Abstract　β-In2S3　nanocrystals　embedded　in　Nafion　membrane　(β-In2S3/Nafion)　was　synthesized　via　a　facile　wet　chemical　method.　The　microstructures　of　as-prepared　β-In2S3/Nafion　were　characterized　by　means　of　diverse　techniques.　It　is　found　that　Nafion　membrane　can　provide　a　stable　matrix　to　inhibit　the　agglomeration　of　β-In2S3　nanoparticles.　Due　to　the　coupling　effects　between　β-In2S3　NCs　and　Nafion　ionomer　membrane,　the　as-prepared　β-In2S3/Nafion　film　exhibited　excellent　photocatalytic　activity　and　stability　toward　rhodamine　B　degradation　under　visible　light　(≥420　nm).　Furthermore,　this　β-In2S3/Nafion　sample　is　easy　to　handle　and　recycle　for　catalytic　purposes.　©　2015　Elsevier　B.V.