 3 powders were synthesized by carbon adsorption co-precipitation method.The as-prepared samples were characterized by TG-DTA analysis,X-ray diffraction,UV-Vis absorption spectra and transmission electron microscopy,respectively.The photocatalytic activity of SmFeO 3 powders was investigated under visible light irradiation of dysprosium lamp with methyl orange(MO)as the target pollutant.The results show that SmFeO 3 powders are obtained with less agglomeration,small particle size and uniform distribution due to the addition of carbon black.The absorption wavelength of SmFeO 3 shifts toward the long wavelength and the absorption intensity of SmFeO 3 enhances in the ultraviolet and visible regions.The degradation rate of SmFeO 3 powder prepared by carbon adsorption co-precipitation method reaches 82%within 60 min,which is 2.6 times of samples synthesized by precipitation method.The photocatalytic effects are significantly enhanced.