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Method for preparing yttrium oxide micro-nano-materials based on hydrothermal technology regulation and control

A yttrium oxide, micro-nano technology, applied in the field of nanomaterials, can solve the problems such as difficulty in fully controllable synthesis of yttrium oxide morphology, particle size and structure, increase material preparation cost, etc. Unique, easily dispersible effects

Inactive Publication Date: 2011-05-25
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of these preparation methods use templates or require expensive organometallic compounds, which increases the cost of material preparation; in addition, these preparation methods still have certain difficulties in achieving fully controllable synthesis of yttrium oxide morphology, particle size and structure.

Method used

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  • Method for preparing yttrium oxide micro-nano-materials based on hydrothermal technology regulation and control
  • Method for preparing yttrium oxide micro-nano-materials based on hydrothermal technology regulation and control
  • Method for preparing yttrium oxide micro-nano-materials based on hydrothermal technology regulation and control

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Preparation of dumbbell-shaped yttrium oxide nanomaterials: 3.83 g Y(NO 3 ) 3 ·6H 2 O and 0.5 g of urea were dissolved in 38 mL of water, stirred to form a clear solution, transferred to a 50 mL autoclave (polytetrafluoroethylene lined, stainless steel shell), sealed, and hydrothermally treated at 140 °C for 12 hours. After the reaction, the reaction was taken out The kettle is naturally cooled to room temperature. The product was collected, washed with water, and dried to obtain a white precursor Y(OH)CO 3 , XRD characterization such as figure 2 Shown. Finally, the material is roasted in a 600 oC muffle furnace, dehydrated and decomposed to obtain dumbbell-shaped nano Y 2 O 3 , Collect to be tested. This sample is abbreviated as YCHD-140. The size and morphology of the product were characterized by scanning electron microscopy ( figure 1 -a, 1-b), XRD such as image 3 -a shown. Such as figure 1 As shown in -a, 1-b, YCHD-140 is about 50 ~ 70 μm in size and has a speci...

Embodiment 2

[0027] According to the preparation method of Example 1, except that the hydrothermal temperature of 140°C was changed to 180°C, the obtained precursor was characterized as figure 2 As shown, the final SEM picture of the micron yttrium oxide structure is as figure 1 -c and 1-d are shown, XRD characterization is as image 3 As shown in -b, Y can be seen from the figure 2 O 3 The shape of the dumbbell remains basically unchanged, but its secondary structure becomes a more regular rectangle.

Embodiment 3

[0029] According to the preparation method of Example 1, only the added amount of urea was changed to 1.0 g, dumbbell-shaped nano Y 2 O 3 Change to microsphere type Y 2 O 3 . The SEM photo of the product is as figure 1 As shown in -e, microspheres with a size of 2 to 4 μm are present. XRD as image 3 -c shown.

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Abstract

The invention provides a method for preparing yttrium oxide micro-nano-materials based on hydrothermal technology regulation and control. In the method, the yttrium oxide micro-nano-materials with different appearances are prepared by a hydrothermal reaction. The preparation method specifically comprises the following steps of: first, adding a certain amount of urea into yttrium-containing inorganic acid salt solution, and performing the hydrothermal reaction on the solution in a stainless steel high-pressure reaction kettle with a lining made from polytetrafluoroethylene for a period of time under a certain temperature to obtain a precursor of micro-nano yttrium oxide; then, colleting a product, washing the product with water, and drying the washed product to obtain a white precursor; and finally, roasting the precursor in a muffle furnace, and dewatering and decomposing to obtain a micro-nano-structural Y2O3. The control of the appearances and the sizes of the product are realized by controlling the parameters such as the adding amount of the urea in a reaction system, the temperature and the time of the hydrothermal reaction and the like. The method has a simple and easily implemented process, high reproducibility, mild experiment conditions, low cost and low price, and is suitable for industrial large-scale production.

Description

technical field [0001] The invention relates to a method for preparing yttrium oxide micro-nano materials with different shapes through the regulation and control of hydrothermal technology, which belongs to the field of nano-materials. Background technique [0002] In recent years, due to the unique properties of nanomaterials different from bulk materials and single molecules - surface effect, volume effect, quantum size effect and macroscopic quantum tunneling effect, etc. The important application in this aspect has attracted people's attention. Nanoparticles with nanoscale structural features, including stable clusters or artificial nanocrystals, nanoparticles, nanotubes, nanowires, nanomonolayers, and nanopores, can be used as structural units for the construction of new functional materials. With the in-depth research on nanomaterials, it is found that the critical size of particles that lead to changes in the properties of nanomaterials is not the same. The performa...

Claims

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Application Information

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IPC IPC(8): C01F17/00B82Y40/00
Inventor 吕弋张立春侯晓玲
Owner SICHUAN UNIV