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Ordered spherical large mesoporous material alpha-Fe2O3

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

Inactive Publication Date: 2009-08-19
YUNNAN NORMAL UNIV
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  • Abstract
  • Description
  • Claims
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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-Fe2O3
  • Ordered spherical large mesoporous material alpha-Fe2O3
  • Ordered spherical large mesoporous material alpha-Fe2O3

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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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Abstract

The invention relates to an ordered spherical large mesoporous α-Fe2O3 material, which belongs to the technical field of material preparation. The present invention adopts colloidal crystals closely packed and arranged in the three-dimensional direction of polymethyl methacrylate milk balls with a ball diameter of 71±5nm as a template, impregnates the template with an ethanol-water mixed solution of FeC2O4 2H2O, heats and solidifies, and roasts to remove PMMA template, obtained spherical large mesoporous α-Fe2O3 material with pore diameter of 37±3nm, pore wall of 12±2nm, and orderly extension in three-dimensional direction. After SEM, TEM, XRD, N2 adsorption experiments and superconducting quantum interferometer to determine its large mesoporous structure and magnetic properties, it is a new type of ordered spherical large mesoporous α-Fe2O3 material. The material of the invention has the advantages of crystalline hole walls, special spherical large mesopore network and weak ferromagnetic properties, and can be used to prepare catalysts and sensors.

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 Patents(China)
IPC IPC(8): C01G19/06
Inventor 王彤文常桥稳刘玲
Owner YUNNAN NORMAL UNIV
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