Preparation method of core-shell structured Fe3O4@MCM-41 magnetic nano material

A technology of fe3o4mcm-41 and magnetic nano, which is applied in the preparation of microspheres and microcapsule preparations, can solve the problems of uneven core-shell structure and small specific surface area of ​​magnetic nanomaterials, and achieve thermodynamic stability

Inactive Publication Date: 2014-02-05
QIQIHAR UNIVERSITY
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0006] The purpose of the invention is in order to solve the Fe that existing method obtains 3 o 4 The core-shell structure of magnetic nanomaterials is uneven and the specific surface area is small, and the core-shell structure Fe 3 o 4 The preparation method of MCM-41 magnetic nanometer material

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  • Preparation method of core-shell structured Fe3O4@MCM-41 magnetic nano material
  • Preparation method of core-shell structured Fe3O4@MCM-41 magnetic nano material
  • Preparation method of core-shell structured Fe3O4@MCM-41 magnetic nano material

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specific Embodiment approach 1

[0021] Specific embodiment 1: In this embodiment, the core-shell structure Fe 3 o 4 The preparation method of MCM-41 magnetic nanometer material is implemented according to the following steps:

[0022] 1. Dissolve cetyltrimethylammonium bromide (CTAB) and sodium dodecylbenzenesulfonate (SDBS) in twice-distilled water at a molar ratio of 1.0: (1.5 to 3.0) to obtain anions / cations Surfactant mixed solution, the anionic / cationic surfactant mixed solution is left to stand at 25-35°C for 24-48 hours to obtain a vesicle phase solution;

[0023] 2. Mix FeCl with a molar ratio of 2.0:1.0 3 and FeSO 4 Dissolve in double-distilled water that has been treated with nitrogen and deoxygenation to obtain an iron salt solution, add the vesicle phase solution in step 1 to the iron salt solution, ultrasonicate at 25-35°C for 2-3 hours, and then add ethylenediamine to adjust the concentration of the system When the pH value reaches 9-10, a black suspension is obtained;

[0024] 3. Add cety...

specific Embodiment approach 2

[0026]Specific embodiment two: the difference between this embodiment and specific embodiment one is that in step one anion / cation surfactant mixed solution, hexadecyltrimethylammonium bromide (CTAB) and sodium dodecylbenzenesulfonate ( SDBS) the total concentration is 0.028 ~ 0.032mol / L. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0027] Embodiment 3: This embodiment differs from Embodiment 1 or Embodiment 2 in that the concentration of Fe ions in the ferrous salt solution in the step is 0.25-0.32 mol / L. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

The invention provides a preparation method of a core-shell structured Fe3O4@MCM-41 magnetic nano material, and relates to a method for synthesizing Fe3O4 magnetic nano material from a vesicle phase. The preparation method of the core-shell structured Fe3O4@MCM-41 magnetic nano material aims to solve the problems of uneven core-shell structure and small specific surface area of the magnetic nano material. The preparation method comprises the following steps of: 1, preparing a vesicle phase solution from hexadecyl trimethyl ammonium bromide and sodium dodecyl benzene sulfonate; 2, dissolving FeCl3 and FeSO4 in secondary distilled water, and then adding the vesicle phase solution to the obtained iron salt solution, adding quadrol to adjust the pH value of the system after ultrasonic treatment to obtain a black suspension; and 3, adding hexadecyl trimethyl ammonium bromide and TEOS (Tetra Ethyl Ortho Silicate) to the black suspension, carrying out a crystallization reaction after pH adjustment, washing and drying the solid-phase crystals and then roasting the solid-phase crystals to obtain the magnetic nano material. The preparation method of the core-shell structured Fe3O4@MCM-41 magnetic nano material is characterized in that the vesicles formed by compounding an anionic surfactant with a cationic surfactant are taken as micro-reactors, the thermodynamic performance of the system is stable, and in the meantime, the specific surface area of the magnetic nano material is large.

Description

technical field [0001] The invention relates to a vesicle phase synthesis of Fe 3 o 4 Methods for Magnetic Nanomaterials. Background technique [0002] Magnetic nanoparticles have broad application space in research fields such as magnetic fluids, drug targeted release, catalysis, medical imaging, cancer therapy, separation technology, biochemical microreactor design, and spectral detection. However, pure magnetic nanoparticles are difficult to realize industrial application due to their own shortcomings such as instability, difficult modification, high chemical activity and easy oxidation. In order to solve this problem, the researchers constructed different wrapping shells on the surface of magnetic nanoparticles to reduce their agglomeration and greatly improved the stability of magnetic nanoparticles. Therefore, the study of magnetic core-shell nanoparticles has become a hot spot in the field of materials chemistry in recent years. [0003] Common shell materials inc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J13/02
Inventor 宋伟明邓启刚
Owner QIQIHAR UNIVERSITY
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