Details

Autor(en) / Beteiligte

• Li, Jun-Qi
• Guo, Zhan-Yun
• Liu, Hui
• Du, Juan
• Zhu, Zhen-Feng

Titel

Two-step hydrothermal process for synthesis of F-doped BiVO4 spheres with enhanced photocatalytic activity

Ist Teil von

• Journal of alloys and compounds, 2013-12, Vol.581, p.40-45

Ort / Verlag

Kidlington: Elsevier B.V

Erscheinungsjahr

2013

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• [Display omitted] •F-doped BiVO4 spheres were synthesized by a simple two step hydrothermal process.•F− ions might restrain the recombination of photogenerated electron–hole pairs.•The as-obtained F-doped BiVO4 spheres exhibit higher photocatalytic activity. F-doped BiVO4 spheres were synthesized by a simple two step hydrothermal process. The effects of F ions on the microstructure and photocatalytic activity of BiVO4 were investigated in detail. The undoped BiVO4 solid spheres with smooth surface are chemically etched by corrosive F− ions, which result in the F-doped BiVO4 spheres with large pores on the surface. The substitution of O2− ions by F− ions could result in the decrease of the BiVO4 lattice parameters, influence the chemical environment surrounding the Bi, V and O elements, cause the red-shifted of the adsorption edge and modify the absorption abilities in visible light region. F-doped BiVO4 spheres exhibited higher photocatalytic activity than undoped BiVO4 under visible light irradiation because an appropriate amount of F− ions introduced into BiVO4 crystal lattice might effectively restrain the recombination of photogenerated electron–hole pairs.