The　pursuit　for　efficient　conversion　of　methane　under　ambient　conditions　remains　a　challenge,　and　the　photocatalytic　splitting　of　water　into　H2　is　a　hot　research　topic　since　H2　is　considered　to　be　the　cleanest　energy.　Here,　the　two　reactions　are　introduced　into　one　photocatalytic　system,　which　achieves　the　simultaneous　utilization　of　photo-induced　electrons　and　holes.　The　mechanism　results　demonstrate　that　photo-induced　electrons　contribute　to　the　production　of　H2,　while　holes　contribute　to　the　conversion　of　CH4.　This　work　provides　a　new　strategy　for　photocatalytic　reactions,　and　provides　considerable　quantum　efficiencies　for　electrons　of　2.83%　(without　a　sacrificial　agent)　and　holes　of　2.76%.　In　view　of　the　closed　values　of　the　quantum　efficiencies　for　the　two　original　photo-induced　species,　it　is　believed　that　the　separated　electrons　and　holes　are　more　effectively　utilized.　©　The　Royal　Society　of　Chemistry　2017.