Theconstruction of a heterojunction structure is consideredasignificant route to promote solar-driven H-2 production.Herein, a CDs/ZnIn2S4/Ni-Al LDHs (CDZNA)ternary heterojunction was elaborately constructed via the in situ growth of ZnIn2S4 on Ni-Al LDHs with the incorporation of carbon dots (CDs)cocatalyst, which was used as a highly efficient catalyst for thephotocatalytic H-2 generation. Characterizations indicatedthat 2D ZnIn2S4 nanosheet homogeneously dispersedon the surface of Ni-Al LDHs fabricated an intimate hierarchicalarchitecture and provided a high BET surface area (135.12 m(2) g(-1)). In addition, the unique embeddable-dispersedCDs as electron mediators possessed numerous active sites and promotedthe charge separation on ZnIn2S4/Ni-AlLDHs (ZNA) binary catalyst. By coupling these two features, the CDZNAcatalyst exhibited a considerable H-2 production rate of23.1 mmol g(-1) h(-1) under visible-lightillumination, which was 16.4 and 1.4 times higher than those of ZnIn2S4 and ZNA, respectively. A proposed mechanismof photocatalytic H-2 production over the CDZNA catalystwas also discussed. This work provides a promising strategy to achievehighly efficient solar energy conversion in a ternary photocatalyticsystem. A CDsZNA ternary catalyst withintimate interfacial contactand rapid charge transfer indicated enhanced photocatalytic hydrogenevolution.
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