Microwave-Assisted synthesis of Anisotropic copper–silver nanoparticles
Microwave-Assisted synthesis of Anisotropic copper–silver nanoparticles
复制标题
DOI：
10.1016/j.matchemphys.2019.122348
复制
发表时间：
2020-02
影响因子：
4.6
通讯作者：
Peter N. Njoki;Anais E. Rhoades;Joy I. Barnes
中科院分区：
文献类型：
--
作者：
Peter N. Njoki;Anais E. Rhoades;Joy I. Barnes
本文主要研究了微波辐射法合成铜银纳米粒子。通过在室温（RT）和水热温度（HT）下使硝酸铜（II）半（五水合物）（Cu（NO3）2.2.5H2O）、硝酸银（AgNO 3）和丙烯酸钠（C3 H3 NaO 2）水溶液反应来形成CuAg NPs。形状的形成受到HT和还原前体的顺序的影响。通过改变还原温度和控制还原顺序，制备了不同尺寸和形状的CuAg核壳纳米粒子。当Ag+离子在预先形成的Cu纳米颗粒上在室温下还原时，产生了具有（111）晶格的球形纳米颗粒。MW合成产生八面体和棒状NP，这取决于Cu 2+和Ag+离子是否共还原或Ag+离子是否在预形成的Cu NP上还原。通过高透射电子显微镜（HRTEM）检查形态。通过扫描透射电子显微镜-能量色散谱（STEM-EDS）和X射线光电子能谱（XPS）检查NP组合物。
This paper focuses on the synthesis of shaped copper-silver nanoparticles (CuAg NPs) via microwave irradiation (MW). CuAg NPs were formed by reacting aqueous copper(II) nitrate hemi(pentahydrate) (Cu(NO3)2.2.5H2O), silver nitrate (AgNO3) and sodium acrylate (C3H3NaO2) at room temperature (RT) and hydrothermal temperature (HT). Shape formation was influenced by the HT and the sequence of reducing the precursors. By reducing Cu(NO3)2.2.5H2O and AgNO3with C3H3NaO2at different temperatures and manipulating the reduction sequence, variable sizes and shapes of CuAg core-shell NPs were formed. When Ag+ions were reduced on preformed Cu NPs at RT, spherical NPs that featured (111) faucets were produced. The MW synthesis produced octahedra and rods NPs depending on whether Cu2+and Ag+ions were co-reduced or Ag+ions were reduced on preformed Cu NPs. The morphology was examined by high transmission electron microscopy (HRTEM). The NP compositions were examined via scanning transmission electron microscopy - energy dispersive spectroscopy (STEM-EDS) and X-ray photoelectron spectroscopy (XPS).