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首页> 外文期刊>ACS applied materials & interfaces >Morphology-Controlled Synthesis of Au/Cu2FeSnS4 Core-Shell Nanostructures for Plasmon-Enhanced Photocatalytic Hydrogen Generation
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Morphology-Controlled Synthesis of Au/Cu2FeSnS4 Core-Shell Nanostructures for Plasmon-Enhanced Photocatalytic Hydrogen Generation

机译：等离子增强光催化制氢的Au / Cu2FeSnS4核壳纳米结构的形态控制合成

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摘要

Copper-based chalcogenides of earth-abundant elements have recently arisen as an alternate material for solar energy conversion. Cu2FeSnS4 (CITS), a quaternary chalcogenide that has received relatively little attention, has the potential to be developed into a low-cost and environmentlly friendly material for photovoltaics and photocatalysis. Herein, we report, for the first time, the synthesis, characterization, and growth mechanism of novel Au/CITS core-shell nanostructures with controllable morphology. Precise manipulations in the core-shell dimensions are demonstrated to yield two distinct heterostructures with spherical and multipod gold nanoparticle (NP) cores (Au-sp/CITS and Au-mp/CITS). In photocatalytic hydrogen generation with as-synthesized Au/CITS NPs, the presence of Au cores inside the CITS shell resulted in higher hydrogen generation rates, which can be attributed to the surface plasmon resonance (SPR) effect. The Au-sp/CITS and Au-mp/CITS core-shell NPs enhanced the photocatalytic hydrogen generation by about 125% and 240%, respectively, compared to bare CITS NPs.
机译：最近出现了地球上富含稀土元素的铜基硫族化物，作为太阳能转换的替代材料。 Cu2FeSnS4（CITS）是一种受到较少关注的季硫属元素化物，有潜力被开发成一种低成本且对环境友好的材料，用于光伏和光催化。本文中，我们首次报道了形态可控的新型Au / CITS核壳纳米结构的合成，表征和生长机理。核壳尺寸的精确操作被证明可以产生具有球形和多荚金纳米颗粒（NP）核（Au-sp / CITS和Au-mp / CITS）的两种不同的异质结构。在以合成的Au / CITS NPs进行光催化制氢的过程中，CITS壳内部存在Au核导致更高的制氢速率，这可归因于表面等离子体激元共振（SPR）效应。与裸CITS NP相比，Au-sp / CITS和Au-mp / CITS核壳NP分别使光催化氢的产生分别增加了约125％和240％。

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