College of Environmental and Chemical Engineering, Shenyang Ligong University, Shenyang 110165, China.
J Hazard Mater. 2013 Nov 15;262:447-55. doi: 10.1016/j.jhazmat.2013.08.063. Epub 2013 Sep 1.
Eu-B co-doped BiVO4 visible-light-driven photocatalysts have been synthesized using the sol-gel method. The resulting materials were characterized by a series of joint techniques, including XPS, XRD, SEM, BET, and UV-vis DRS analyses. Compared with BiVO4 and B-BiVO4 photocatalysts, the Eu-B-BiVO4 photocatalysts exhibited much higher photocatalytic activity for methyl orange (MO) degradation under visible light irradiation. The optimal Eu doping content is 0.8 mol%. It was revealed that boron and europium were doped into the lattice of BiVO4 and this led to more surface oxygen vacancies, high specific surface areas, small crystallite size, a narrower band gap and intense light absorbance in the visible region. The doped Eu(III) cations can help in the separation of photogenerated electrons. The synergistic effects of boron and europium in doped BiVO4 were the main reason for improving visible light photocatalytic activity.
Eu-B 共掺杂 BiVO4 可见光驱动光催化剂采用溶胶-凝胶法合成。采用 XPS、XRD、SEM、BET 和 UV-vis DRS 分析等一系列联合技术对所得材料进行了表征。与 BiVO4 和 B-BiVO4 光催化剂相比，Eu-B-BiVO4 光催化剂在可见光照射下对甲基橙（MO）的降解表现出更高的光催化活性。最佳 Eu 掺杂含量为 0.8 mol%。结果表明，硼和铕被掺杂到 BiVO4 的晶格中，这导致更多的表面氧空位、高比表面积、小晶粒尺寸、更窄的带隙和在可见光区域的强烈光吸收。掺杂的 Eu(III) 阳离子有助于光生电子的分离。掺杂 BiVO4 中硼和铕的协同作用是提高可见光光催化活性的主要原因。
