Morphology-Controlled Synthesis of Au/Cu2FeSnS4 Core-Shell Nanostructures for Plasmon-Enhanced Photocatalytic Hydrogen Generation
Morphology-Controlled Synthesis of Au/Cu2FeSnS4 Core-Shell Nanostructures for Plasmon-Enhanced Photocatalytic Hydrogen Generation
复制标题
DOI：
10.1021/acsami.5b00715
复制
发表时间：
2015-05-06
影响因子：
9.5
通讯作者：
Wong, Kwok-Yin
中科院分区：
文献类型：
--
作者：
Ha, Enna;Lee, Lawrence Yoon Suk;Wong, Kwok-Yin
地球上储量丰富的元素的铜基硫属化物最近作为太阳能转换的替代材料出现。 Cu2FeSnS4（CITS）是一种受到相对较少关注的四元硫属化物，有潜力开发成低成本、环境友好的光伏和光催化材料。在此，我们首次报道了具有可控形貌的新型Au/CITS核壳纳米结构的合成、表征和生长机制。核壳尺寸的精确操作被证明可以产生两种不同的异质结构，其中具有球形和多足金纳米颗粒 (NP) 核（Au-sp/CITS 和 Au-mp/CITS）。在使用合成的 Au/CITS NP 进行光催化制氢时，CITS 壳内存在 Au 核，导致较高的制氢速率，这可归因于表面等离子体共振 (SPR) 效应。与裸 CITS NP 相比，Au-sp/CITS 和 Au-mp/CITS 核壳 NP 的光催化产氢能力分别提高了约 125% 和 240%。
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.