Graphene　based　photothermal　materials　show　great　promise　in　solar　steam　generation　for　seawater　desalination　and　wastewater　purification.　However,　the　facile　and　green　fabrication　of　efficient　graphene　aerogel　light　absorber　remains　a　challenge.　Here　we　demonstrate　the　eco-friendly　preparation　of　tannic　acid　modified　graphene　as　solar-to-thermal　material　through　electrochemical　exfoliation　and　subsequent　sonication　procedure.　The　as-prepared　aerogel　exhibits　good　photothermal　effect　and　high　solar-to-evaporation　efficiency.　By　cross　linking　with　ferric　ion,　a　more　efficient　ferric　ion-polyphenol-graphene　complex　aerogel　was　developed　to　construct　the　high-performance　solar　vapor　generation　device.　The　defect-free　structure　of　exfoliated　graphene　and　ferric　ion-polyphenol　complex　contributed　to　the　high　evaporation　rate　of　1.3　kg　m(-2)　h(-1)　and　energy　efficiency　of　86.3%　under　one　sun　illumination.