Continuous preparation of Fe3O4 nanoparticles using impinging stream-rotating packed bed reactor and magnetic property thereof
| Autor: | Shao-Feng Zhou, You-Zhi Liu, Hong-Lei Fan, Gui-Sheng Qi |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Packed bed
Aqueous solution Chromatography Materials science Mechanical Engineering Metals and Alloys Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Micromixing chemistry.chemical_compound Chemical engineering chemistry Mechanics of Materials Materials Chemistry Magnetic nanoparticles 0210 nano-technology Saturation (magnetic) Superparamagnetism Magnetite |
| Zdroj: | Journal of Alloys and Compounds. 662:497-504 |
| ISSN: | 0925-8388 |
| Popis: | A novel impinging stream-rotating packed bed (IS-RPB) was adopted for preparing Fe 3 O 4 nanoparticles via reactive precipitation using aqueous solutions of FeCl 3 /FeCl 2 and NaOH as raw materials. In order to establish the optimum conditions for the preparation of monodispersed magnetite Fe 3 O 4 particles, experimental conditions such as high gravity factor, liquid flow rate and reactant concentration were investigated in detail. It shows that the size of Fe 3 O 4 nanoparticles became smaller under the higher gravity factor, liquid flow rate and reactant concentration. And the as-prepared Fe 3 O 4 nanoparticles displays superparamagnetic behavior with the saturation magnetizations in the range from 39.0 to 74.0 emu/g. Based on the experimental results, a set of suitable operating parameters (high gravity factor of 65.32, liquid flow rates of 60 L/h and FeCl 3 ·6H 2 O concentration of 0.321 mol/L) were recommended for the preparation of Fe 3 O 4 nanoparticles. Under this condition, the as-prepared Fe 3 O 4 nanoparticles is monodispersed quasi-spherical nanoparticles with an average diameter of about 8.9 nm and saturation magnetization of 60.5 emu/g, and the production rate reaches 2.23 kg/hour. Through the strong micromixing intensification performance of IS-RPB, this novel approach is suitable for industrial production of magnetic nanoparticles at massive scale. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect