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Ag3PO4/Bi2WO6 composite has been successfully synthesized via a deposition-precipitation process.The visible-light-driven photocatalytic activity of the as-synthesized Ag3PO4/Bi2WO6 composite was evaluated by photodegradation of azo compounds, such as Rhodamine B and ethylene blue.The results indicated that the as-synthesized Ag3PO4/Bi2WO6 shows the excellent visible-light-photocatalytic activity on azo compounds.Also, the experiment indicated that the photocatalytic activity of as-obtained Ag3PO4/Bi2WO6 composite highly depends on more ratio of composite quantity the Ag3PO4 and Bi2WO6.When the more ratio of composite quantity of Ag3PO4 and Bi2WO6 is 1∶1, the as-obtained Ag3PO4/Bi2WO6 composite show the best photocatalytic activity.