Abstract
Ag3PO4–Bi2O2CO3 composites were prepared by a combination of hydrothermal technique and precipitation method for the first time. Ag3PO4 nanoparticles with ca. 200nm in size were attached to the surface of Bi2O2CO3 microspheres in diameter of 1–2μm, which had higher photocatalytic activity than Bi2O2CO3 microspheres toward degradation of Rhodamine B (RhB) in water under visible light irradiation. The Ag3PO4–Bi2O2CO3 composite with the molar ratio of Ag3PO4:Bi2O2CO3=1:1 exhibited the highest photodegradation efficiency of RhB (97% in 30min), which was about 2.2 times of pure Bi2O2CO3 microspheres. The enhanced photoactivity could be ascribed to more light harvest and more effective separation of photo-generated electron–hole pairs.
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