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Nano-copper-based two-dimensional sheet-like cerium oxide nanomaterial and its synthesis method and application

A technology of nanomaterials and synthesis methods, which is applied in the field of preparation of two-dimensional flake cerium oxide nanomaterials, can solve the problems of long preparation period, difficult removal of surfactants, secondary pollution, etc., and achieves good surface wrapping quality, simplicity and convenience. manipulation effect

Active Publication Date: 2020-12-08
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the above-mentioned existing schemes still have the following defects or deficiencies: firstly, such methods are relatively complicated, the preparation period is long, the hydrothermal reaction requires high temperature, and the energy consumption is large; secondly, they usually require the use of alcohol amines, surfactants , but these surfactants are difficult to remove in the later stage and are likely to cause secondary pollution

Method used

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  • Nano-copper-based two-dimensional sheet-like cerium oxide nanomaterial and its synthesis method and application
  • Nano-copper-based two-dimensional sheet-like cerium oxide nanomaterial and its synthesis method and application
  • Nano-copper-based two-dimensional sheet-like cerium oxide nanomaterial and its synthesis method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0055] Disperse 0.3g of nano-copper powder in 4ml of 15% hydrogen peroxide, soak for 10min, add 10ml of 10% ammonia water, and stir in the beaker at a speed of 400rpm for 2h. Due to the reaction between the oxide layer and ammonia water, the mixed solution will appear pale. Blue, drop 2ml of cerium nitrate with a mass fraction of 30% into the mixed solution to obtain a gray precipitate, stir at 400rpm and age for 20min, collect the precipitate sample and wash it with deionized water, then centrifuge at 6000rpm, repeat washing and centrifugation 5 times, Dry in an oven at 80°C for 24h to obtain nano-copper-based two-dimensional sheet-like cerium oxide nanomaterials.

Embodiment 2

[0057] Disperse 0.2g of nano-copper powder in 4ml of 15% hydrogen peroxide, soak for 10min, add 10ml of 10% ammonia water, stir in the beaker at 400rpm for 1h, the mixed solution appears light blue, add 2ml of the mixed solution dropwise The mass fraction was 30% cerium nitrate to obtain gray precipitate, stirred at 400rpm, aged for 20min, collected samples were washed with deionized water, then centrifuged at 8000rpm, washed and centrifuged repeatedly for 4 times, dried in an oven at 90°C for 18h to obtain nano-copper-based bismuth Dimensional sheet-like cerium oxide nanomaterials.

Embodiment 3

[0059] Disperse 0.3g of nano-copper powder in 4ml of 15% hydrogen peroxide, soak for 15min, add 10ml of 10% ammonia water, stir in the beaker at 400rpm for 30min, the mixed solution appears light blue, add 2ml of the mixed solution dropwise The mass fraction is 30% cerium nitrate to obtain a gray precipitate, stir at 400rpm, and after aging for 20min, collect the sample and wash it with deionized water, then centrifuge at 7000rpm, repeat the washing and centrifugation for 5 times, and dry in an oven at 100°C for 12h to obtain nano-copper-based bismuth Dimensional sheet-like cerium oxide nanomaterials.

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Abstract

The invention belongs to the field of two dimensional sheet shape cerium oxide nano material preparation, and discloses a nano copper based two dimensional sheet shape cerium oxide nano material and asynthesis method and applications thereof. The synthesis method comprises following steps: adding nano particles into hydrogen peroxide, soaking, stirring, adding ammonia water to corrode the surface, adding a cerium nitrate solution, keeping on stirring, adjusting the pH of the mixed solution to 9-11; washing the precipitates by water, carrying out centrifugation, and fully drying to obtain thecopper based two dimensional sheet shape cerium oxide nano material. The synthesized cerium oxide material has a two dimensional sheet shape structure, grows on the surface of copper nano particles, and has a potential application value in fields such as water gas conversion, VOC exhaust gas catalytic treatment, solid oxide fuel cells, industrial carbon dioxide catalytic reduction, and the like. During the synthesis process, no surfactant is added, the post treatment steps such as organic solvent washing, high temperature calcining, and the like, are eliminated, and the energy consumption andpollution are reduced.

Description

technical field [0001] The invention belongs to the field of preparation of two-dimensional sheet-shaped cerium oxide nanomaterials, and relates to a nano-copper-based two-dimensional sheet-shaped cerium oxide nanomaterial and its synthesis method and application. More specifically, it relates to a two-dimensional sheet grown on the surface of copper nanoparticles Synthesis method of nano-materials like cerium oxide, which can be used for CO 2 Hydrogenation Catalytic Applications. Background technique [0002] Nano cerium oxide has strong oxygen exchange capacity and oxygen storage capacity and is widely used in many fields such as petrochemical industry, automobile exhaust purification, mechanical polishing and so on. In recent years, with the development and research on the performance of cerium oxide, it has been found that different crystal faces of cerium oxide have huge differences in CO oxidation and water gas shift reaction activities due to differences in oxygen va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01F17/235C01F17/10B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00C01P2002/72C01P2004/03C01P2004/20
Inventor 张立麒鲁博文徐勇庆张泽武李诗谙支昕宇申成邹杰赵征鸿
Owner HUAZHONG UNIV OF SCI & TECH
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