To　optimize　the　performance　of　photocatalytic　H2　production,　many　effective　methods　have　been　developed,　such　as　controlling　morphology,　designing　synergetic　reaction,　and　enhancing　the　utilization　of　photogenerated　charge　carriers　(PCCs).　In　this　work,　an　efficient　CoMoO4/Zn0.3Cd0.7S　(CMO/ZCS)　photocatalyst　with　p-n　heterojunction　was　constructed　by　incorporating　Zn0.3Cd0.7S　(ZCS)　nanoparticles　into　CoMoO4　(CMO)　microflowers.　Although　CMO　had　limited　activity　in　H2　production　under　visible　light　irradiation,　it　could　largely　boosting　the　H2　production　efficiency　of　ZCS　nanoparticles　by　oxidizing　p-chlorobenzyl　alcohol　(Cl-PhCH2OH)　in　organic　solvent.　In　the　CMO/ZCS　composites,　the　best　rates　of　H2　and　Cl-PhCHO　reached　34.28　and　35.87　mmol　g−1　h−1,　respectively.　The　p-n　heterojunction　formed　between　CMO　and　ZCS　may　be　the　main　enhanced　reason　of　the　excellent　performance,　as　it　could　effectively　improve　the　separation,　transfer　and　utilization　of　PCCs.　The　design　of　the　CMO/ZCS　catalyst　not　only　optimizes　the　migration　and　utilization　of　PCCs,　but　also　provides　crucial　theoretical　guidance　and　experimental　insights　for　the　development　of　highly　efficient　photocatalysts.　©　2024　Hydrogen　Energy　Publications　LLC