期刊
JOURNAL OF MATERIALS CHEMISTRY C
卷 2, 期 29, 页码 5818-5828出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4tc00429a
关键词
-
资金
- Fundacao para a Ciencia e a Tecnologia (FCT)
- FEDER [PEst-C/EQB/LA0006/2013, NORTE-07-0124-FEDER-000067, NORTE-070124-FEDER-000070]
- Program COMPETE [PTDC/QUI-QUI/105304/2008]
- CCDRN as well as Interreg IV B SUDOE through Transpyrenees Action on Advanced Infrastructures for the Nanosciences and Nanotechnologies (Train<SUP>2</SUP>) project
- FCT [SFRH/BPD/87430/2012]
- Gobierno de Aragon [E81]
- European Social Fund
This work reports the tailored design of novel mixed ferrite nanoparticles, CoxMn1-xFe2O4 (x = 0, 0.3, 0.7, and 1), through an optimized one-pot aqueous coprecipitation process. The influence of the substitution between Mn(II) and Co(II) and of the alkaline agent, isopropanolamine (MIPA) or NaOH, on the morphological, chemical and magnetic properties of the nanomaterials was investigated. The joint action between chemical substitution and type of alkaline agent allowed a precise tuning of the particle size, magnetic properties and inversion degree of the spinel structure. A wide range of particle dimensions (from 3 to 30 nm) and saturation magnetization (from 57 to 71 emu g(-1)) was achieved. The increase of Co(II) content from x = 0 to x = 1 led to a systematic decrease of the particle size, regardless of the base type, which could be modelled by an exponential decay function. For each Co : Mn composition, the use of MIPA instead of the traditional NaOH promoted a three times reduction of the particle size and simultaneously switched the magnetic state of the CoxMn1-xFe2O4 nanomaterials from ferromagnetic to superparamagnetic. These results constitute a step forward in the challenging quest for high-performance magnetic nanoprobes by an eco-friendly synthesis route.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据