Xu Xiaochuan, Zhang Haipeng, Liu Bin, Yang Jianhui
Key Laboratory of Synthetic and Natural Functional Molecule Chemistry (Ministry of Education), Shaanxi Key Laboratory of Physico-Inorganic Chemistry, College of Chemistry & Materials Science, Northwest University Xi'an 710069 P. R. China
Xi'an Changfeng Research Institute of Mechanism and Electricity Xi'an 710065 P. R. China.
RSC Adv. 2020 Feb 26;10(14):8286-8290. doi: 10.1039/d0ra00715c. eCollection 2020 Feb 24.
In this work, corolla-shaped gold nanostructures with (110) planes were successfully synthesized using ethylenediaminetetraacetic acid (EDTA) and polyvinylpyrrolidone (PVP) as the co-reductants and shape-directing agents. The structure and the mechanism of the nanostructures were investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and electrochemical characterization. On the basis that surface energies of different gold crystallographic planes are in the order (111) < (100) < (110), the (110) plane has the highest surface energy among the low-index planes. The gold nanocrystals with exposed high-energy planes are important in facilitating their potential applications such as highly efficient catalysts. This research is of great significance for the subsequent work on the synthesis of nanocrystals dominated by high-energy crystal planes.
在本工作中，以乙二胺四乙酸（EDTA）和聚乙烯吡咯烷酮（PVP）作为共还原剂和形貌导向剂，成功合成了具有（110）面的花冠形金纳米结构。通过扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射（XRD）、X射线光电子能谱（XPS）和电化学表征对纳米结构的结构和机理进行了研究。基于不同金晶面的表面能顺序为（111）<（100）<（110），（110）面在低指数面中具有最高的表面能。具有暴露高能面的金纳米晶体对于促进其潜在应用（如高效催化剂）具有重要意义。本研究对于后续以高能晶面为主导的纳米晶体合成工作具有重要意义。
