Red-Light-Driven Water Splitting by Au(Core)-CdS(Shell) Half-Cut Nanoegg with Heteroepitaxial Junction,Journal of the American Chemical Society

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Red-Light-Driven Water Splitting by Au(Core)-CdS(Shell) Half-Cut Nanoegg with Heteroepitaxial Junction
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2018-01-19 , DOI: 10.1021/jacs.7b12972
Shin-ichi Naya ₁ , Takahiro Kume ₂ , Ryo Akashi ₂ , Musashi Fujishima ₂ , Hiroaki Tada _{1,

2}

Affiliation

A key material for artificial photosynthesis including water splitting is heteronanostructured (HNS) photocatalysts. The photocatalytic activity depends on the geometry and dimension, and the quality of junctions between the components. Here we present a half-cut Au(core)-CdS(shell) (HC-Au@CdS) nanoegg as a new HNS plasmonic photocatalyst for water splitting. UV-light irradiation of Au nanoparticle (NP)-loaded ZnO (Au/ZnO) at 50 °C induces the selective deposition of hexagonal CdS on the Au surface of Au/ZnO with an epitaxial (EPI) relation of CdS{0001}/Au{111}. The subsequent selective dissolution of the ZnO support at room temperature yields HC-Au@CdS with the Au NP size and EPI junction (#) retained. Red-light irradiation (λex = 640 nm) of HC-Au@#CdS gives rise to continuous stoichiometric water splitting with an unprecedentedly high external quantum yield of 0.24%.

中文翻译：

Au（核）-CdS（壳）半切纳米蛋通过具有异质外延结的红光驱动水分裂

包括水分解在内的人工光合作用的关键材料是异质纳米结构 (HNS) 光催化剂。光催化活性取决于几何形状和尺寸，以及组件之间连接的质量。在这里，我们提出了一种半切割的 Au（核）-CdS（壳）（HC-Au@CdS）纳米蛋作为用于水分解的新型 HNS 等离子体光催化剂。在 50 °C 下对负载 Au 纳米颗粒 (NP) 的 ZnO (Au/ZnO) 进行紫外光照射，诱导六方 CdS 在 Au/ZnO 的 Au 表面选择性沉积，其外延 (EPI) 关系为 CdS{0001}/金{111}。随后在室温下选择性溶解 ZnO 载体，产生 HC-Au@CdS，并保留了 Au NP 尺寸和 EPI 结（#）。

更新日期：2018-01-19

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