首页|Microwave-assisted rapid synthesis of Cu2S:ZnIn2S4 marigold-like nanoflower heterojunctions and enhanced visible light photocatalytic hydrogen production via Pt sensitization
Microwave-assisted rapid synthesis of Cu2S:ZnIn2S4 marigold-like nanoflower heterojunctions and enhanced visible light photocatalytic hydrogen production via Pt sensitization
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NSTL
Elsevier
? 2022 The Korean Society of Industrial and Engineering ChemistryIn this work, a rapid microwave synthesis route is presented for the fabrication of morphology-controlled Cu2S: ZnIn2S4 marigold-like nanoflower heterojunction photocatalysts. The Cu-to-Zn-metal -cation (Cu:Zn) ratios were used to control the Cu2S: ZnIn2S4 heterojunction during the second step of microwave synthesis. The formation of Cu2S: ZnIn2S4 heterojunction is evidenced by XRD, TEM and XPS analyses. The optimum electronic interaction aids to stimulate electron-hole charge separation kinetics and promote the solar hydrogen (H2) evolution performance in microwave-assisted 5 mol.% Cu2S:ZnIn2S4 (Cu2S:ZIS–5) heterojunction. Benefiting from the synergy between marigold-like morphology, heterojunction, and Pt loading, the optimum Pt loaded Cu2S: ZIS–5 marigold nanoflowers (Pt/Cu2S:ZIS–5) exhibited the 862 μmol of photocatalytic H2 production after 3 h under visible light irradiation (≥420 nm). The time-resolved PL spectrum showed more than double carrier lifetime in Pt/Cu2S: ZIS–5 heterojunction (45 ns) than that of Pt/ZIS–15 (20 ns). These visible light-responsive Pt/Cu2S:ZIS marigold-like nanoflower heterojunction shows promising photostability, which would open new opportunities for the development of highly efficient ternary metal-chalcogenide photocatalysts for solar hydrogen generation.
NSTL
Elsevier
