Here　we　report　a　facile　hydrothermal　route　for　the　preparation　of　BiOBr-Bi2WO6　mesoporous　nanosheet　composites　(MNCs)　in　the　presence　of　titanium　isopropoxide,　Ti((OPr)-Pr-i)(4).　High　resolution　transmission　electron　microscopy,　X-ray　diffraction,　nitrogen　adsorption/desorption　analysis　and　X-ray　photoelectron　spectroscopy　were　employed　for　structural　and　composition　analyses　of　the　MNCs.　The　photogenerated　charge　transfer　and　photocatalytic　activity　of　BiOBr-Bi2WO6　MNCs　were　investigated　by　Kelvin　probe　force　microscopy　and　UV-vis　spectroscopy.　We　propose　mechanisms　to　illustrate　how　titanium　alkoxide　induces　the　formation　of　mesoporous　nanosheet　heterostructures　and　the　enhanced　photodecomposition　efficiency　of　the　dye　under　low　light　intensity　illumination.　Overall,　our　results　suggest　that　titanium　alkoxide　is　not　only　strongly　involved　in　the　growth　of　BiOBr　(001)　facets,　but　also　plays　a　critical　role　in　the　pore　evolution　of　the　product.　Kelvin　probe　force　microscopy　analysis　allows　us　to　conclude　that　the　resulting　nanocomposites　demonstrate　high　photogenerated　charge　mobility　and　a　long　lifetime.　Dye　molecules　can　be　rapidly　and　thoroughly　decomposed　with　the　photocatalyst　under　very　low　light　intensity　illumination.　The　enhanced　photocatalytic　activity　is　attributed　to　well　matched　band　edge　positions　of　BiOBr　and　Bi2WO6　and　the　large　specific　surface　area　of　the　MNCs　in　view　of　the　incorporation　of　mesopores　and　the　highly　exposed　BiOBr　(001)　facet　due　to　the　use　of　Ti((OPr)-Pr-i)(4)　during　the　synthesis.　The　results　presented　here　are　expected　to　make　a　contribution　toward　the　development　of　delicate　nanocomposites　for　photocatalytic　water　purification　and　solar　energy　utilization.