To　explore　the　relationship　between　semiconductor　structure　and　plasmonic　noble　metal　nanoparticles　(NPs)　property　is　crucial　for　developing　highly　efficient　visible　light　driven　photocatalyst.　Here,　dendritic　α-Bi2O3/Bi2O2CO3　biphasic　heterostructures　were　first　synthesized　by　a　facile　and　low-cost　phase　transformation　method.　Then,　plasmonic　Au　NPs　(including　Au　nanospheres　(NSs,　~30nm))　and　Au　nanorods　(NRs,　~20,　~30,　and　~35nm)　were　loaded　onto　the　α-Bi2O3/Bi2O2CO3　heterostructure.　The　results　revealed　that　these　α-Bi2O3/Bi2O2CO3　heterostructures　exhibited　much　higher　visible-light　photocatalytic　activities　than　α-Bi2O3　for　dye　degradation.　More　importantly,　compared　to　plain　α-Bi2O3/Bi2O2CO3　heterostructures,　loading　of　Au　NSs　brought　~4　times　increase　in　activity　and　Au　NRs　5-11　times　depending　on　nanorods　size.　The　significant　boosting　of　activity　is　attributed　to　the　large　enhancement　of　charge　separation　by　the　formation　of　α-Bi2O3/Bi2O2CO3　interface　and　more　production　of　OH　radicals　by　Au　NSs　or　Au　NRs.　The　surface　plasmon　resonance　(SPR)　absorption　of　these　gold　NPs　on　the　α-Bi2O3/Bi2O2CO3　heterostructures　could　also　have　significant　contribution　to　the　activities　due　to　their　strong　plasmonic　near-fields.　This　work　demonstrates　that　tailoring　the　semiconductor　substrate　structure　and　the　plasmonic　noble　metal　NPs　properties　should　constitute　a　promising　strategy　for　the　design　efficient　solar　energy　driven　photocatalytic　materials.　©　2015　Elsevier　B.V..