Ag/BiVO₄/Mn1-xZnxFe₂O₄ was synthesized with a dip-calcination in situ synthesis method. This work was hoped to provide a simple method to synthesis three-phase composite. The phase structure, optical properties and magnetic feature were confirmed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectrometer (XPS), transmission electron microscopy (TEM), ultraviolet-visible diffuse reflectance spectrophotometer (UV-vis DRS), and vibrating sample magnetometer (VSM). The photocatalytic activity was investigated by Rhodamine B (RhB) photo-degradation under visible light irradiation. The photo-degradation rate of RhB was 94.0~96.0% after only 60 min photocatalytic reaction under visible light irradiation, revealing that it had an excellent visible-light-induced photocatalytic activity. In the fifth recycle, the degradation rate of Ag/BiVO₄/Mn1-xZnxFe₂O₄ still reached to 94.0%. Free radical tunnel experiments confirmed the dominant role of •O₂⁻ in the photocatalytic process for Ag/BiVO₄/Mn1-xZnxFe₂O₄. Most importantly, the mechanism that multifunction Ag could enhance photocatalytic activity was explained in detail.
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Xie et al. (2018) studied this question.
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