Synthesis of BiVO₄/Bi₂VO_5.5 Heterogeneous Nanostructures with Enhanced Visible Light Photocatalytic Activity

Abstract:

BiVO₄/Bi₂VO_5.5 heterogeneous nanostructures with enhanced visible light photocatalytic activity were successfully prepared by a facile one-pot solvothermal method, where diethylene glycol (DEG) was used as the solvent. The as-prepared products were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectrometry (XPS) and UV-Vis absorption spectroscopy. The results revealed that the molar ratio of Bi³⁺ to VO₄^3- played an important role in the formation of crystal and morphology. These BiVO₄/Bi₂VO_5.5 heterogeneous nanostructures exhibited higher visible-light-driven photocatalytic efficiency compared to the pure BiVO₄ and Bi₂VO_5.5. For the methyl orange (MO) degradation efficiency of BiVO₄/Bi₂VO_5.5 heterogeneous nanostructures under visible light irradiation, about 95% of MO was degraded within 40min, which is much higher than pure BiVO₄ and Bi₂VO_5.5. The enhancement of photocatalytic activity can attribute to the promoted light absorption capability and the separation efficiency of photo-generated electron-hole pairs.

• Periodical: Materials Science Forum (Volume 847)
• Pages: 211-217
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.847.211
• Online since: March 2016
• Authors: Jian Min Wang, Feng Cao, Xin Lv, Song Li, Jia Jia Cai, Gao Wu Qin
• Keywords: BiVO₄/Bi₂VO_5.5, Heterogeneous, Photodegradation, Solvothermal

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