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Silver halide AgX(X = Cl,Br,I)had attracted wide attention for its excellent photocatalytic behaviors in the degradation of organic pollutants,antibiosis and the reduction of carbon [1-3].Unfortunately,the low structural stability of pure AgX(X = Cl,Br,I)strongly limits its applications in the environmental area.In view of the excellent photocatalytic activity and limitations of poor stability,coupling AgX(X = Cl,Br,I)with other photocatalysts could be supposed to a good approach to produce efficient and stable photocatalyts.Moreover,AgX(X = Cl,Br,I)could be a sensitizer to enhance the photoabsorption of composite system in the visible light region.In this work,novel Bi2SiO5/AgI nanosheets were fabricated by in situ wrapping Bi2SiO5 nanosheets with AgI of different proportions(2,1,0.5)through a facile precipitation method.The photocatalytic activities of Bi2SiO5/AgI nanosheets were evaluated by the degradation of ARG solution under visible light irradiation.The photocatalytic activities of the as-prepared Bi2SiO5/AgI nanosheets are much higher than that of pure AgI or Bi2SiO5.Moreover,the as-prepared Bi2SiO5/AgI nanosheets have no distinct losses of photocatalytic activity after four recycles under the visible light irradiation,indicating that the Bi2SiO5/AgI nanosheets have good photocatalytic stability.The excellent photocatalytic activity and good stability of the Bi2SiO5/AgI nanosheets are closely related to the fast transfer and efficient separation of electron-hole pairs at the interfaces of the two semiconductors derived from the matching band positions between Bi2SiO5 and AgI.This newly constructed Bi2SiO5/AgI nanosheets,with promising and fascinating visible light driven photocatalytic activity as well as good stability,have enormous potential applications in environmental purification and solar energy conversion.