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采用柠檬酸络合法于600℃煅烧2h合成了钙钛矿型La1-xNdxFeO3(x=0,0.05,0.10,0.15,0.20,0.25)纳米光催化剂,并利用X射线能谱(EDS)、热重-差热(TG-DTA)、X射线衍射(XRD)、扫描电镜(SEM)以及紫外可见漫反射吸收光谱(UV-VisDRS)等技术进行了表征,以次甲基蓝为目标降解物、以荧光灯模拟可见光源考察了Nd掺杂量对其可见光催化活性的影响.结果表明,Nd已经掺入LaFeO3晶体中,Nd的最佳掺杂量为x=0.1.La0.9Nd0.1-FeO3光催化剂可将次甲基蓝1h降解率由未掺杂的56.0%提高到80.4%,这是由于掺杂后粉体粒径由20.2nm减小到16.9nm,表面原子比例增加以及掺杂后纳米粉体在可见光区的吸收增强所致.
The perovskite-type La1-xNdxFeO3 (x = 0,0.05,0.10,0.15,0.20,0.25) nanometer photocatalyst was synthesized by citric acid complexation method and calcined at 600 ℃ for 2h. X-ray energy dispersive spectroscopy (EDS) TG-DTA, X-ray diffraction (XRD), scanning electron microscopy (SEM) and ultraviolet-visible diffuse reflectance absorption spectroscopy (UV-VisDRS) The effect of Nd doping on visible light photocatalytic activity was investigated by fluorescence simulation of visible light source.The results show that Nd has been doped into LaFeO3 crystal and the optimal doping amount of Nd is x = 0.1.La0.9Nd0.1-FeO3 light The catalyst could improve the degradation rate of methine blue 1h from 56.0% to 80.4%, which is due to the decrease of the particle size after doping from 20.2nm to 16.9nm, the increase of surface atomic ratio and the doping nano-scale Powder absorption in the visible region due to increased.