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Preparation method of cerium dioxide nanorod photocatalyst

A ceria, photocatalyst technology, applied in catalyst activation/preparation, physical/chemical process catalyst, metal/metal oxide/metal hydroxide catalyst, etc., can solve the problems of troublesome preparation, reduced yield and high requirements , to achieve the effect of simple use, less energy consumption and good activity

Inactive Publication Date: 2017-10-13
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] At present, there have been some methods for the preparation of ceria nanorods, but many preparation methods have the problems of troublesome preparation and waste of raw materials
For example, in the method written in the patent (CN104445339A), cerium acetate is mixed with ammonia water, heated by microwaves, and fired at high temperature to obtain finished products. This method has high requirements on the environment, and there will be waste of raw materials.
As mentioned in the patent (CN104891550A), by using a mixed precipitant to prepare ceria, the method has many steps, and the required amount of various reactants must be very precise, which is troublesome in preparation, and after so many steps, it will lead to a decrease in yield
As mentioned in the patent (CN105502468A), cerium oxide nanorods are prepared by combining cerium nitrate and tetraethylammonium hydroxide through a series of steps. The nanorods prepared by this method are too large and the specific surface area of ​​oxygen vacancies is small. , will weaken the catalytic performance

Method used

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Experimental program
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Effect test

Embodiment 1

[0030] A preparation method of ceria nanorod photocatalyst, the steps are as follows:

[0031] Preparation of type A ceria nanorod monomer

[0032] 1.5g CeCl3•7H 2 O was dissolved in 5ml deionized water to make liquid A, 2.4g NaOH was dissolved in 15ml deionized water to make liquid B, mixed liquid A and liquid B, stirred for 10min, then added the mixed solution into the reaction kettle, 130°C After reacting at low temperature for 18 hours, the obtained product was washed with deionized water, then reacted and dried at room temperature for 20 hours, and continued to be calcined at 300°C for 4 hours to obtain the A-type ceria nanorod monomer and the A-type ceria nanorod monomer Abbreviated as 3M CeO 2 .

Embodiment 2

[0034] Preparation of B-type ceria nanorod monomer

[0035] 1.5g CeCl3•7H 2O was dissolved in 5ml of deionized water to make liquid A, 4g NaOH was dissolved in 15ml of deionized water to make liquid B, mixed liquid A and liquid B, stirred for 10min, then added the mixed solution into the reaction kettle, at 130°C After reacting for 18 hours, the obtained product was washed with deionized water, then reacted and dried at room temperature for 20 hours, and continued to be calcined at 300°C for 4 hours to obtain B-type ceria nanorod monomer, which is referred to as B-type ceria nanorod monomer 5M CeO 2 .

Embodiment 3

[0037] A preparation method of ceria nanorod photocatalyst, the steps are as follows:

[0038] Preparation of C-type ceria nanorod monomer

[0039] 1.5g CeCl3•7H 2 O was dissolved in 5ml deionized water to make liquid A, 6.4g NaOH was dissolved in 15ml deionized water to make liquid B, mixed liquid A and liquid B, stirred for 10min, then added the mixed solution into the reaction kettle, 130°C After reacting at low temperature for 18 hours, the obtained product was washed with deionized water, then reacted and dried at room temperature for 20 hours, and continued to be calcined at 300 ° C for 4 hours to obtain C-type ceria nanorod monomer, C-type ceria nanorod monomer Abbreviated as 8M CeO 2 .

[0040] It can be seen from the accompanying drawings in the description that the light absorption capabilities of three different ceria nanorods are not the same, and 5M CeO 2 The nanorods have the strongest light absorption range, reaching 436nm (this result is obtained by making ...

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Abstract

The invention relates to a preparation method of a cerium dioxide nanorod photocatalyst. By controlling variables, three nanorod monomers with different morphologies are prepared; furthermore, the nanorod monomer with the best photocatalytic performance is chosen out. According to the preparation method, cerous chloride heptahydrate, sodium hydroxide and deionized water are utilized as raw materials, and the cerium dioxide nanorod photocatalyst monomer is prepared by a hydrothermal method. An experiment can be used for researching photocatalytic performance of the cerium dioxide nanorod photocatalyst monomer by preparing three cerium dioxide nanorod monomers with different morphologies, and blank in researching the photocatalytic performance of the cerium dioxide nanorod monomer is filled up.

Description

technical field [0001] The invention relates to a method for preparing a ceria nanorod photocatalyst, belonging to the technical field of photocatalysts. Background technique [0002] With the development of science and technology, the living standard of human beings is also gradually improved. Since the two industrial revolutions, the productivity of society has been greatly improved, but the living environment of human beings is deteriorating, and various pollutions follow. Smog, water pollution, etc. followed one after another. Many big cities are plagued by smog repeatedly, and the pm2.5 index only increases, and sometimes it is gray one hundred meters away, which not only affects traffic safety, but also causes great harm to human bodies. As we all know, water gives birth to life, and water has a great effect on human beings. But now the water pollution is extremely serious, and there are many pollutants floating in the river, not only the plastic bags on the surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/10B01J35/02B01J37/03B01J37/08
CPCB01J23/10B01J37/031B01J37/082B01J35/393B01J35/23B01J35/40B01J35/39
Inventor 谢宇宋健华肖针宋冬冬黄子毅项文翔凌云孙雨欣李佩
Owner NANCHANG HANGKONG UNIVERSITY
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