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Preparation method of hollow cactus-shaped carbon plate-carbon nanotubes

A technology of carbon nanotubes and cactus, which is applied in the field of preparation of electrocatalytic carbon materials, can solve the problems of high toxicity of reagents, failure to greatly improve the performance of ZIF-derived carbons, and cumbersome and complicated synthesis processes, and achieve strong variability and easy The effect of control modification and broad application prospects

Pending Publication Date: 2020-01-10
NANJING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Kang et al. prepared porous ZIF-8-derived carbon catalysts by increasing the residence time of Zn in ZIF-8 during pyrolysis (J.S.Kang, et al, J.Mater.Chem.A, 2018, 6, 20170), but Failed to greatly improve the performance of ZIF-derived carbons
Chen et al proposed the preparation of N, P, S co-doped hollow polyhedral carbon by MOF@polymer method (Y. Chen, et al, Nat. Commun., 2018, 9, 5422), but the synthesis process is cumbersome and complicated, The reagents used are highly toxic

Method used

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  • Preparation method of hollow cactus-shaped carbon plate-carbon nanotubes
  • Preparation method of hollow cactus-shaped carbon plate-carbon nanotubes
  • Preparation method of hollow cactus-shaped carbon plate-carbon nanotubes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] (1) Dissolve 5.0 g of 2-methylimidazole in 100 mL of deionized water, and stir for 10 min.

[0025] (2) 1.32g of Zn(NO 3 ) 2 ·6H 2 O and 0.33g of Co(NO 3 ) 2 ·6H 2 O was dissolved in 100 mL deionized water, added to the solution in step 1, and stirred at room temperature for 3 h.

[0026] (3) Dissolve 0.5 g of dopamine hydrochloride in 20 mL of deionized water, add the solution in step 2, and continue stirring at room temperature for 8 h.

[0027] (4) The black precipitate was collected by centrifugation at 2000r / min, centrifuged for 5min, and washed repeatedly with deionized water and ethanol for 3 times respectively. After drying, the composite ZIFs@PDA was obtained.

[0028] (5) Carry out high-temperature carbonization in a nitrogen atmosphere at 900 °C, and perform acid treatment to finally obtain 0.5-CS / CNTs-9.

Embodiment 2

[0035] (1) Dissolve 5.0 g of 2-methylimidazole in 100 mL of deionized water, and stir for 10 min.

[0036] (2) 1.32g of Zn(NO 3 ) 2 ·6H 2 O and 0.33g of Co(NO 3 ) 2 ·6H 2 O was dissolved in 100 mL deionized water, added to the solution in step 1, and stirred at room temperature for 3 h.

[0037] (3) Dissolve 0.25 g of dopamine hydrochloride in 20 mL of deionized water, add the solution in step 2, and continue stirring at room temperature for 8 h.

[0038] (4) The black precipitate was collected by centrifugation at 2000r / min, centrifuged for 5min, and washed repeatedly with deionized water and ethanol for 3 times respectively. After drying, the composite ZIFs@PDA was obtained.

[0039] (5) Carry out high-temperature carbonization in a nitrogen atmosphere at 900 °C, and perform acid treatment to finally obtain 0.25-CS / CNTs-9.

Embodiment 3

[0041] (1) Dissolve 5.0 g of 2-methylimidazole in 100 mL of deionized water, and stir for 10 min.

[0042] (2) 1.32g of Zn(NO 3 ) 2 ·6H 2 O and 0.33g of Co(NO 3 )2 ·6H 2 O was dissolved in 100 mL deionized water, added to the solution in step 1, and stirred at room temperature for 3 h.

[0043] (3) Dissolve 0.75 g of dopamine hydrochloride in 20 mL of deionized water, add the solution in step 2, and continue stirring at room temperature for 8 h.

[0044] (4) The black precipitate was collected by centrifugation at 2000r / min, centrifuged for 5min, and washed repeatedly with deionized water and ethanol for 3 times respectively. After drying, the composite ZIFs@PDA was obtained.

[0045] (5) Carry out high-temperature carbonization in a nitrogen atmosphere at 900 °C, and perform acid treatment, and finally obtain 0.75-CS / CNTs-9.

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Abstract

The invention discloses a preparation method of hollow cactus-shaped carbon plate-carbon nanotubes. The method adopts a polydopamine-assisted interface induction strategy to convert ZIFs into hollow cactus-shaped carbon plate-carbon nanotubes, and the hollow cactus-shaped carbon sheet-carbon nanotubes can be applied to an electrocatalysis process. By coordinating the coordination between the precursors Zn and Co<2+> and introducing a PDA polymer, ZIFs@PDA can be obtained, and by means of the interface induction and confinement effect of PDA in the pyrolysis process, reasonable optimization ofthe components and structures can be realized simultaneously, and finally, acid treatment is carried out to remove part of metal particles in the Co-ZIFs@PDA pyrolysis derived carbon, thus obtaining the nitrogen-doped hollow cactus-shaped CS-CNTs. The CS-CNTs prepared by the preparation method disclosed by the invention have excellent ORR activity and durability in an alkaline solution.

Description

technical field [0001] The invention relates to a method for preparing a hollow cactus-shaped carbon sheet-carbon nanotube, in particular to a method for preparing a hollow cactus-shaped carbon sheet-carbon nanotube derived from polydopamine-assisted induction of MOFs for electrocatalytic oxygen reduction reaction, The invention belongs to the technical field of preparation of electrocatalytic carbon materials. Background technique [0002] Due to their excellent thermal and chemical stability, easy functionalization, and structural diversity, nanostructured carbon materials have been applied in many fields as adsorption, catalysis, and energy storage / conversion materials. Currently, carbon material types include 1D carbon nanotubes (CNTs), 2D graphene / carbon nanosheets (GR / CN), and 3D hierarchical porous carbons (HPCs). Compared with 1D and 3D nanostructures, 2D nanomaterials, especially those doped with heteroatoms (N, O, S, and P), have many advantages for energy storage...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/05C01B32/16C01B32/15B01J21/18
CPCC01B32/05C01B32/16C01B32/15B01J21/185B01J35/33
Inventor 李健生陈赛赛张明肖承铭王宏宇晏鑫王超海王连军孙秀云沈锦优韩卫清
Owner NANJING UNIV OF SCI & TECH
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