Continuous preparation of Fe3O4 nanoparticles through Impinging Stream-Rotating Packed Bed reactor and their electrochemistry detection toward heavy metal ions
| Autor: | Jing Gao, You-Zhi Liu, Shao-Feng Zhou, Hong-Lei Fan |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Packed bed
Materials science Mechanical Engineering Metal ions in aqueous solution Metals and Alloys Analytical chemistry Nanoparticle 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Electrochemistry 01 natural sciences 0104 chemical sciences Magnetization Mechanics of Materials Electrode Materials Chemistry 0210 nano-technology Fe3o4 nanoparticles Superparamagnetism |
| Zdroj: | Journal of Alloys and Compounds. 671:354-359 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2016.02.062 |
| Popis: | We reported the continuous preparation and electrochemical behavior toward heavy metal ions of the Fe 3 O 4 nanoparticles (Fe 3 O 4 NPs). This Fe 3 O 4 NPs were fabricated through a novel Impinging Stream-Rotating Packed Bed reactor with a high production rate of 2.23 kg/hour. The as-prepared Fe 3 O 4 NPs were quasi-spherical with a mean diameter of about 10 nm and shown the characteristics of superparamagnetism with the saturated magnetization of 60.5 emu/g. The electrochemical characterization of the as-prepared Fe 3 O 4 NPs toward heavy metal ions were evaluated using square wave anodic stripping voltammetry (SWASV) analysis. The results indicated that the modified electrode could be used to individual detection of Pb(II), Cu(II), Hg(II) and Cd(II). In particular, the modified electrode exhibited the selective detection toward Pb(II) with higher sensitivity of 14.9 μA/μM, while the response to Cu(II), Hg(II) and Cd(II) were negligible. Besides, the modified electrode shown good stability and potential practical applicability in the electrochemical determination of Pb(II). This above results offered a simple method for continuous preparation sensing materials in the application field of electrochemical detection of toxic metal ions through the technology of process intensification. |
| Databáze: | OpenAIRE |
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