Issue 67, 2017, Issue in Progress

High saturation magnetization superparamagnetic Fe/Ni core/shell microparticles for chromium removal

Abstract

In this paper, the Fe/Ni microparticles are synthesized by two reactions which directly utilize H2 to reduce NiO and Fe3O4 microspheres. X-ray diffraction and transmission electron microscopy show that the as-synthesized Fe/Ni microparticles possess a body/face-centered cubic crystalline structure and core/shell morphology. The magnetic hysteresis loops show that the as-fabricated core/shell Fe/Ni microparticles have a high saturation magnetization (132.8 emu g−1) at 305 K. The as-prepared Ni/Fe microparticles are used to remove Cr(VI) via a coupled adsorption/reduction process. The introduction of nickel not only controls the iron passivation but also advances efficient flow of electron transfer between iron and Cr(VI), thus efficient reduction of Cr(VI) to Cr(III). The excellent products with both high saturation magnetization and Cr(VI) adsorption capacity can be used as candidates for environmental remediation materials.

Graphical abstract: High saturation magnetization superparamagnetic Fe/Ni core/shell microparticles for chromium removal

Article information

Article type
Paper
Submitted
11 Apr 2017
Accepted
10 Aug 2017
First published
01 Sep 2017
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2017,7, 42363-42369

High saturation magnetization superparamagnetic Fe/Ni core/shell microparticles for chromium removal

Z. Lu, Y. Xu and S. Zhou, RSC Adv., 2017, 7, 42363 DOI: 10.1039/C7RA04104G

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