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Method for preparing active porous nano cerium dioxide based on organic template

A nano-cerium oxide and organic template technology, which is applied in chemical instruments and methods, inorganic chemistry, rare earth metal oxides/hydroxides, etc., can solve the problems of restricting the development of ceria, harsh reaction conditions, and easy particle agglomeration , to achieve good peroxidase activity, low preparation cost and strong operability

Active Publication Date: 2017-11-24
FUZHOU UNIV
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  • Application Information

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Problems solved by technology

At present, there is no report on the use of metal-organic templates to prepare ceria, and the ceria prepared by the prior art has problems such as uneven size, easy particle agglomeration, and harsh reaction conditions, which limit the development of ceria

Method used

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  • Method for preparing active porous nano cerium dioxide based on organic template
  • Method for preparing active porous nano cerium dioxide based on organic template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) Synthesis of precursor: 3 mL, 1.55 mmol of Ce(NO 3 ) 3 •6H 2 O solution and 20 mL, 67.1 mmol of 2-methylimidazole solution were mixed and stirred at room temperature for 6 h, the yellow precipitate obtained after centrifugation was washed with ethanol three times, and then dried in an oven at 80 ° C for 24 h to obtain the precursor;

[0016] (2) Synthesis of porous ceria nanoparticles: the obtained precursor was placed in a porcelain boat, put into a muffle furnace, and calcined in an air atmosphere at 300°C for 3 hours, and the obtained yellow powder was porous ceria nanoparticles.

Embodiment 2

[0018] (1) Synthesis of precursor: 3 mL, 1.55 mmol of Ce(NO 3 ) 3 •6H 2 O solution and 20 mL, 67.1 mmol of 2-methylimidazole solution were mixed and stirred at room temperature for 6 h, the yellow precipitate obtained after centrifugation was washed with ethanol three times, and then dried in an oven at 80 ° C for 24 h to obtain the precursor;

[0019] (2) Synthesis of porous ceria nanoparticles: the obtained precursor was placed in a porcelain boat, put into a muffle furnace, and calcined in an air atmosphere at 350°C for 3 hours, and the obtained yellow powder was porous ceria nanoparticles.

Embodiment 3

[0021] (1) Synthesis of precursor: 3 mL, 1.55 mmol of Ce(NO 3 ) 3 •6H 2 O solution and 20 mL, 67.1 mmol of 2-methylimidazole solution were mixed and stirred at room temperature for 6 h, the yellow precipitate obtained after centrifugation was washed with ethanol three times, and then dried in an oven at 80 ° C for 24 h to obtain the precursor;

[0022] (2) Synthesis of porous ceria nanoparticles: the obtained precursor was placed in a porcelain boat, put into a muffle furnace, and calcined in an air atmosphere at 400°C for 3 hours, and the obtained yellow powder was porous ceria nanoparticles.

[0023] figure 1 It is the XRD diffraction pattern of the ceria nanoparticles obtained in Examples 1-3.

[0024] The ceria nanoparticles obtained in Examples 1-3 were respectively dissolved in water, and then the solution was kinetically scanned at a wavelength of 652nm by using an ultraviolet spectrophotometer, and recorded every 30s. The peroxidase activity of the obtained porous ...

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Abstract

The invention discloses a method for preparing active porous nano cerium dioxide based on an organic template. The method comprises the following steps: adopting 2-methylimidazole as a template material, controlling a calcination atmosphere and a calcinations temperature, synthesizing porous CeO2 nano particles with uniform appearance. The CeO2 nano particles obtained by the invention have the characteristics of small size, small particle size and the like, have good peroxidase activity, have the advantages of simple preparation method, low preparation cost and the like, and facilitates the large-scale popularization.

Description

technical field [0001] The invention belongs to the field of material preparation, in particular to a method for preparing active porous nano ceria based on an organic template. Background technique [0002] The methods for preparing ceria nanoparticles mainly include precipitation method, sol-gel method and hydrothermal method. The precipitation method has the advantages of simple equipment, easy process control, high product purity, and easy commercialization. However, it is difficult to filter and wash the precipitate, and particle agglomeration is prone to occur at various stages. The sol-gel method is a common method for preparing nano-metal oxide particles under low temperature conditions. It has the advantages of high product purity, large specific surface area, and good dispersibility. However, the reaction time is long, the particles are easy to agglomerate and harden, and the cost of raw materials is high. . Nano-oxides with high purity and good dispersibility ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00
CPCC01F17/206C01P2002/72
Inventor 伍久林郭小斑孙新玉纪明宇张其清
Owner FUZHOU UNIV
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