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首页> 外文期刊>ACS Sustainable Chemistry & Engineering >Efficient Way To Assemble CdS Nanorose-Decorated CdSe- Tetrakaidecahedron Heterojunction Photoanodes for High- Photoelectrochemical Performance
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Efficient Way To Assemble CdS Nanorose-Decorated CdSe- Tetrakaidecahedron Heterojunction Photoanodes for High- Photoelectrochemical Performance

机译：用于组装CDS纳米糖装饰CDSE-TAKAKECAHEDRON杂交光电的高效方法，高光电化学性能

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The 3D structure assembly of CdSe tetrakaidecahedron (TDH) modified with the oxygenated CdS nanorose (NR) structure plays a crucial role in the photoelectrochemical (PEC) performance because of its advanced morphological, intrinsic optical, and electronic properties. The CdS NR-decorated CdSe-TDH nanostructure is demonstrated on cadmium substrates for the first time, exhibiting a greatly enhanced photocurrent density than the CdSe-TDH nanostructure. A CdSe-TDH photoanode solvothermally synthesized at 160 °C showed excellent PEC performance (2.78 mA·cm-2) under 1 sun illumination. In addition, the photocorrosion of CdSe-TDH photoanodes was systematically investigated, and PEC stability has been improved owing to the formation of nanobuilding blocks between the CdSe-TDH and the CdS NR structures. A set of CdS NR-decorated CdSe-TDH heterojunction at different hydrothermal times was examined and was found to be sensitive to the morphology. X-ray photoelectron spectroscopy and high-resolution transmission electron microscopy analyses of the CdS NR/ CdSe-TDH-4h heterojunction photoanodes confirm the formation of the CdSO3 layer on CdS NR/CdSe-TDH-4h. In this study, CdS NR/CdSe-TDH-4h heterojunction exhibits the optimal photocurrent density of 4.2 mA·cm~(-2), and it is attributed to a quantum size effect and formation of the porous structure caused by the slow elimination of ethylenediamine (en) during the PEC measurement under solar light irradiation. Furthermore, the charge transport mechanism in CdSO3/CdS NR/CdSe-TDH- 4h heterojunction photoanodes has been discussed. We believe that this shape-control strategy provides guidance to overcome the hole-transfer limitation and offers a new opportunity for designing a new type of nanostructure photoanodes which can be applied to photovoltaic devices.
机译：用含氧CDS纳米糖（NR）结构改性的CDSE四氢盐（TDH）的3D结构组装在光电化学（PEC）性能中起着至关重要的作用，因为其先进的形态，内在光学和电子性能。 CDS NR装饰的CDSE-TDH纳米结构首次对镉基底进行了说明，表现出比CDSE-TDH纳米结构的大大增强的光电流密度。在160°C下溶剂热合成的CDSE-TDH光阳极在1次太阳照明下显示出优异的PEC性能（2.78 mA·CM-2）。此外，系统地研究了CDSE-TDH光耦合的光腐蚀，由于CDSE-TDH和CDS NR结构之间的纳米能块的形成，PEC稳定性已经提高。检查了一组CDS NR装饰的CDSE-TDH异质结，在不同的水热时间进行，发现对形态敏感。 X射线光电子能谱和高分辨率透射电子显微镜分析CDS NR / CDSE-TDH-4H异质结灯，确认CDS NR / CDSE-TDH-4H上的CDSO3层的形成。在该研究中，CDS NR / CDSE-TDH-4H异质结具有4.2mA·cm〜（-2）的最佳光电流密度，并且归因于量子尺寸效应和由慢消除速度引起的多孔结构的形成乙二胺（EN）在太阳光照射下PEC测量期间。此外，已经讨论了CDSO3 / CDS NR / CDSE-TDH-4H异质结阳性的电荷传输机制。我们认为，这种形状控制策略提供了克服空穴传输限制的指导，并为设计新型纳米结构光阳极提供了新的机会，该机会可应用于光伏器件。

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