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Porous nanosheet based NiCo2O4 nanotubes applied to high-effective carbon soot catalytic elimination

A technology of nanosheets and nanotubes, which is applied in the field of porous nanosheet-based NiCo2O4 nanotube structure materials and their preparation, which can solve problems such as hindering applications, aggregation and sintering of two-dimensional nanosheets, and achieve low cost and good soot removal performance , the effect of large specific surface area

Inactive Publication Date: 2020-03-10
TIANJIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the nanosheet array structure can improve the contact between catalysts and soot particles, compared with catalysts with macroporous structures, it inevitably limits the diffusion of gaseous reactants and solid reactants and products.
Two-dimensional nanosheets have great potential in photocatalysis and electrocatalysis, but they are prone to aggregation and sintering during heat treatment, which seriously hinders their application in thermocatalytic reactions.

Method used

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  • Porous nanosheet based NiCo2O4 nanotubes applied to high-effective carbon soot catalytic elimination
  • Porous nanosheet based NiCo2O4 nanotubes applied to high-effective carbon soot catalytic elimination
  • Porous nanosheet based NiCo2O4 nanotubes applied to high-effective carbon soot catalytic elimination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] Step 1: Weigh 0.40g of L-aspartic acid and 0.83g of cobalt nitrate in a 50mL autoclave, add 15mL of deionized water and 15mL of ethylene glycol, stir magnetically at room temperature for 30 minutes, and then continue to mix Add 3mL of 2mol / L sodium hydroxide aqueous solution dropwise into the solution until the solution turns transparent brownish-red and the pH is 6.5. After continuing magnetic stirring at room temperature for 1 hour, it is sealed and placed in an oven at 180°C for 5 hours.

[0038] Step 2: After the temperature of the autoclave in step 1 is cooled, the supernatant is poured off, the pink precipitate is collected, washed with ethanol and water by centrifugation, and a one-dimensional Co-Asp nanowire structure product is obtained.

[0039] Step 3: Divide the Co-Asp nanowires obtained in step 2 into two parts, place them in a 50mL autoclave, add 20mL of absolute ethanol, 10mL of water and 160mg of nickel nitrate hexahydrate (limited to the reaction volume ...

Embodiment 2

[0043] Step 1: Weigh 0.20g of L-aspartic acid and 0.415g of cobalt nitrate in a 50mL autoclave, add 15mL of deionized water and 15mL of ethylene glycol, stir magnetically at room temperature for 30 minutes, and then continue to mix Add 3 mL of 2 mol / L sodium hydroxide solution dropwise into the solution until the solution turns a transparent brownish-red color and the pH is 6.7. After continuing magnetic stirring at room temperature for 1 hour, it is sealed and placed in an oven at 160°C for 10 hours.

[0044] Step 2: After the temperature of the autoclave in step 1 is cooled, the supernatant is poured off, the pink precipitate is collected, washed with ethanol and water by centrifugation, and a one-dimensional Co-Asp nanowire structure product is obtained.

[0045] Step 3: Put the Co-Asp nanowires obtained in Step 2 into a 50mL autoclave, add 20mL of absolute ethanol, 10mL of water and 160mg of nickel nitrate hexahydrate, stir magnetically at room temperature for 1 hour, and s...

Embodiment 3

[0049] Step 1: Weigh 0.40g of L-aspartic acid and 0.83g of cobalt nitrate in a 50mL autoclave, add 15mL of deionized water and 15mL of ethylene glycol, stir magnetically at room temperature for 30 minutes, and then continue to mix Add 3 mL of 2 mol / L sodium hydroxide solution dropwise into the solution until the solution turns a transparent brownish-red color with a pH of 6.2, continue magnetic stirring at room temperature for 1 hour, and then seal it and place it in an oven at 200°C for 5 hours.

[0050] Step 2: After the temperature of the autoclave in step 1 is cooled, the supernatant is poured off, the pink precipitate is collected, washed with ethanol and water by centrifugation, and a one-dimensional Co-Asp nanowire structure product is obtained.

[0051] Step 3: Divide the Co-based nanowires obtained in step 2 into two parts, place them in a 50mL autoclave, add 20mL of absolute ethanol, 10mL of water and 160mg of nickel nitrate hexahydrate, and stir magnetically at room ...

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Abstract

The invention discloses porous nanosheet based NiCo2O4 nanotubes applied to high-effective carbon soot catalytic elimination. The porous nanosheet based NiCo2O4 nanotubes include one-dimensional hollow tubes and ultrathin nanosheets growing on the tube walls. Through simple hydrothermal reaction with cobalt based nanowires being a template, the CoNi-Asp nanosheet based nanotubes are prepared through self-diffusion of Kirkendall effect and further a cation exchange reaction with nickel ions, then annealing reaction is carried to obtain the product. The Hierarchical porous nanosheet based NiCo2O4 nanotubes have an opened structure and hollowed interior and are in a hierarchical porous structure, have more active sites, have stable structure, and have significant advantage in carbon soot co-elimination.

Description

[0001] The application of the present invention is a divisional application of the parent application "a layered porous NiCo2O4 nanosheet-based nanotube structure material and its preparation method and application". The application date of the parent application is August 29, 2018, and the application number is 2018109966364. technical field [0002] The invention relates to the technical field of nanomaterials and soot catalytic elimination, in particular to a porous nanosheet-based NiCo 2 o 4 Nanotube structure material, its preparation method and its application in catalytic removal of soot. Background technique [0003] The soot particles (Soot) released by diesel engines will cause serious harm to the environment and human health that human beings depend on for survival. At present, diesel particulate filter (DPF) combined with soot catalytic oxidizer technology is considered to be one of the most effective methods to eliminate diesel soot. In recent years, the NO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/755B01J35/10F01N3/10F01N3/02B01D53/94B01D53/56
CPCB01J23/755B01J23/005F01N3/10F01N3/02B01D53/9413B01D2258/01F01N2570/14B01J35/647
Inventor 张兵古柳于一夫纪岩黄义
Owner TIANJIN UNIV
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