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Method for preparing metal oxides or metal composite oxides

A metal composite and oxide technology, applied in the direction of oxide/hydroxide preparation, metal/metal oxide/metal hydroxide catalyst, rare earth metal oxide/hydroxide, etc., can solve the difficult control of co-precipitation conditions And other issues

Active Publication Date: 2018-02-16
INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The chemical precipitation method has the advantages of simple preparation method, low cost, and easy industrialization, but there is a disadvantage that the coprecipitation conditions are difficult to control for the production and preparation of metal composite oxides.

Method used

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  • Method for preparing metal oxides or metal composite oxides
  • Method for preparing metal oxides or metal composite oxides

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Weigh 3.75g of aluminum nitrate nonahydrate and 10g of polyethylene glycol 400, and add them to a 50mL PTFE reaction vessel; seal the PTFE reaction vessel and place it under constant temperature magnetic stirring at 80°C In the oil bath, magnetic stirring was continued for 1 hour to obtain a molten mixed liquid;

[0020] (2) Add 1 g of cetyl trimethyl ammonium bromide to the polytetrafluoroethylene reaction vessel, and continue magnetic stirring for 1 hour to obtain a melted and dispersed mixture;

[0021] (3) Quickly transfer the melted and dispersed mixture into a corundum crucible, and put it into a tube furnace for calcination at 800°C for 5 hours in a static air atmosphere, and cool down with the furnace to obtain powdered alumina.

Embodiment 2

[0023] (1) Weigh 4.04g of iron (III) nitrate nonahydrate and 10g of polyethylene glycol 400, and add them to a 50mL PTFE reaction vessel; seal the PTFE reaction vessel and place it in a 60°C In the constant temperature magnetic stirring oil bath, the magnetic stirring is continued for 1 hour to obtain the molten mixed material liquid;

[0024] (2) Add 1 g of cetyl trimethyl ammonium bromide to the polytetrafluoroethylene reaction vessel, and continue magnetic stirring for 1 hour to obtain a melted and dispersed mixture;

[0025] (3) Quickly transfer the melted and dispersed mixture into a corundum crucible, and put it into a tube furnace for calcination at 700°C for 5 hours in a static air atmosphere, and cool down with the furnace to obtain powdered iron oxide.

Embodiment 3

[0027] (1) Weigh 2.91 g of cobalt(II) nitrate hexahydrate and 10 g of polyethylene glycol 600, and add them to a 50 mL PTFE reaction vessel; seal the PTFE reaction vessel and place it in a 60°C In the constant temperature magnetic stirring oil bath, the magnetic stirring is continued for 1 hour to obtain the molten mixed material liquid;

[0028] (2) Add 1 g of cetyl trimethyl ammonium bromide to the polytetrafluoroethylene reaction vessel, and continue magnetic stirring for 1 hour to obtain a melted and dispersed mixture;

[0029] (3) Quickly transfer the melted and dispersed mixture into a corundum crucible, and put it into a tube furnace for calcination at 600 °C for 5 hours in a static air atmosphere, and then cool with the furnace to obtain powder cobalt tetroxide.

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Abstract

The invention relates to a method for preparing metal oxides or metal composite oxides. The method comprises the following steps: heating the temperature of metal nitrate and a dispersion carrier to 50 DEG C to 150 DEG C, and carrying out stirring to enable the metal nitrate to be melted and dispersed in the dispersion carrier, so as to obtain a melted mixture solution; adding a template agent into the melted mixture solution, and carrying out stirring, so as to obtain a melted and dispersed mixture; and carrying out calcining for 3 to 5 hours at the temperature of 400 DEG C to 900 DEG C, andcarrying out furnace cooling, thereby obtaining powdered metal oxides or metal composite oxides. The method disclosed by the invention has the following advantages that the raw materials are readily available, the cost is low, the method is simple and controllable, large-sized special equipment is not required, and industrial production is easy to achieve.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic materials, in particular to a preparation method of a metal oxide or a metal composite oxide. Background technique [0002] Metal oxides have the characteristics of redox activity, variable valence, good stability, corrosion resistance, high temperature resistance, etc., which make them have great application prospects in the fields of sensing, optoelectronics, catalysis, adsorption, etc. Frontier research fields at home and abroad. [0003] At present, the methods for synthesizing metal oxides and metal composite oxides include solvothermal method, sol-gel method and chemical precipitation method. (1) Solvothermal method is one of the conventional methods for preparing nano-metal oxides in the laboratory. Usually, dispersing agent, structure-directing agent and reducing agent are added to the solution of metal precursor salt, and special morphology is obtained by high-pressure t...

Claims

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Application Information

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IPC IPC(8): C01B13/18C01F7/02C01G49/06C01G51/04C01G53/04C01G3/02C01G9/02C01G37/02C01G25/02C01F17/00B01J23/72B01J23/83B01J23/75C01B32/50
CPCB01J23/002B01J23/72B01J23/75B01J23/83C01B13/18C01B13/185C01F7/02C01F17/206C01G3/02C01G9/02C01G25/02C01G37/02C01G49/06C01G51/04C01G53/04C01P2002/72
Inventor 陶进长肖方明曹洪杨郭秋松李伟朱薇高远金明亚张魁芳
Owner INST OF RESOURCES UTILIZATION & RARE EARTH DEV GUANGDONG ACAD OF SCI
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