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Ordered spherical large mesoporous material alpha-Fe*O*

A spherical, mesoporous technology, applied in the direction of tin halide, stannous chloride, etc., to achieve the effect of easy control of operating conditions and low cost

Inactive Publication Date: 2008-05-07
YUNNAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is also no spherical large mesoporous Fe with a pore diameter of 37±3nm and a pore wall of 12±2nm. 2 o 3 The magnetic characteristics of the network are reported

Method used

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  • Ordered spherical large mesoporous material alpha-Fe*O*
  • Ordered spherical large mesoporous material alpha-Fe*O*
  • Ordered spherical large mesoporous material alpha-Fe*O*

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Embodiment Construction

[0047] Ordered spherical large mesoporous Fe of the present invention 2 o 3 The material adopts colloidal crystals closely packed and arranged in the three-dimensional direction of PMMA milk balls with a spherical diameter of 71±5nm as a template. 2 o 4 2H 2 The ethanol-water mixed solution of O impregnates the template, heats and solidifies, and roasts to remove the PMMA template. The material has a pore diameter of 37±3nm, a pore wall of 12±2nm, and a spherical large mesoporous structure that extends orderly in the three-dimensional direction. The material is obtained by the following steps:

[0048] a. Add 0.05g SDS to 175mL distilled water, add 15mL methyl methacrylate monomer under magnetic stirring, feed nitrogen into the solution for more than 20 minutes to remove the polymerization inhibitor, add 0.1164g potassium persulfate initiator Dissolved in 20mL of distilled water, then added to the solution, and reacted with magnetic stirring at 70°C for 2 hours to obtain a...

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PUM

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Abstract

The invention relates to an ordered ball type big mesoporous Alpha-Fe2O3 material, belonging to the technical filed of material preparation. The ball type big mesoporous Alpha-Fe2O3 material with an aperture diameter of 37 plus or minus 3nm and an aperture wall of 12 plus or minus 2nm, which orderly extends along the three-dimensional direction, is obtained by taking the polymethacrylic methyl rosmarinate milk-globule the ball diameter of which is 71 plus or minus 5nm and the colloidal crystals which are closely accumulated and distributed along the three-dimensional direction as templates, and through dipping the templates by the ethanol-water mixture of FeC2O4.2H2O, and then removing the PMMA templates through heating, solidifying and roasting. The structure and the magnetic performance of the big mesoporous are determined into a novel ordered ball type big mesoporous Alpha-Fe2O3 material through SEM, TEM, XRD and N2 adsorption test and squid. The material of the invention has the advantages of crystal aperture wall, particular ball type big mesoporous and weak ferromagnetism. The material can be used for preparing for catalyst and sensor.

Description

Technical field: [0001] The invention relates to the preparation of three-dimensional ordered spherical large mesoporous Fe with weak ferromagnetic properties by using a polymer colloidal crystal template method with a reduced spherical diameter 2 o 3 A material belongs to the technical field of material preparation. Background technique: [0002] Template-guided synthesis methods have been widely used to create ordered porous materials with different structures and scales [1] . So far, it has been possible to efficiently synthesize silicas, aluminosilicates, aluminophosphates, and related materials with mesoporous structures [2-4] . However, it is difficult to prepare transition metal oxide materials with mesoporous structures. The previous synthetic work mostly used soft template methods, such as surfactant molecular templates or block copolymer molecular templates with ligands as auxiliary agents. successfully synthesized Nb 2 o 5 ,TiO 2 , ZrO 2 , WO 3 , and mes...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G19/06
Inventor 王彤文常桥稳刘玲
Owner YUNNAN NORMAL UNIV
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