Lanthanum and boron co-doped BiVO4 with enhanced visible light photocatalytic activity for degradation of methyl orange

• Published in: Journal of rare earths Vol. 31; no. 9; pp. 878 - 884
• Main Author: 王敏 车寅生 牛超 党明岩 董多
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2013
• Subjects: BiVO4; Boron; Degradation; La-B-codoped; Lanthanum; methyl orange solution; Photocatalysis; photocatalyst; Rare earth metals; rare earths; Scanning electron microscopy; visible light; X-ray photoelectron spectroscopy; X-rays; X-射线衍射仪; X射线光电子能谱; 光催化活性; 光催化降解; 扫描电子显微镜; 掺硼; 掺镧; 甲基橙; La-B-codoped; visible light; methyl orange solution; photocatalyst; BiVO4; rare earths
• ISSN: 1002-0721; 2509-4963
• DOI: 10.1016/S1002-0721(12)60373-1

BiVO4 photocatalysts co-doped with La and B were prepared by sol-gel method using citric acid as chelate. The samples were characterized by X-ray photoelectron spectroscopy （XPS）, X-ray diffraction （XRD）, scanning electron microscopy （SEM）, Bru-mauer-Emmett-Teller （BET）, UV-Vis diffuse reflectance spectra （DRS） and the photocatalytic activity was investigated by photo-catalytic degradation of methyl orange （MO）. The results showed that boron and lanthanum ions incorporated into the lattice of BiVO4, and co-doping led to more surface oxygen vacancies, high specific surface areas, small crystallite size, narrow band gap and intense light absorbance in visible region. And the doped La（III） ions could help the separation of photogenerated electrons. Com-pared with BiVO4 and B-BiVO4, the photocatalytic activity of La-B co-doped BiVO4 was remarkably improved due to the synergistic effects of the co-doped ions. The degradation rate of MO in 60 min was 98.4%when La doping content was 0.05 mol.%, which was much higher than that of pure BiVO4（20%） and B-BiVO4（37%）.