Preparation method of butterfly-tie-shaped cerium dioxide

A technology of cerium dioxide and bow tie, applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., to achieve enhanced reaction efficiency, strong oxygen storage and release capabilities, electron transport capabilities, and high product purity

Inactive Publication Date: 2015-02-04
HEILONGJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a method for preparing bowtie-shaped cerium dioxide in order to solve the technical problem that the morphology of cerium dioxide prepared by the existing method is mainly rod-shaped, linear, tubular and spherical.

Method used

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  • Preparation method of butterfly-tie-shaped cerium dioxide
  • Preparation method of butterfly-tie-shaped cerium dioxide
  • Preparation method of butterfly-tie-shaped cerium dioxide

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specific Embodiment approach 1

[0017] Specific embodiment one: the preparation method of bowtie-shaped ceria in this embodiment is carried out according to the following steps:

[0018] 1. Add 0.01mol to 0.03mol of Ce(NO 3 ) 3 ·6H 2 O and 0.01mol~0.03mol L-cysteine ​​were mixed and added to 30ml of distilled water and stirred until completely dissolved, then 0.04mol~0.08mol NaOH was added, and the stirring was continued for 30min to obtain a mixed solution;

[0019] 2. Transfer the mixed solution into the reactor and react at 140°C to 180°C for 12h to 36h, take out the reactor and cool it down to room temperature naturally, wash the sample with distilled water until there is no impurity, filter, and store at 80°C to 100°C Dry for 12 hours, and then calcined at 400°C for 1 hour to obtain bowtie-shaped ceria.

specific Embodiment approach 2

[0020] Specific embodiment two: the difference between this embodiment and specific embodiment one is that the Ce(NO 3 ) 3 ·6H 2 The molar ratio of O to L-cysteine ​​is 3:1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0021] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that the Ce(NO 3 ) 3 ·6H 2 The molar ratio of O to L-cysteine ​​is 2:1. Others are different from the first or second specific embodiment.

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Abstract

The invention discloses a preparation method of butterfly-tie-shaped cerium dioxide, and relates to the preparation method of the cerium dioxide. The preparation method aims to solve the technical problems that the morphology of the cerium dioxide prepared by preparation methods in the prior art is mainly rod-shaped, line-shaped, tube-shaped and spherical. The preparation method comprises the following steps: first, mixing Ce(NO3)3.6H2O and L-cysteine, adding into distilled water and stirring until the Ce(NO3)3.6H2O and the L-cysteine are completely dissolved, then adding NaOH, and continuing to stir for 30 min to obtain a mixed liquid; and second, transferring the mixed liquid into a reaction kettle for reaction, naturally cooling to the room temperature, washing a sample with the distilled water until the sample being free of impurity, filtering, drying, and then calcining, thus obtaining the butterfly-tie-shaped cerium dioxide. The butterfly-tie-shaped cerium dioxide prepared by the preparation method is butterfly-tie-shaped, and both ends of the butterfly-tie-shaped cerium dioxide are bound-branch-shaped, the sample has complete morphology, the size is about 18 [mu]m, the size distribution is uniform, both ends of the sample are multilevel structures, and have pore structures. The preparation method belongs to the field of preparation of oxides.

Description

technical field [0001] The invention relates to a preparation method of cerium oxide. Background technique [0002] At present, rare earth materials play an irreplaceable role in military affairs, chemical industry, glass ceramics, agriculture, etc. China has abundant rare earth mineral resources and superior ore-forming conditions, which can be called unique advantages. The proven reserves rank first in the world. The rational use of rare earth resources will inevitably bring many benefits to my country's economic development. CeO 2 As an important rare earth oxide, due to its unique 4f electronic structure, it exhibits excellent oxygen storage and release capabilities and charge exchange capabilities. application. [0003] With the development of science and technology, many high-tech fields have higher and higher requirements for the performance of rare earth materials, and a large number of studies have shown that the shape of the material will have a great impact on t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/00
Inventor 刘春涛王阔刘艳莹谷宇刘洋
Owner HEILONGJIANG UNIV
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