硼氢化钠
硝酸银
柠檬酸钠
透射电子显微镜
银纳米粒子
催化作用
材料科学
离子
吸附
粒子(生态学)
纳米颗粒
化学工程
无机化学
纳米技术
核化学
化学
物理化学
有机化学
海洋学
病理
医学
工程类
地质学
作者
Shuang Geng,Ziyao Yu,Run Zhang,bingyuan fan,Qian Wang,Jiejie Guang,Shan Wang,Xiang Zhang,Chengchen Hou,Qianqian Wang,Kejie Zhang,Meng Wang
标识
DOI:10.1016/j.jscs.2023.101610
摘要
Triangular silver nanoplates exhibit excellent optical and catalytic properties in many fields, such as catalysts, sensors and bio-medicine. In this paper, triangular nanoplates were generated just in the presence of sodium citrate through a light-induced ripening process, which were converted from spherical silver nanoparticles by reducing silver nitrate with sodium borohydride. By using UV–Vis spectroscopy, particle size analyzer, transmission electron microscopy (TEM) and Ag+ concentration analysis, the effects of precursors during the preparation of triangular nanoplates were systematically investigated and the optimal experimental conditions were determined. Based on density functional theory (DFT), the adsorption energies of citrate ion, malate ion and tartronate ion on Ag (1 1 1), (1 1 0) and (1 0 0) were calculated. In addition, theoretical calculations coupled with experimental observations showed that citrate ion as capping agent could more preferentially bind to Ag (1 1 1) and thus blocked Ag (1 1 1) while only allowing extensive growth along the lateral direction. This well explains sodium citrate is an efficient agent in preparing triangular silver nanoplates.
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