Polyaniline/Bi　3NbO　7　nanocomposites　were　successfully　prepared　by　a　simple　chemisorption　approach.　Their　particle　sizes　ranged　from　25　to　50　nm.　The　photocatalytic　activities　of　the　as-prepared　samples　for　the　rhodamine　B　degradation　were　evaluated　under　visible　light　(420　nm　≤　λ　≤　760　nm).　The　results　indicated　that　the　samples　exhibited　excellent　photocatalytic　activities　and　high　activity　stabilities　for　the　degradation　of　rhodamine　B.　When　the　loading　amount　of　polyaniline　was　4　wt%,　the　obtained　sample　showed　the　highest　photocatalytic　activity.　Its　photocatalytic　activity　was　also　much　higher　than　that　of　the　reference　sample　(TiO　2-xN　x　powders).　On　the　basis　of　the　experimental　results,　photo-generated　holes　were　detected　as　the　main　oxidation　species　responsible　for　the　decomposition　of　rhodamine　B　over　polyaniline/Bi　3NbO　7.　Furthermore,　the　enhanced　photocatalytic　activity　was　mainly　ascribed　to　the　synergetic　effect　between　polyaniline　and　Bi　3NbO　7.　©　2011　Elsevier　B.V.　All　rights　reserved.