Delafossite-structured　oxides　AgMO2　(M　=　Al,　Ga,　In)　were　successfully　synthesized　using　fluoro(ethylene-propylene)　(FEP)　pouch　via　a　facile　hydrothermal　method.　The　obtained　samples　were　characterized　by　X-ray　diffraction　(XRD),　BET　surface　area　measurement,　UV-vis　diffuse　reflectance　spectroscopy　(DRS),　scanning　electron　microscopy　(SEM)　and　X-ray　photoelectron　spectroscopy　(XPS).　The　photocatalytic　activity　of　the　as-prepared　samples　was　evaluated　by　the　degradation　of　rhodamine　B　(RhB)　and　methyl　orange　(MO)　under　visible　light　irradiation.　All　three　samples　showed　photocatalytic　activity　for　RhB　and　MO　degradation　under　visible　light　irradiations　and　their　photocatalytic　activity　followed　the　order　of　AgInO2　＞　AgGaO2　＞　AgAlO2.　The　relative　high　photocatalytic　activity　of　AgInO2　can　be　attributed　to　its　high　quantity　of　the　surface　hydroxyl　groups.　The　photocatalytic　mechanism　of　AgInO2　was　proposed　and　its　stability　was　also　investigated.　(C)　2009　Elsevier　B.V.　All　rights　reserved.