Graphene　aerogel　has　attracted　great　attention　due　to　its　unique　properties　in　solar　vapor　generation　for　water　purification　and　desalination.　However,　many　challenges　remain　in　promoting　their　development　and　practical　application,　such　as　scalable　fabrication　and　facile　use　in　a　large　area　of　water.　Herein,　we　report　a　simple　self-assembly　approach　to　prepare　onion-like　graphene　aerogel　beads　on　a　millimeter　scale.　The　floatable,　low-density　graphene　aerogel　beads　are　used　to　promote　water　evaporation　under　non-concentrated　illumination　for　the　first　time.　MoS2　microflakes　with　a　strong　light　absorption　capability　in　the　visible　and　near-infrared　regions　are　incorporated　to　form　hybrid　beads　with　a　much　enhanced　water　evaporation　performance.　A　record　steam　generation　efficiency　of　74%　is　obtained　under　illumination　of　only　0.5　kW　m(-2)　with　a　single　layer　of　hybrid　beads,　corresponding　to　a　remarkable　evaporation　rate　of　0.54　kg　m(-2)　h(-1).　When　scaled　up　to　a　0.05　m(2)　active　area　in　a　home-made　solar　water　still　for　use　in　an　outdoor　environment,　the　hybrid　beads　are　easily　dispersed　on　the　water　surface　by　self-spreading　action.　Their　freshwater　generation　rate　is　about　2.0　L　m(-2)　day(-1)　on　a　typical　spring　day　in　Hong　Kong,　which　is　sufficient　to　satisfy　the　daily　drinking　needs　of　a　person.　By　simultaneously　addressing　both　the　requirements　of　high-efficiency　operation　and　facile　fabrication,　the　graphene　aerogel　beads　developed　in　this　study　may　offer　a　viable　solution　for　drinking　water　problems　in　water-stressed　regions.