Preparation of nanocrystalline YbFeO₃ by sol-gel method and its visible-light photocatalytic activities

ABSTRACT

Using Fe(NO₃)₃·9H₂O, Yb(NO₃)₃·5H₂O, citric acid and ethylene glycol as main raw materials, the gel of YbFeO₃ was prepared by sol-gel method. The gel was kept at 100 °C for 36 h to make xerogel. Then, the xerogel was calcined in muffle furnace at 800°C to make YbFeO₃ samples. The structure and morphology of samples were characterized by thermogravimetry and differential scanning calorimetry (TG-DSC), powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy and UV-visible diffuse reflectance spectroscopy (DRS). The results showed that the perovskite structure YbFeO₃ was obtained through sol-gel method. The resulting products have a particle size of 80 nm and an optical band gap of 2.0 eV. Consequently, the YbFeO₃ nanoparticles showed high photocatalytic activities for decomposition of methyl orange under visible-light irradiation.

KEYWORDS:

• Sol-gel method
• YbFeO₃
• visible-light photocatalysis
• methyl orange

Funding

This work was supported by the Academic Leader Programs of Huzhou University for Middle-aged and Young (No.RP23023).