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A kind of ceria nanorod and its preparation method and application

A ceria and nanorod technology is applied to the preparation of ceria nanorods and the field of nanorods, which can solve the problems of high preparation cycle preparation cost, cumbersome preparation process, difficult popularization and application, etc., and achieves simple and controllable preparation method, The preparation process is cumbersome and the preparation cycle is short.

Active Publication Date: 2017-06-16
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preparation process of this method is cumbersome and the cycle is long
[0004] Therefore, the complexity of the raw materials and the long preparation cycle of the existing ceria nanorod preparation method determine its high preparation cost and is not easy to be popularized and applied.

Method used

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  • A kind of ceria nanorod and its preparation method and application
  • A kind of ceria nanorod and its preparation method and application
  • A kind of ceria nanorod and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] In the present embodiment, the preparation method adopted is as follows:

[0032] Add 1.0 g of cerium nitrate into 10 ml of tetraethylammonium hydroxide (20 wt%), hydrolyze and stir for 0.5 h to form a brown mixture, and then add the brown mixture into the hydrothermal reaction kettle. Put the reaction kettle in an oven and keep the temperature at 80°C for 12h. Then, the obtained mixed solution was washed four times with deionized water, placed in a vacuum drying oven, dried at 100° C. for 12 hours, and then calcined at 300° C. for 0.5 h to obtain ceria nanorods.

[0033] Such as figure 1 Shown is the SEM image of the cerium oxide prepared in this example, which presents a good nanorod structure.

[0034] Such as figure 2 Shown are the XRD patterns of ceria nanorods and irregular ceria prepared in this example. It can be seen from the figure that both of them present cubic fluorite structure CeO 2 (PDF-ICDD34-0394).

[0035] Such as image 3 As shown, the use of ...

Embodiment 2

[0037] In the present embodiment, the preparation method adopted is as follows:

[0038] Add 1.5 g of cerium nitrate into 12 ml of tetraethylammonium hydroxide (25 wt%), hydrolyze and stir for 0.5 h to form a brown mixture, and then add the brown mixture into the hydrothermal reaction kettle. Put the reaction kettle in an oven and keep the temperature at 75°C for 12h. Then, the obtained mixed solution was washed four times with deionized water, placed in a vacuum drying oven, dried at 100°C for 14 hours, and then calcined at 320°C for 0.6h to obtain ceria nanorods.

Embodiment 3

[0040] In the present embodiment, the preparation method adopted is as follows:

[0041] Add 0.8 g of cerium nitrate into 10 ml of tetraethylammonium hydroxide (18 wt%), hydrolyze and stir for 0.5 h to form a brown mixture, and then add the brown mixture into the hydrothermal reaction kettle. Put the reaction kettle in an oven and keep the temperature at 85°C for 12h. Then, the obtained mixed solution was washed four times with deionized water, placed in a vacuum drying oven, dried at 100° C. for 10 hours, and then calcined at 280° C. for 0.5 h to obtain ceria nanorods.

[0042] The present invention compares the ceria nanorods prepared in the above three examples, and finds that although the ceria nanorods can also be obtained in the second and third examples, the structure is not as good as that obtained in the first example. .

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Abstract

The invention discloses a cerium dioxide nanorod and its preparation method and application. The preparation method of ceria nanorods of the present invention can obtain regular and complete ceria nanorods by mixing and hydrolyzing cerium nitrate and tetraethylammonium hydroxide, storing the obtained brown mixture at a constant temperature, and calcining the obtained product. Cerium oxide nanorods. The present invention successfully prepares ceria nanorods, and the preparation method of the present invention only requires two raw materials. After several processes such as mixing, constant temperature storage, drying, and calcination, the preparation can be completed in no more than 30 hours. , simple and controllable, short preparation cycle, good repeatability, has good applications in environmental catalytic materials, and laid a good foundation for the research and development of nanofunctional materials.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and in particular relates to a method for preparing ceria nanorods, the prepared nanorods and applications thereof. Background technique [0002] Cerium oxide is a rare earth oxide, which is widely used in the field of catalysis due to its very good oxygen storage capacity and oxygen release capacity as well as good redox capacity. Especially nano ceria, the unique shape, size and structure can affect its surface properties and then affect its catalytic activity. By adjusting the morphology of nano-ceria, the crystal face of specific energy can be selectively exposed, thereby greatly improving the catalytic activity, selectivity and stability of nano-ceria. In some catalytic fields, the catalytic activity of nanorod ceria is better than that of nanoparticle ceria, but the preparation method of nanorod ceria is complicated and the preparation period is long. [0003] Chinese pat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/00B82Y30/00B82Y40/00B01J23/10
CPCB82Y30/00B82Y40/00B01J23/10C01P2004/03C01P2004/16C01P2002/72C01P2004/64C01F17/206B01J35/40
Inventor 刘彩霞陈冠益刘庆岭付振超
Owner TIANJIN UNIV
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