|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advances in Environmental Technologies: Recycling and Sustainability Joint Session
||D-7: Preparation of Core-shell Fe3O4@SiO2 Nanoparticles from Iron Tailing via Chemical Co-precipitation Method
||Chao Lv, Shuming Wen, Kun Yang, Shaojun Bai
|On-Site Speaker (Planned)
In this study, iron was extracted from an iron tailing by phosphoric acid for synthesizing a high-value magnetic Fe3O4 nano-powder product by chemical co-precipitation. Furthermore, the Fe3O4 nano-powder was modified by coating with SiO2, the core-shell Fe3O4@SiO2 nanoparticles would have a big potential in water decontamination, biological science and medical technology. Under the optimum leaching condition, iron leaching efficiency could reach 81.55%. The synthetic Fe3O4 NPs with a high purity (Total Fe 72.04 %). Fe3O4 and Fe3O4@SiO2 particles were characterized by X-ray diffraction (XRD), Transmission Electron Microscope (TEM), Fourier transform infrared spectroscopy (FT-IR) and magnetic analysis. The results showed that the synthesized Fe3O4 NPs had a high level of crystallinity with an average diameter of about 10nm and Fe3O4@SiO2 NPs exhibited better dispersion and uniform spherical morphology with about 20nm diameter. Therefore, a new way was proposed for utilization of the iron tailings.