The　coupling　of　piezoelectric　effect　and　metal　surface　modification　is　an　effective　way　to　improve　photo　-catalytic　performance.　Herein,　we　prepared　a　new　piezoelectric　heterojunction　catalyst　by　depositing　Cu　nanoparticles　on　the　surface　of　lead-free　Na0.5Bi4.5Ti4O15　(NBT)　piezoelectric　micron-sheets.　Under　the　si-multaneous　excitation　of　light　and　stirring,　NBT@6.4　wt%Cu　photocatalyst　exhibits　excellent　piezo-photo-catalytic　activity,　in　which　the　degradation　rate　of　methyl　orange　(MO)　solution　can　reach　96%　within　120　min,　and　the　rate　constant　kobs　value　is　as　high　as　24.67　x　10-3　min-1,　which　is　similar　to　13　times　larger　than　that　of　pure　NBT　photocatalyst　under　the　excitation　of　light.　The　improved　piezo-photocatalytic　perfor-mance　is　attributed　to　that　the　deposition　of　Cu　nanoparticles　and　the　high　piezoelectric　properties　of　NBT　facilitates　the　transfer　and　separation　of　photogenerated　carriers.　This　work　provides　a　new　option　for　designing　high-performance　piezo-photocatalysts　for　pollutant　treatment.　(c)　2022　Elsevier　B.V.　All　rights　reserved.