Ashok Anchu, Kumar Anand, Tarlochan Faris
Department of Mechanical and Industrial Engineering, College of Engineering, Qatar University, Doha P.O. Box-2713, Qatar.
Department of Chemical Engineering, College of Engineering, Qatar University, Doha P.O. Box-2713, Qatar.
Nanomaterials (Basel). 2018 Aug 9;8(8):604. doi: 10.3390/nano8080604.
Herein, we report the synthesis of silver-cobalt nanopowders using three different modes of solution combustion synthesis, and we present the effects of the synthesis conditions on particle morphology. The synthesized nanoparticles were characterized using X-ray diffraction (XRD), Scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), UV-Visible spectrophotometer (UV-vis), Transmission electron microscopy (TEM), and X-Ray Photoelectron Spectroscopy (XPS) to understand the structural and elemental properties. When Co is synthesized over Ag in a second wave of combustion, peak shifts observed in XRD and XPS show a change in the cell parameters and prove the existence of a strong electronic interaction between Ag and Co. Better control of mixing and alloying through the second wave combustion synthesis mode (SWCS) was evident. The sequence of combustion affects the structure and composition of the material. SWCS reduces the amount of carbon content, as compared to single-stage combustion, and the combustion of carbon is followed by a rearrangement of atoms.
在此，我们报告了使用三种不同的溶液燃烧合成模式合成银钴纳米粉末的情况，并展示了合成条件对颗粒形态的影响。使用X射线衍射（XRD）、扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）、紫外可见分光光度计（UV-vis）、透射电子显微镜（TEM）和X射线光电子能谱（XPS）对合成的纳米颗粒进行表征，以了解其结构和元素特性。当在第二波燃烧过程中在银上合成钴时，XRD和XPS中观察到的峰位移表明晶胞参数发生了变化，并证明了银和钴之间存在强电子相互作用。通过第二波燃烧合成模式（SWCS）对混合和合金化的更好控制是显而易见的。燃烧顺序会影响材料的结构和组成。与单阶段燃烧相比，SWCS减少了碳含量，并且碳燃烧后原子会重新排列。
