To　design　semiconductor-based　photocatalysts　with　efficient　charge　carriers　separation　and　transfer　remains　an　enduring　goal　of　artificial　photosynthesis　toward　target　redox　reactions.　Herein,　we　report　a　cascade　monolith　composite　of　ternary　reduced　graphene　oxide　aerogel/silver　bromide/silver　(RGA/AgBr/Ag)　with　efficient　charge　carriers　separation,　which　exhibits　much　higher　activity　than　bare　AgBr　toward　photocatalytic　bacteria　inactivation.　Mechanistic　studies　reveal　that　the　reduced　graphene　oxide　aerogel　(RGA)　scaffold　and　Ag　nano　particles　serve　as　electron　relay　mediators　to　promote　the　charge　carriers　separation　and　transfer.　In　addition,　the　metallic　Ag　nanoparticles　derived　from　the　photoreduction　of　AgBr　during　the　photocatalytic　disinfection　can　further　boost　the　separation　of　charge　carriers.　Control　experiments　demonstrate　that　the　surface　plasmon　resonance　(SPR)-excited　hot　electrons　of　Ag　nanoparticles　also　contribute　to　enhancing　the　photoactivity　of　RGA/　AgBr/Ag.　As　such,　the　synergy　of　multiple　electron　transfer　behavior　integratively　leads　to　the　boosted　photo　catalytic　performance　of　such　RGA/AgBr/Ag　aerogel　for　bacteria　inactivation　with　convenient　recyclable　operability.