硅胶支撑的赤铁矿、磁铁矿和磁铁矿的合成与表征

IF 2.6 4区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR Magnetochemistry Pub Date : 2023-11-15 DOI:10.3390/magnetochemistry9110228

P. A. Chernavskiy, A. Novakova, G. V. Pankina, D. A. Pankratov, S. I. Panfilov, G. A. Petrovskaya

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引用次数: 0

摘要

提出了一种利用多孔硅胶获得纳米级铁氧化物颗粒的新方法。利用原位磁强计研究了葡萄糖热解过程中沉积在硅胶上的赤铁矿的还原过程。使用 X 射线衍射和莫斯鲍尔光谱法研究了形成的磁铁矿和随后氧化磁铁矿得到的镁铁矿。结果表明，氧化物颗粒的大小和相组成在很大程度上取决于硅胶的多孔结构。特别是在孔径为 30、15 和 10 纳米的二氧化硅凝胶上形成了超顺磁性的磁铁矿颗粒。

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Synthesis and Characterization of Hematite, Magnetite and Maghemite Supported on Silica Gel

A new method for obtaining nanosized particles of iron oxides using porous silica gel is proposed. In situ magnetometry was used to study the reduction of hematite deposited on silica gel during the thermolysis of glucose. The formed magnetite and maghemite obtained by subsequent oxidation of the magnetite were studied using X-ray diffraction and Mossbauer spectroscopy. It was shown that both the size of the oxide particles and the phase composition significantly depended on the porous structure of the silica gel. In particular, the formation of superparamagnetic maghemite particles on silica gels with pore sizes of 30, 15 and 10 nm was demonstrated.

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来源期刊

Magnetochemistry Chemistry-Chemistry (miscellaneous)

CiteScore

3.90

自引率

11.10%

发文量

145

审稿时长

11 weeks

期刊介绍： Magnetochemistry (ISSN 2312-7481) is a unique international, scientific open access journal on molecular magnetism, the relationship between chemical structure and magnetism and magnetic materials. Magnetochemistry publishes research articles, short communications and reviews. Our aim is to encourage scientists to publish their experimental and theoretical results in as much detail as possible. Therefore, there is no restriction on the length of the papers. The full experimental details must be provided so that the results can be reproduced.