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Multi-element metal oxide mesoporous material

A technology of mesoporous materials and multi-element metals, which is applied in the field of multi-element metal oxide mesoporous materials, can solve the problems of narrow absorbing frequency band and high density, and achieve the effect of improving absorbing performance and simple preparation method

Active Publication Date: 2014-04-30
SUZHOU JUHUIBANG NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a multi-element metal oxide mesoporous material to solve the problems of narrow absorption frequency band and high density of traditional ferrite absorbing materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take x=1, namely n(MgCl 2 ·6H 2 O): n(AlCl 3 ): n(FeCl 3 ·6H 2 O) =1:1:9.

[0018] 1) First add 5 grams of mesoporous foamed silica into 50 grams of chloroform, ultrasonically disperse for 4 hours, then add 0.09mol FeCl 3 ·6H 2 O, 0.01mol AlCl 3 and 0.01mol MgCl 2 ·6H 2 O, add ammonia solution with a mass fraction of 10% to adjust the pH of the solution to 8, stir for 2 hours, let stand for 1 hour, filter, wash with water and dry to obtain nanopowder.

[0019] 2) Carry out high-temperature calcination on the dried nano-powder: under the protection of nitrogen atmosphere, heat from room temperature to 800°C, the heating rate is 6°C / min, maintain 800°C for 1 hour, and finally cool down with the furnace under the protection of nitrogen , the prepared multi-element metal oxide mesoporous material is MgAlFe 9 o 16 .

Embodiment 2

[0021] Take x=0, namely n(MgCl 2 ·6H 2 O): n(FeCl 3 ·6H 2 O) =1:10.

[0022] 1) First add 5 grams of mesoporous foamed silica to 50 grams of chloroform, ultrasonically disperse for 6 hours, and then add 0.1mol FeCl 3 ·6H 2 O and 0.01mol MgCl 2 ·6H 2 O, add ammonia solution with a mass fraction of 15% to adjust the pH of the solution to 10, stir for 5 hours, let stand for 3 hours, filter, wash with water and dry to obtain nanopowder.

[0023] 2) Carry out high-temperature calcination on the dried nano-powder: under the protection of nitrogen atmosphere, heat from room temperature to 800°C, the heating rate is 6°C / min, maintain 800°C for 1 hour, and finally cool down with the furnace under the protection of nitrogen , the prepared multi-element metal oxide mesoporous material is MgFe 10 o 16 .

Embodiment 3

[0025] Take x=0.5, namely n(MgCl 2 ·6H 2 O): n(AlCl 3 ): n(FeCl 3 ·6H 2 O) =1:0.5:9.5.

[0026] 1) First add 5 grams of mesoporous foamed silica into 50 grams of chloroform, ultrasonically disperse for 5 hours, and then add 0.095mol FeCl 3 ·6H 2 O, 0.005mol AlCl 3 and 0.01mol MgCl 2 ·6H 2 O, adding a mass fraction of 15% ammonia solution to adjust the pH of the solution to 9, stirring for 3 hours, standing for 2 hours, filtering, washing and drying to obtain nanopowder.

[0027] 2) Carry out high-temperature calcination on the dried nano-powder: under the protection of nitrogen atmosphere, heat from room temperature to 800°C, the heating rate is 6°C / min, maintain 800°C for 1 hour, and finally cool down with the furnace under the protection of nitrogen , the prepared multi-element metal oxide mesoporous material is MgAl 0.5 Fe 9.5 o 16 .

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Abstract

The invention relates to a mesoporous material, and particularly relates to a multi-element metal oxide mesoporous material. The material is prepared by using mesoporous foam silica as a hard template, a preparation method comprises the following steps: 1) adding the mesoporous foam silica to chloroform for ultrasonic dispersion, adding FeCl3.6H2O, AlCl3 and MgCl2. 6H2O, adding ammonia solution to adjust the pH value of 8-10, stirring, standing, filtering, washing with water and drying to prepare nano powder; 2) performing high temperature calcination on the dried nano powder to prepare a nano ferrite wave-absorbing material. The multi-element metal oxide mesoporous material has the advantages that: 1) the nano ferrite is a multi-element metal oxide material, has ferroelectric, ferromagnetic, and dielectric semiconductor properties, so that the wave-absorbing properties of the material can be improved; and 2) by use of the mesoporous silica as the hard template, and by means of the ultra-large hole size and a three-dimensional connected special structure of the mesoporous silica foam material, the ordered mesoporous nano ferrite is obtained, and the nano ferrite has both nano material properties and the three-dimensional pore structure.

Description

technical field [0001] The invention relates to a mesoporous material, in particular to a multi-element metal oxide mesoporous material. Background technique [0002] Multi-element metal oxide materials are oxide materials composed of two or more metal elements. Because of its unique physical and chemical characteristics, it has ferroelectric, electromagnetic, piezoelectric, dielectric and other semiconductor properties, and is widely used in electronics, catalysis, photoelectric conversion, environmental purification, fuel cells and other industries. Due to the mesoporous channel structure of the mesoporous multi-element metal oxide material, some functions of the original material can be improved. [0003] 200710036694.4 disclosed a method of one-time vacuum infusion synthesis of metal oxide mesoporous materials: using mesoporous silicon / mesoporous carbon as a hard template, after high vacuum treatment, using pressure difference to enhance capillary action, inorganic salt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00C01G49/02
Inventor 胡敏刚
Owner SUZHOU JUHUIBANG NEW MATERIAL TECH CO LTD
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