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Preparation method of core-shell structure alpha-Fe2O3 magnetic colloid

A technology of core-shell structure and colloid, which is applied in the field of preparation of magnetic colloid core-shell structure α-Fe2O3, can solve the problem that the colloid has not been synthesized, and achieve the effect of simple and feasible method, low cost and wide source

Inactive Publication Date: 2017-07-28
XINXIANG UNIV
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Problems solved by technology

However, a simple and controllable method for synthesizing colloids is still a great challenge. Although some achievements have been made in the synthesis of colloids, colloids with a core-shell structure have not been synthesized so far.

Method used

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  • Preparation method of core-shell structure alpha-Fe2O3 magnetic colloid
  • Preparation method of core-shell structure alpha-Fe2O3 magnetic colloid

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Embodiment

[0012] Weigh 0.8mmol of ferric chloride (FeCl 3 ·6H 2 O, analytically pure, Sinopharm Chemical Reagent Co., Ltd.) and 0.3 g of glycine (analytical pure, Sinopharm Chemical Reagent Co., Ltd.) were dissolved in a mixed solution of 2 mL of deionized water and 18 mL of ethanol, and magnetically stirred in a nitrogen-protected environment. Stir continuously on the container for 5min, then transfer the mixture to a 50mL polytetrafluoroethylene liner reactor, heat and react at 160°C for 12h, after the reaction is completed and naturally cooled to room temperature, the precipitate is collected by centrifugation, washed with ethanol several times, and then placed in Drying at 60°C to obtain magnetic colloidal core-shell structure α-Fe 2 o 3 .

[0013] The X-ray powder diffraction (XRD) pattern of the obtained sample is measured as figure 1 As shown, all the diffraction peaks can be indexed to the hexagonal phase of α-Fe 2 o 3 (The standard card is JCPDS No. 33-0664), and no impur...

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Abstract

The invention discloses a preparation method of a core-shell structure alpha-Fe2O3 magnetic colloid and belongs to the technical field of synthesis of core-shell structure nano materials. The technical scheme of the invention has the key points that glycine is taken as a structure-directing agent, a water and ethanol mixed solvent thermal process is used, a bottom-up approach is utilized, and the core-shell structure alpha-Fe2O3 magnetic colloid is prepared by controlling reaction time and reaction conditions. The preparation method disclosed by the invention is convenient and feasible, synthesis of the core-shell structure alpha-Fe2O3 is realized for the first time, and the core-shell structure alpha-Fe2O3 has the characteristics of magnetic property, no toxicity, extensive sources and low cost, so that the core-shell structure alpha-Fe2O3 magnetic colloid has significant potential practical value.

Description

technical field [0001] The invention belongs to the technical field of synthesis of core-shell structure nanomaterials, in particular to a magnetic colloidal core-shell structure α-Fe 2 o 3 method of preparation. Background technique [0002] Compared with individual nanoparticles, the three-dimensional superstructure composed of nanoparticles exhibits excellent physical and chemical properties. This complex superstructure that assembles basic structural units into functions has attracted researchers in the fields of chemistry, physics and materials science. broad interests. Colloidal structure (Colloidosome) is one of such three-dimensional superstructures. As an important type of colloidal structure in the superstructure, it is a microcapsule or microsphere with a hollow structure and a shell. The shell is generally composed of stacked colloidal particles or solidified colloidal particles. Since researchers first synthesized colloids using micron-sized polystyrene sphe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06B82Y30/00B82Y40/00
CPCC01G49/06B82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2004/04C01P2004/50C01P2004/61C01P2004/62C01P2004/64
Inventor 郭志超申建芳张丽伟程素君
Owner XINXIANG UNIV
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