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Nano cerium dioxide and preparation method thereof

A nano-ceria, cerium nitrate technology, applied in chemical instruments and methods, nanotechnology, rare earth metal oxides/hydroxides, etc., can solve the problems of complex preparation methods of nano-ceria, and achieve good application prospects, The effect of avoiding agglomeration and simple process

Active Publication Date: 2018-03-23
上海映智研磨材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the above-mentioned shortcoming of prior art, the object of the present invention is to provide a kind of nano ceria and preparation method thereof, be used to solve the comparatively complicated problem of nano ceria preparation method in the prior art

Method used

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  • Nano cerium dioxide and preparation method thereof
  • Nano cerium dioxide and preparation method thereof
  • Nano cerium dioxide and preparation method thereof

Examples

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Effect test

Embodiment 1

[0043] (1) Dissolve 2.21g of KH550 in 45mL of distilled water, and add 4.34g of cerium nitrate under stirring until completely dissolved to obtain solution A. Then 4.24g of cerium nitrate was dissolved in 45ml of distilled water, and 2.21g of KH550 was added to obtain solution B with precipitation.

[0044] (2) The above solution A and solution B were transferred to a 60mL stainless steel hydrothermal reaction kettle with a Teflon lining and sealed, placed in an oven, heated to 140°C, and hydrothermally reacted for 24 hours.

[0045] (3) After the reaction is completed, after cooling to room temperature, the obtained pale yellow solid precipitate is centrifuged and washed three times with distilled water, washed twice with ethanol, and finally vacuum-dried at 45°C for 8 hours, and ground to obtain spherical nano-dioxide with ultra-small particle size. Cerium particles.

[0046] figure 1 For the XRD spectrum of the ceria nanoparticles prepared for this embodiment, the crystal...

Embodiment 2

[0050] (1) Dissolve 1.10g of KH550 in 45mL of distilled water, and add 2.17g of cerium nitrate under stirring until completely dissolved. Then 4.24g of cerium nitrate was dissolved in 45ml of distilled water, and 2.21g of KH550 was added to obtain solution B with precipitation.

[0051] (2) The above solution A and solution B were transferred to a 60mL stainless steel hydrothermal reaction kettle with a Teflon lining and sealed, placed in an oven, heated to 100°C, and hydrothermally reacted for 48 hours.

[0052] (3) After the reaction is completed, after cooling to room temperature, the obtained pale yellow solid precipitate is centrifuged and washed three times with distilled water, washed twice with ethanol, and finally vacuum-dried at 30°C for 18 hours, and ground to obtain spherical nano-dioxide with ultra-small particle size. Cerium particles.

[0053] image 3 The TEM image of the ceria nanoparticles prepared in this example, the particle size of the nanospheres is 3-...

Embodiment 3

[0057] (1) Dissolve 1.10g of KH550 in 45mL of distilled water, and add 4.34g of cerium nitrate under stirring until completely dissolved. Then 4.24g of cerium nitrate was dissolved in 45ml of distilled water, and 2.21g of KH550 was added to obtain solution B with precipitation.

[0058] (2) The above solution A and solution B were transferred to a 60mL stainless steel hydrothermal reaction kettle with a Teflon lining and sealed, placed in an oven, heated to 140°C, and hydrothermally reacted for 12 hours.

[0059] (3) After the reaction is completed, after cooling to room temperature, the obtained pale yellow solid precipitate is centrifuged and washed three times with distilled water, washed twice with ethanol, and finally vacuum-dried at 50°C for 5 hours, and ground to obtain spherical nano-dioxide with ultra-small particle size. Cerium particles.

[0060] Figure 5 The TEM image of the ceria nanoparticles prepared for this example shows that the nanospheres have a particle...

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Abstract

The invention provides nano cerium dioxide and a preparation method thereof. The preparation method at least comprises the following steps: adding a first silane coupling agent solution into cerium nitrate to obtain a solution A; adding a second silane coupling agent into a cerium nitrate solution to obtain a solution B with precipitate; and mixing the solution A with the solution B, and reactingunder a sealed system to obtain a product. The method is simple; one-step synthesis is achieved; the annealing treatment is not needed.

Description

Technical field [0001] The invention relates to nanometer cerium dioxide and a preparation method thereof. Background technology [0002] The performance of nanomaterials has been greatly improved compared to their bulk form, and nanomaterials with ultra-small particle sizes often have many new physical and chemical properties. Therefore, the preparation of nanomaterials with ultra-small particle sizes has become a research topic in the field of nanotechnology in recent years. One of the hot spots. Among them, nanometer cerium dioxide has a wide range of applications in automobile exhaust control, sewage treatment, electrode materials, chemical mechanical polishing and other fields because it has more oxygen vacancies and a higher specific surface area. [0003] At present, the hydrothermal method is one of the main methods for preparing nanometer cerium dioxide. Compared with other methods, nanoparticles prepared by the hydrothermal method have the advantages of good crys...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00B82Y40/00
CPCB82Y40/00C01P2002/01C01P2002/70C01P2002/72C01P2004/04C01P2004/32C01P2004/64C01F17/206
Inventor 张泽芳张文娟
Owner 上海映智研磨材料有限公司
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