A　2D/2D　Z-scheme　La2NiO4/g-C3N4　heterojunction　was　favorably　created　with　a　2D　La2NiO4　perovskite　and　g-C3N4　nanosheet　through　a　calcination　route.　Notably,　the　photocatalytic　activities　of　all　La2NiO4/g-C3N4　hybrids　can　be　found　to　have　effectively　increased　over　that　of　pure　La2NiO4　or　g-C3N4　especially　when　a　noble　metal　was　not　used　as　a　cocatalyst.　Particularly,　when　the　mass　fraction　of　La2NiO4　was　3　wt　%,　the　photocatalytic　hydrogen　generation　rate　of　the　La2NiO4/g-C3N4　composite　was　the　highest,　which　was　53.8　and　43.9　times　that　of　bare　La2NiO4　and　g-C3N4,　respectively.　The　Z-scheme　heterojunction　was　found　to　effectively　improve　the　catalytic　ability　by　enhancing　the　photoinduced　charge　carrier　migration　efficiency,　as　well　as　both　the　oxidation　and　reduction　capabilities.　Our　work　should　be　of　value　for　designing　highly　efficient　and　visible　light-responsive　heterojunction　photocatalysts　free　of　the　noble　metal　cocatalysts.　©