Preparation method of flaky iron sulfide single crystal nano-material

Abstract

The invention relates to a preparation method of a flaky iron sulfide single crystal nano-material. The method comprises the following steps of: (1) mixing an iron source and trioctylphosphine oxide, dissolving in oleylamine, stirring, feeding nitrogen or argon to remove oxygen, and then obtaining an iron source precursor; (2) heating and stirring the iron source precursor in oil bath to obtain iron source solution; (3) dissolving a sulfur source in the oleylamine, stirring, feeding argon or nitrogen to remove oxygen, and then obtaining sulfur source solution; (4) heating the sulfur source solution, extracting through a needle tube, quickly injecting into the iron source solution, carrying out warming reaction on the oil bath for heating the iron source, and obtaining a colloid of the flaky iron sulfide single crystal nano-material; and (5) cooling the colloid of the flaky iron sulfide single crystal nano-material to room temperature, adding trichloromethane-ethanol mixed solution, and carrying out washing and centrifugalizing processing for many times until centrifugate on an upper layer is colorless so as to obtain the flaky single-phase iron sulfide single crystal nano-material. The obtained product has uniform grain size and shape, good process repeatability, and stable quality.

Description

technical field [0001] The invention relates to a preparation method of ferric tetrasulfide, in particular to a preparation method of sheet-shaped ferric ferric sulfide nano single crystal. Background technique [0002] As a magnetic material, iron tetrasulfide is a ferromagnetic material. Ferromagnetic materials are widely used in the industrial field, and can be used as microwave absorbing materials, magnetic recording materials, magnetic liquids, and also have a wide range of applications in the field of biomedicine. Iron tetrasulfide can be used in cancer hyperthermia therapy, and its magnetic properties make this material promising as a medium for targeted drug delivery, which can be used in the medical field in the near future (M. Posfai, P. R. Buseck, D. A. Bazylinski and R. B. Frankel , Iron sulfates from magnetotactic bacteria; structure, composition, and phase transitions [J]. Journal of the Mineralogical Society of America. 1998, 83 (11-12), 1469-1481.; Y. S. Cha...

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Problems solved by technology

Although there are also studies on the synthesis of ferric sulfide in the current literature reports, the general phase purity is poor, and most of them contain other sulfur iron compounds.

At the same time, the morphology of iron tetrasulfide is also difficult to control in the reported synthesis process, and it is difficult to obtain nanocrystals of iron tetrasulfide with uniform size, regular morphology and controllability.

At present, there is no report on the preparation method of monodisperse, single phase, uniform size and controllable morphology of iron tetrasulfide nano single crystals.

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