Algal　blooms　have　become　a　widespread　concern　for　drinking　water　production,　threatening　ecosystems　and　human　health.　Photocatalysis,　a　promising　advanced　oxidation　process　(AOP)　technology　for　wastewater　treatment,　is　considered　a　potential　measure　for　in　situ　remediation　of　algal　blooms.　However,　conventional　photocatalysts　often　suffer　from　limited　visible-light　response　and　rapid　recombination　of　photogenerated　electron-hole　pairs.　In　this　study,　we　prepared　a　Z-scheme　AgBr/NH2-MIL-125(Ti)　composite　with　excellent　visible　light　absorption　performance　using　co-precipitation　to　efficiently　inactivate　Microcystis　aeruginosa.　The　degradation　efficiency　of　AgBr/NH2-MIL-125(Ti)　for　chlorophyll　a　was　98.7　%　after　180　min　of　visible　light　irradiation,　significantly　surpassing　the　degradation　rate　efficiency　of　AgBr　and　NH2-MIL-125(Ti)　by　factors　of　3.20　and　36.75,　respectively.　Moreover,　the　removal　rate　was　maintained　at　91.1　%　even　after　five　times　of　repeated　use.　The　experimental　results　indicated　that　superoxide　radicals　(•O2-)　were　the　dominant　reactive　oxygen　species　involved.　The　photocatalytic　reaction　altered　the　morphology　and　surface　charge　of　algal　cells,　inhibited　their　metabolism,　and　disrupted　their　photosynthetic　and　antioxidant　systems.　In　conclusion,　this　study　presents　a　promising　material　for　the　application　of　photocatalytic　technology　in　algal　bloom　remediation.　©　2024　Elsevier　B.V.