Controllable preparation method of self-supporting two-dimensional mesoporous nano material

A nanomaterial, self-supporting technology, applied in nanocarbon, nanotechnology, nanotechnology and other directions, can solve the problems of small specific surface area, few active sites, and severe reaction conditions, and achieve good conductivity, sufficient exposure, and reaction. Simple system effect

Active Publication Date: 2021-09-07
HARBIN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of severe reaction conditions, small specific surface area and few active sites in the existing process of constructing two-dimensional mesoporous mesoporous materials, and provide a controllable method for self-supporting two-dimensional mesoporous nanomaterials. preparation method

Method used

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  • Controllable preparation method of self-supporting two-dimensional mesoporous nano material
  • Controllable preparation method of self-supporting two-dimensional mesoporous nano material
  • Controllable preparation method of self-supporting two-dimensional mesoporous nano material

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specific Embodiment approach 1

[0035] Embodiment 1: The controllable preparation method of self-supporting two-dimensional mesoporous nanomaterials in this embodiment is realized according to the following steps:

[0036] 1. Preparation of MOF nanoplates:

[0037] Dissolve 0.98 mg of surfactant in 5 mL of deionized water, then add 1.06 g of 2-methylimidazole, and sonicate until completely dissolved to obtain a mixed solution; dissolve 0.3 g of metal salt in 5 mL of deionized water, then Mixing reaction with the mixed solution, magnetic stirring for 15-30s and then standing for 2-6h, and centrifugal washing with deionized water to obtain MOF nanoplates;

[0038] 2. Preparation of F127-resol:

[0039]Take 0.6g of phenol and stir at 50℃ until melted, add 15mL of 0.1M sodium hydroxide solution dropwise, stir until the temperature is stable at 70℃, add 2.1ml of 37wt% formaldehyde solution dropwise and stir for 30min, then add 15mL 0.96g of F127 solution of 0.96g, keep the temperature stable at 66°C, add 50mL o...

specific Embodiment approach 2

[0044] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the surfactant described in Step 1 is cetyltrimethylammonium bromide (CTAB). Other steps and parameters are the same as in the first embodiment.

specific Embodiment approach 3

[0045] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that the metal salt in step 1 is zinc acetate, cobalt acetate, zinc nitrate hexahydrate or cobalt nitrate hexahydrate. Other steps and parameters are the same as in the first or second embodiment.

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Abstract

The invention discloses a controllable preparation method of a self-supporting two-dimensional mesoporous nano material, belongs to the field of material structure regulation and control, and aims to solve the problems of violent reaction conditions, small specific surface area of a product and few active sites in the existing process of constructing a two-dimensional sandwich structure mesoporous material. The method comprises the following steps: preparing a two-dimensional nanostructure material; preparing F127-sol; and preparing the two-dimensional F127-resol / MOF, graphene or gC3N4 composite structure material. Interlayer agglomeration of the two-dimensional material can be effectively prevented, the contactable specific surface area and catalytic active sites of ions are increased, diffusion of the ions in an interlayer space is promoted, and the method has the advantages of being good in conductivity, sufficient in active site exposure and the like. The synthesis conditions are simple and mild, strong corrosive or toxic materials such as hydrofluoric acid do not need to be introduced to take out the template to obtain mesopores, the reaction implementation difficulty is small, and the method is environment-friendly. The material obtained by the method is used as a carbon-based electrocatalyst.

Description

technical field [0001] The invention belongs to the field of material structure regulation, and particularly relates to a controllable preparation method of a self-supporting two-dimensional mesoporous nanomaterial. Background technique [0002] In recent years, nanostructures with two-dimensional (2D) morphologies, such as graphene-based nanosheets, metal organic frameworks (MOFs) nanosheets or nanoplates, 2D graphitic carbon nitride g-C 3 N 4 Such materials have received extensive attention due to their unique structural and electrical and optical properties. Among them, two-dimensional MOF materials have large surface area and rich framework composition, and their open structure provides more active sites, which accelerates the interaction processes such as internal ion adsorption, diffusion, separation and transport. Energy conversion and storage, catalysis, electrochemistry and other fields have significant application value. However, in practical applications, most ...

Claims

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Application Information

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IPC IPC(8): C01B32/15C01B32/184B01J21/18B01J27/24B01J31/06B82Y30/00B82Y40/00C01B21/082
CPCB01J21/18B01J27/24B01J31/06C01B32/15C01B21/082C01B21/0605B82Y30/00B82Y40/00C01P2004/03B01J35/23
Inventor尹永琦王梦琪陈妍李爽
OwnerHARBIN NORMAL UNIVERSITY