The　substitution　of　noble　metals　with　cost-effective　copper　nanoparticles　(Cu　NPs)　in　the　preparation　of　metal/semiconductor　composite　catalysts　holds　significant　environmental　and　economic　implications　for　the　degradation　of　various　organic　pollutants.　However,　the　development　of　highly　active　and　stable　Cu　NPs　catalysts　has　emerged　as　a　key　challenge　in　the　progression　of　non-noble　metal　catalysts.　In　this　study,　the　reducibility　of　glutathione　(GSH)　was　employed　to　reduce　Cu2+　to　Cu　NPs,　resulting　in　the　formation　of　stable　Cu-GSH　nanoparticles　through　S-H　bonds.　An　electrostatic　self-assembly　strategy　was　used　to　load　Cu-GSH　onto　WO3　nanorods,　thereby　designing　a　Cu　GSH/WO3　catalytic　material　with　highly　efficient　charge　transport　efficiency.　Under　visible　light　irradiation,　3　wt%　Cu　GSH/WO3　demonstrated　excellent　degradation　performance　for　organic　pollutants,　achieving　the　degradation　of　99.8%　of　Rh　B　and　98.6%　of　TC　within　60　minutes.　Experimental　results　from　photoelectrochemical　(PEC)　and　electron　spin　resonance　(ESR)　analyses　indicated　that　Cu　GSH　functions　as　an　efficient　electron　trap,　which　triggers　electron　flow　driven　by　the　Schottky　barrier,　capturing　the　photoexcited　electrons　from　WO3.　This　greatly　enhances　the　separation　efficiency　of　WO3　carriers　and　extends　the　lifetime　of　the　carriers.　It　is　hoped　that　this　work　will　provide　a　viable　approach　for　the　synthesis　of　new　high-efficiency　composite　photocatalytic　materials.　©　2024　The　Royal　Society　of　Chemistry.