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Preparation method of thorium dioxide nano material

A technology of nanomaterials and thorium dioxide, which is applied in the field of nanomaterials to achieve the effects of controllable morphology, good catalytic activity and light agglomeration

Pending Publication Date: 2020-07-24
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] Although there are many ThO 2 However, large-scale preparation of ThO with controllable morphology, light agglomeration, uniform particle size, high specific surface area, and good catalytic activity 2 Ceramic nanopowders still need to work hard

Method used

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  • Preparation method of thorium dioxide nano material
  • Preparation method of thorium dioxide nano material
  • Preparation method of thorium dioxide nano material

Examples

Experimental program
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Effect test

Embodiment 1

[0019] Add 5 mL of 0.5 mol / L thorium nitrate solution dropwise to 75 mL of 5 mol / L sodium hydroxide solution, and stir the mixed solution at room temperature for 30 min. Subsequently, the mixed solution was transferred into a 100mL polytetrafluoroethylene-lined stainless steel reactor, and placed in an oven at 80°C and 0.6MPa for 48h. After cooling to room temperature, wash with ultrapure water to pH = 7.5, dry and grind at 60°C to obtain ThO 2 White powder.

[0020] Produced ThO 2 The white powder was determined, XRD pattern and ThO 2 Corresponding to standard PDF card 65-0291 (see figure 1 ); the results of scanning electron microscopy showed that (see figure 2 ), the particle size is relatively uniform, the average grain size is 8.7nm, and the dispersion is good.

Embodiment 2

[0022] Add 5 mL of 0.8 mol / L thorium nitrate solution dropwise into 75 mL of 6.4 mol / L sodium hydroxide solution, and stir the mixed solution at room temperature for 30 min. Subsequently, the mixed solution was transferred into a 100mL polytetrafluoroethylene-lined stainless steel reactor, and placed in an oven at 90°C and 0.7MPa for 30h. After cooling to room temperature, wash with ultrapure water to pH = 8.0, dry and grind at 60°C to obtain ThO 2 White powder.

[0023] Produced ThO 2 The white powder was determined, XRD pattern and ThO 2 Corresponding to standard PDF card 65-0291 (see figure 1 ); the results of scanning electron microscopy showed that (see image 3 ), the particle size is relatively uniform, the average grain size is 8.9nm, and the dispersion is good.

Embodiment 3

[0025] Add 5 mL of 1.0 mol / L thorium nitrate solution dropwise into 75 mL of 8 mol / L sodium hydroxide solution, and stir the mixed solution at room temperature for 30 min. Subsequently, the mixed solution was transferred into a 100mL polytetrafluoroethylene-lined stainless steel reactor, and placed in an oven at 100°C and 0.8MPa for 18h. After cooling to room temperature, wash with ultrapure water to pH = 8.5, dry and grind at 60°C to obtain ThO 2 White powder.

[0026] Produced ThO 2 The white powder was determined, XRD pattern and ThO 2 Corresponding to standard PDF card 65-0291 (see figure 1 ); the results of scanning electron microscopy showed that (see Figure 4 ), the particle size is relatively uniform, the average grain size is 9.6nm, and the dispersion is good.

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Abstract

The invention belongs to the technical field of nano materials, and relates to a preparation method of a thorium dioxide nano material. The preparation method comprises the following steps: uniformlymixing a thorium nitrate solution and a sodium hydroxide solution, adding the mixture into a reaction kettle for hydrothermal reaction, cooling the reaction product to room temperature, washing the reaction product with water until the pH value is 7.5-8.5, drying and grinding to obtain the thorium dioxide nano material. With application of the preparation method of the thorium dioxide nano material, ThO2 ceramic nano-powder with controllable morphology, light agglomeration, uniform particle size, high specific surface area and good catalytic activity can be prepared on a large scale.

Description

technical field [0001] The invention belongs to the technical field of nanometer materials and relates to a preparation method of thorium dioxide nanomaterials. Background technique [0002] Thorium dioxide (ThO 2 ), as an actinide metal oxide, is not only an important nuclear fuel, but also has a wide range of applications in the fields of adsorption and catalysis. In order to obtain ThO with better comprehensive performance 2 , scientists have tried different preparation methods and raw materials. [0003] Chen et al. used the oxalic acid precipitation method to react thorium nitrate solution with oxalic acid and then calcined ThO 2 powder. Using radiation method, Liu et al. used soluble thorium complexes (NH 4 ) 4 Th(C 2 o 4 ) 4 As a reactant, a micron-sized insoluble precursor is obtained, and then sintered at 600°C to obtain ThO 2 micron particles. Mishra et al synthesized ThO containing crystal water by precipitation method 2 , found that its effect on Ba i...

Claims

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Application Information

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IPC IPC(8): C01F15/00B82Y40/00C04B35/626C04B35/51
CPCB82Y40/00C01F15/00C01P2002/72C01P2004/03C01P2004/64C04B35/51C04B35/626
Inventor 肖松涛赵耀林欧阳应根王玲钰左锋叶国安
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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