Abstract: Three-dimensional composites of flower-like Bi2WO6 decorated with Ag@AgCl nanoparticles (designated Ag@AgCl/Bi2WO6) were prepared via a simple precipitation method, and were subsequently characterized for structure and performance evalutation by using XRD, UV-Vis, SEM, TEM, EDX, SAED, and photoelectric test. Moreover, the products’ photocatalytic activity was investigated by the degradation reaction of Rhodamine B (RhB) under visible light irradiation. The experimental results confirmed the uniform distribution of Ag@AgCl nanoparticles, with an average particle size of 50 nm, on the surface of Bi2WO6. The Ag@AgCl/Bi2WO6 composites exhibit excellent UV-vis absorption due to the surface plasmonic resonance (SPR) of Ag nanoparticles. Meanwhile, the introduction of Ag@AgCl nanoparticles can greatly accelerate the separation of photogenerated carriers, thus improving the photocatalytic activity of the resultant composite materials. In the photocatalysis test achieved a degradation rate as high as 95% of RhB (250 mL, 10 mg/L) with the presence of 0.25 g Ag@AgCl(20wt%)/Bi2WO6 photocatalyst under visible light irradiation. In addition, it was determined by quenching test that the O2-, h+ and ·OH acts as main active species during the photocatalytic degradation process. Based on the experimental and theoretical results, the possible photocatalytic mechanism was proposed.
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