A simple facile approach to large scale synthesis of high specific surface area silicon nanoparticles

作者：Epur Rigved; Minardi Luke; Datta Moni K; Chung Sung Jae; Kumta Prashant N^*

来源：Journal of Solid State Chemistry, 2013, 208: 93-98.

DOI：10.1016/j.jssc.2013.09.002

• Silicon
• High surface area silicon
• Nano silicon
• Mechanical milling
• Mechanochemical reduction

An inexpensive, facile, and high throughput synthesis of silicon nanoparticles was achieved by the mechano-chemical reduction reaction of magnesium suicide (Mg2Si) and silicon monoxide (SiO) using a high energy mechanical milling (HEMM) technique followed by acid leaching. Characterization of the resultant product using X-Ray diffraction, Raman spectroscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM) and surface area analyses was performed at various stages of the synthesis process. XRD patterns show that the final product formed is single phase silicon and the nanocrystalline nature was confirmed by the shifted transverse optical (TO) band, characteristic of nc-Si determined by Raman analysis. SEM and TEM shows the presence of particles of different sizes in the range of few nanometers to agglomerates of few microns which is consistent with products obtained from mechanical milling. BET measurements show a very high specific surface area (SSA) of similar to 190 m(2)/g obtained due to acid leaching which is also validated by the porous nature of the particles confirmed by the SEM images.

• 出版日期2013-12