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以Na3VO4.12H2O,AgNO3和Y(NO3)3.6H2O为原料,采用浸渍法制备了Y2O3/Ag3VO4复合可见光催化剂,并用XRD,SEM,XPS,UV-Vis等测试手段表征了试样的结构和性能。结果显示,Y2 O3/Ag3VO4复合可见光催化剂为单斜结构,Y以Y2 O3的形式分散在Ag3VO4晶体的表面。UV-Vis测试结果表明,Y2O3/Ag3VO4较纯Ag3VO4吸收带边发生了红移,在可见光区的吸收增强;以金属卤灯(波长大于400 nm)为光源,研究了Y2O3/Ag3VO4催化剂对甲基橙(MO)的可见光催化降解性能。结果发现,Y2O3/Ag3VO4复合可见光催化剂的光催化活性较纯Ag3VO4均有大幅提高,其中Y掺杂量为4%时活性最高。
Y2O3 / Ag3VO4 composite visible light catalysts were prepared by impregnation method using Na3VO4.12H2O, AgNO3 and Y (NO3) 3.6H2O as raw materials. The structure and properties of the samples were characterized by XRD, SEM, XPS and UV-Vis. The results show that the Y2 O3 / Ag3VO4 composite visible light catalyst is of monoclinic structure, and Y is dispersed on the surface of Ag3VO4 crystal as Y2 O3. UV-Vis test results show that Y2O3 / Ag3VO4 is more red-shifted than the pure Ag3VO4 absorption band, and the absorption in the visible region is enhanced. Metal halide (wavelength greater than 400 nm) Visible light photocatalytic degradation of orange (MO). The results showed that the photocatalytic activity of Y2O3 / Ag3VO4 composite photocatalyst was significantly higher than that of pure Ag3VO4, and the activity of Y2O3 / Ag3VO4 composite photocatalyst was the highest when it was 4%.