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Preparation method of alpha-Fe2O3 cubes

A technology of cube and iron salt, applied in the field of chemical engineering, can solve the problems of low product yield, high raw material cost, poor size control effect, etc., and achieves the effects of good repeatability, simple operation and low cost of raw materials

Inactive Publication Date: 2014-12-24
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, α-Fe with different sizes is usually prepared by hydrothermal or solvothermal synthesis. 2 o 3 Cubic structure, due to the limitations of different reaction systems, the cost of raw materials is high, the yield of products is low, and the effect of size control is not good

Method used

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  • Preparation method of alpha-Fe2O3 cubes
  • Preparation method of alpha-Fe2O3 cubes
  • Preparation method of alpha-Fe2O3 cubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 1. Add 1.010 g of ferric nitrate nonahydrate and 1.100 g of urea into 17 mL of propanol solvent, and stir to obtain a transparent solution;

[0028] 2. Transfer the above solution to the reactor and react at 180 °C for 10 h;

[0029] 3 After the product is centrifuged and washed, it is dried to obtain α-Fe with a side length of 0.14-0.19 μm 2 o 3 cubes.

Embodiment 2

[0031] 1 Add 0.676 g of ferric chloride hexahydrate and 1.200 g of urea into 25 mL of ethanol solvent, and stir to obtain a transparent solution;

[0032] 2. Transfer the above solution to the reactor and react at 200 °C for 16 h;

[0033] 3 After the product is centrifuged and washed, it is dried to obtain α-Fe with a side length of 0.31-0.44 μm 2 o 3 cubes, such as figure 1 shown.

Embodiment 3

[0035] 1. Add 0.676 g of ferric chloride hexahydrate and 1.800 g of urea into 25 mL of ethanol solvent, and stir to obtain a transparent solution;

[0036] 2. Transfer the above solution to the reactor and react at 200 °C for 16 h;

[0037] 3 After the product is centrifuged and washed, it is dried to obtain α-Fe with a side length of 0.45-0.53 μm 2 o 3 cubes, such as figure 2 shown.

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Abstract

The invention discloses a preparation method of alpha-Fe2O3 cubes. The preparation method comprises the following steps: by taking an iron salt as an iron source and urea as a hydroxide ion initiator and adding the two materials to an alcohol solvent, and stirring so that the raw materials can be mixed evenly to obtain a precursor solution of a solvothermal reaction; heating the precursor solution to the range of 180-220 DEG C and preserving heat for reacting for 6-36 hours; centrifuging the product after cooling, washing the obtained deposition phase, and after washing, drying the obtained deposition phase to obtain the alpha-Fe2O3 cubes which are controllable in dimension and the edges of the cubes are 0.1-1.0 micron long. The preparation method of the alpha-Fe2O3 cubes has the advantages that the raw material cost is low, the preparation process is simple, the alpha-Fe2O3 cubes different in edge length can be obtained by changing the addition ratio and the concentrations of the iron salt and the urea, the reaction temperature and the heat preservation time, nucleation is easy to control in the reaction process, the yield of the product is high, and large-scale synthesis of the micron / nano-scale alpha-Fe2O3 cubes can be realized.

Description

technical field [0001] The invention relates to a kind of α-Fe in the technical field of chemical engineering 2 o 3 Cube preparation method, especially involving a controllable side length α-Fe 2 o 3 Cube preparation method. Background technique [0002] Iron oxide is an important class of transition metal oxide materials. It has the advantages of non-toxicity, low price, good stability, and good physical and chemical properties. It has a wide range of applications and can be used as sensitive materials, catalytic materials, and optical and electronic devices. , magnetic recording materials, etc., arouse people's research interest. α-Fe 2 o 3 It is the most thermodynamically stable phase of iron oxide, its energy gap is 2.1eV, and it has a large specific surface area. It shows excellent characteristics in catalysis, biomedical engineering, and gas sensing. [0003] In recent years, a variety of micro-nanoscale α-Fe has been prepared by liquid-phase or gas-phase synthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/06
Inventor 马谦杨萍卢盼盼车全德王俊鹏
Owner UNIV OF JINAN