Hollow magnetic nano-grade composite catalytic material and preparation method thereof

A technology of magnetic nano and catalytic materials, applied in chemical instruments and methods, physical/chemical process catalysts, metal/metal oxide/metal hydroxide catalysts, etc., can solve the types of magnetic nanocomposite catalytic materials, preparation methods and catalytic performance The research is sparse and other problems, to achieve the effect of mild synthesis conditions and simple process

Active Publication Date: 2012-10-24
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, at present, the types, preparation methods and catalytic performance of magnetic nanocomposite catalytic materials with hollow structures are very scarce (J. Phys. Chem. C, 2009, 113, 553–558)

Method used

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  • Hollow magnetic nano-grade composite catalytic material and preparation method thereof
  • Hollow magnetic nano-grade composite catalytic material and preparation method thereof
  • Hollow magnetic nano-grade composite catalytic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) Add reactants

[0031] 2.5mmol Co(NO 3 ) 2 ·6H 2 O and 0.08g Fe 3 o 4 The nanoclusters were added to 35ml of ethanol, and NaOH was added to adjust the pH of the solution to 7, and stirred at room temperature until a uniform suspension was formed.

[0032] 2) One-step solvent heat treatment

[0033] The suspension obtained in 1) was transferred to a 50ml automatic pressure-relieving stainless steel high-pressure digestion tank with a polytetrafluoroethylene liner (Binhai County Zhenghong Plastic Factory, model: 50ml), and after 72h of solvent heat treatment at 200°C, , naturally cooled to room temperature.

[0034] 3) Post-processing

[0035] Magnetically separate the black solid obtained in 2) from the solution system under the action of an external magnetic field, and wash it with a mixed solvent of ethanol and water, and go through a magnetic separation-cleaning cycle for 3-5 times, and finally place the cleaned black magnetic solid in Drying under vacuum c...

Embodiment 2

[0040] Repeat embodiment 1, its difference is only to use MnFe 2 o 4 instead of Fe 3 o 4 , to obtain a hollow composite magnetic nanocatalytic material: Co 3 o 4 / MnFe 2 o 4 .

Embodiment 3

[0042] Repeat embodiment 1, its difference is only to use 2.5mmol Zn (NO 3 ) 2 ·6H 2 O instead of 2.5mmol Co(NO 3 ) 2 ·6H 2 O, use NiFe 2 o 4 instead of Fe 3 o 4 , the heat treatment time is 120h, and the hollow composite magnetic nano-catalytic material is obtained: ZnO / NiFe 2 o 4 .

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Abstract

The invention discloses a hollow magnetic nano-grade composite catalytic material MOx(OH) / ferrite magnetic nano-cluster and a preparation method thereof. According to the invention, metal salt and ferrite magnetic nano-cluster with certain amounts are added into appropriate micro-molecular monohydric alcohol or polyhydric alcohol; the mixture is subjected to heat treatment for a certain period of time under a certain temperature; an obtained product is subjected to magnetic separation-washing, and drying treatment, such that the inorganic nano-grade composite material hollow MOx(OH) / ferrite magnetic nano-cluster is obtained, wherein MOx(OH) is one or a mixture of more than two selected from metal oxide, composite oxide, basic oxide, and metal. The invention provides a simple and pervasive preparation method. With the invention, several types of novel hollow magnetic nano-grade composite catalytic materials are obtained. A novel idea is provided for the preparations of magnetic nano-grade composite catalytic materials. A catalytic performance of the material is evaluated in a benzyl alcohol oxidation system, and a research basis is provided for industrialized application of the material.

Description

technical field [0001] The invention relates to a class of composite catalytic materials and a preparation method thereof, in particular to a class of hollow magnetic nanocomposite catalytic materials and a preparation method thereof. Background technique [0002] Catalytic processes play a pivotal role in chemical industry processes. According to statistics, more than 90% of modern commodity production requires catalytic processes. Therefore, the development of new catalysts and their performance research has always been a key research field. Nanocatalysts that appeared in the 21st century are developed as fourth-generation catalysts because of their superior catalytic performance compared with traditional catalysts. Magnetic nanocomposite catalysts have both the high catalytic activity of nanocatalysts and the characteristics that magnetic materials can be easily recovered in an external magnetic field. It is an advanced form of nanocatalyst development. In the past six ye...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/75B01J23/889B01J23/80B01J23/825B01J23/83B01J23/835B01J23/755B01J23/89B01J23/745B01J35/02
Inventor 张铁锐张东慧吴骊珠佟振合
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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