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Method for preparing active porous nano-cerium dioxide based on inorganic template

A nano-ceria, inorganic template technology, applied in inorganic chemistry, chemical instruments and methods, rare earth metal oxides/hydroxides, etc., can solve problems such as limiting the development of ceria, harsh reaction conditions, and uneven size , to achieve the effects of good peroxidase activity, low preparation cost and simple preparation method

Inactive Publication Date: 2017-12-29
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the use of metal-inorganic templates to prepare ceria, and the ceria prepared by the prior art has problems such as uneven size, easy agglomeration of particles, 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 inorganic template
  • Method for preparing active porous nano-cerium dioxide based on inorganic template

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] (1) Add 0.5g Ce(NO 3 ) 3 •6H 2 O and 2.5 g NH 4 HCO 3 were added to 30mL and 15mL of deionized water, stirred for 2min to dissolve, and Ce(NO 3 ) 3 solution and NH 4 HCO 3 solution;

[0018] (2) Use CH 3 COOH NH 4 HCO 3 The pH of the solution was adjusted to 6.5, and then it was added to Ce(NO 3 ) 3 In the solution, continue to stir for 1 min after the addition, then seal the system and place it in an environment of 6°C to react for 6 h;

[0019] (3) Centrifuge after the reaction is complete, wash the resulting white product with deionized water and ethanol solution several times, and then dry it in air at 60°C for 12 hours;

[0020] (4) Calcinate the dried product in air at 450°C for 1.5h to obtain porous CeO 2 nanoparticles.

Embodiment 2

[0022] (1) Add 0.5g Ce(NO 3 ) 3 •6H 2 O and 2.5 g NH 4 HCO 3 were added to 30mL and 15mL of deionized water, stirred for 2min to dissolve, and Ce(NO 3 ) 3 solution and NH 4 HCO 3 solution;

[0023] (2) Use CH 3 COOH NH 4 HCO 3 The pH of the solution was adjusted to 7.0, and then it was added to Ce(NO 3 ) 3 In the solution, continue to stir for 1 min after the addition, then seal the system and place it in an environment of 6°C to react for 6 h;

[0024] (3) Centrifuge after the reaction is complete, wash the resulting white product with deionized water and ethanol solution several times, and then dry it in air at 60°C for 12 hours;

[0025] (4) Calcinate the dried product in air at 450°C for 1.5h to obtain porous CeO 2 nanoparticles.

Embodiment 3

[0027] (1) Add 0.5g Ce(NO 3 ) 3 •6H 2 O and 2.5 g NH 4 HCO 3 were added to 30mL and 15mL of deionized water, stirred for 2min to dissolve, and Ce(NO 3 ) 3 solution and NH 4 HCO 3 solution;

[0028] (2) Use CH 3 COOH NH 4 HCO 3 The pH of the solution was adjusted to 7.5, and then it was added to Ce(NO 3 ) 3 In the solution, continue to stir for 1 min after the addition, then seal the system and place it in an environment of 6°C to react for 6 h;

[0029] (3) Centrifuge after the reaction is complete, wash the resulting white product with deionized water and ethanol solution several times, and then dry it in air at 60°C for 12 hours;

[0030] (4) Calcinate the dried product in air at 450°C for 1.5h to obtain porous CeO 2 nanoparticles.

[0031] figure 1 For the prepared CeO of embodiment 1 and embodiment 3 2 XRD diffraction pattern of nanoparticles.

[0032] With the CeO prepared by embodiment 1-3 2 The nanoparticles were dissolved in water respectively, and t...

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Abstract

The invention discloses a method for preparing active porous nano-cerium dioxide based on an inorganic template. Ammonium bicarbonate serves as a template material and is mixed with cerium nitrate, and then the template material is removed by high-temperature annealing to obtain porous CeO2 nanoparticles. The obtained CeO2 nanoparticles have the advantages of small size and particle size and the like, and have good peroxidase activity. The preparation method of the CeO2 nanoparticles has the advantages of simplicity, low preparation cost and the like, and large-scale popularization is benefited.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a method for preparing active porous nano ceria based on an inorganic 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 control of the process, 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 pu...

Claims

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Application Information

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IPC IPC(8): C01F17/00
CPCC01F17/206C01P2002/72
Inventor 张其清郭小斑孙新玉纪明宇伍久林
Owner FUZHOU UNIVERSITY
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