利用废弃微硅粉制备纳米SiO_2粉体

Preparation of Silica Nanoparticles from Waste Light Silicon Ash

本文以低含量微硅粉为原料,经酸浸、HF酸溶解、水解、干燥等步骤制备了纳米SiO2粉体。采用X-射线衍射(XRD),傅里叶红外光谱(FT-IR),冷场发射扫描电镜(SEM)及能谱(EDS)等手段对原料和产物进行了表征。结果表明制备的纳米SiO2粉体的SiO2含量>97%,粒径分布均匀,平均粒径约90nm,BET吸附比表面积为210m2/g。本文对废弃微硅粉的资源化具有积极的作用。

The silica nanoparticles was prepared using low concentration light silicon ash as material which always was aban- doned as an industry waste. X-ray diffraction （XRD）, Fourier transform infrared （FT-IR） spectra and scanning electron microscope （SEM） have been used for the characterization of silica nanoparticles while energy-dispersive spectrometry （EDS） was used to measure the component and concentration. The results shown that the purity of prepared silica nanoparticles was more than 97%, the average particles size 90 nm, the specific surface area measured by brunauer-emmett-teller（BET） was 210m2/g. This paper has positive effect for well use of light silicon ash resource