Citation: ZHAO Di, ZHANG Bo, DUAN Zhao-Juan, LI Ai-Chang. Ag2S/Ag3PO4/Ni Thin Films: Preparation and Photocatalytic Activity for Rhodamine B[J]. Chinese Journal of Inorganic Chemistry, ;2016, 32(12): 2158-2164. doi: 10.11862/CJIC.2016.276
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Ag2S/Ag3PO4/Ni composite thin films were prepared by electrochemical method. The surface morphology, phase structure, optical characteristics and band structure of the thin film were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), respectively. Its photocatalytic properties and stability were evaluated with rhodamine B (RhB) as a model compound. Using a method of adding active species scavenger to the solution, mechanism of photocatalytic degradation of the film was explored. The results show that the Ag2S/Ag3PO4/Ni thin film is composed of uniform spherical nanoparticles. The photocatalytic activity of the as-prepared Ag2S/Ag3PO4/Ni thin film was higher than those of pure Ag3PO4/Ni thin film and Ag2S/Ni thin film respectively. The film maintains nearly 100% of their corresponding initial photocatalytic activity after 6 cycles. Furthermore, the photodegradation mechanism of the composite films for RhB under the visible light was preliminary proposed.
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