Three-dimensional　graphene　(3DG)　is　promising　for　constructing　monolithic　photocatalysts　for　solar　energy　conversion.　However,　the　structure-associated　light-shielding　effect　and　the　intricate　porous　architecture　of　3DG　result　in　intrinsic　limitations　in　light　penetration　and　mass　transfer　over　3DG　supported　hybrids,　which　restricts　their　photocatalytic　efficiency.　Here,　taking　3DG-organic　hybrids　as　examples,　we　report　a　geometry　regulation　strategy　to　minimize　such　structural　restrictions,　which　not　only　favors　the　interaction　between　light　and　the　photoactive　component,　but　also　facilitates　reactant　adsorption　over　the　3DG-organic　hybrids,　thereby　cooperatively　boosting　their　photoactivity.　Such　an　adaptive　geometry　regulation　strategy　is　expected　to　guide　the　rational　utilization　of　3DG　to　construct　high-performance　hybrids　for　photoredox　catalysis.　©　The　Royal　Society　of　Chemistry.