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Multi-walled carbon nanotube-based noble metal catalyst and preparation method thereof

A technology of multi-walled carbon nanotubes and noble metal catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, organic compound/hydride/coordination complex catalysts, etc., can solve problems such as agglomeration and improve selectivity , Improve recycling, improve the effect of catalytic activity

Active Publication Date: 2018-01-05
NANJING INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Technical problem: In order to solve the problem that traditional noble metal catalysts are prone to agglomeration, the present invention provides a method for preparing a multi-walled carbon nanotube-based noble metal catalytic material

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] At 25°C, measure 0.2 g of multi-walled carbon nanotubes and 25 mL of deionized water, add multi-walled carbon nanotubes to deionized water, ultrasonically disperse for 0.5 h, add 0.4 g of urea, magnetically stir for 2 h, and then add 1.3 mL of platinum An aqueous potassium chloroplatinite solution with an ion concentration of 7.5 mg / mL was stirred for 2 h, centrifuged, washed with 100 mL of deionized water, and dried in vacuum at 60 °C for 3 h to obtain a multi-walled carbon nanotube-precious metal composite.

[0018] At 25 °C, measure 15 mL of nitrogen-nitrogen dimethylformamide, 15 mL of deionized water, and 15 mL of absolute ethanol to prepare a mixed solution, add 0.2 g of the multi-walled carbon nanotube-precious metal composite obtained in the previous step, and stir for 15 min. Add 0.096g of 2,5-dihydroxyterephthalic acid and 0.476g of cobalt nitrate hexahydrate in turn, stir and react for 10h, transfer to a hydrothermal reactor, react at 100°C for 24h, cool to ro...

Embodiment 2

[0020] At 25°C, measure 0.2 g of multi-walled carbon nanotubes and 25 mL of deionized water, add multi-walled carbon nanotubes to deionized water, ultrasonically disperse for 0.5 h, add 0.4 g of urea, stir magnetically for 2 h, and add 1.3 mL of gold ions The chloroauric acid solution with a concentration of 7.5 mg / mL was stirred and reacted for 2 hours, centrifuged, washed with 100 mL of deionized water, and dried in vacuum at 60 °C for 3 hours to obtain a multi-walled carbon nanotube-precious metal composite.

[0021] At 25°C, measure 15 mL of petroleum ether, 15 mL of deionized water, and 15 mL of absolute ethanol to prepare a mixed solution, add 0.2 g of the multi-walled carbon nanotube-precious metal composite obtained in the previous step, stir for 15 min, and add 0.079 g of p-benzene in turn Diformic acid and 0.284g of cobalt chloride hexahydrate were stirred and reacted for 10h, transferred to a hydrothermal reactor, reacted at 100°C for 24h, cooled to room temperature,...

Embodiment 3

[0023] At 25°C, measure 0.2 g of multi-walled carbon nanotubes and 25 mL of deionized water, add multi-walled carbon nanotubes to deionized water, ultrasonically disperse for 0.5 h, add 0.4 g of urea, stir magnetically for 2 h, and add 1.3 mL of silver ions The silver nitrate aqueous solution with a concentration of 7.5 mg / mL was stirred and reacted for 2 h, centrifuged, washed with 100 mL of deionized water, and dried in vacuum at 60 °C for 3 h to obtain the multi-walled carbon nanotube-precious metal composite.

[0024] At 25°C, measure 15 mL of chloroform, 15 mL of deionized water, and 15 mL of absolute ethanol, prepare a mixed solution, add 0.2 g of the multi-walled carbon nanotube-precious metal composite obtained in the previous step, stir for 15 min, and add 0.079 g of phthalate in turn Formic acid and 0.284g of cobalt chloride hexahydrate were stirred and reacted for 10h, transferred to a hydrothermal reactor, reacted at 100°C for 24h, cooled to room temperature, washed...

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Abstract

The invention relates to a multi-walled carbon nanotube-based noble metal catalyst and a preparation method thereof. The chemical composition of the material is CNT / Y / MOFs, wherein Y refers to noble metal nanoparticles and is one of gold, silver, platinum and palladium; MOFs is Co-MOF-74. The invention also provides a preparation method of the multi-walled carbon nanotube-based noble metal catalyst, wherein the obtained multi-walled carbon nanotube-based noble metal catalytic composite material has high thermal stability; meanwhile, a porous channel in a metal organic framework shell in the catalyst can promote sufficient contact between a reactant and the noble metal nanoparticles, thereby improving the catalytic efficiency of catalytic reaction. The nano composite material has an excellent application prospect in the chemical reaction such as automobile exhaust treatment, methane reforming reaction, pollutant degradation and photocatalytic splitting water into hydrogen.

Description

technical field [0001] The invention relates to a multi-wall carbon nanotube-based noble metal catalytic material, which belongs to the field of nano-catalytic composite materials. technical background [0002] In recent years, with the development of nanoscience and technology, the application of nanomaterials in the field of catalysis has received extensive attention. The high activity and high selectivity of nano-catalytic materials make them show excellent properties that are unmatched by many traditional catalytic materials. [0003] Patent CN201510925106.7 discloses a supported nano-precious metal catalyst, which includes a carrier and nano-precious metal particles supported on the carrier. The preparation method of the catalyst adopts a reduction method to prepare nano-precious metal colloidal particles, and then uses a colloidal deposition method to prepare the catalyst. The nano-precious metal particles are supported on different carriers to prepare a supported nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/16
Inventor 唐林张泽武立济伟马雨航彭昊
Owner NANJING INST OF TECH
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