Graphene loaded MOF derivative aerogel and preparation method thereof

A graphene and aerogel technology, applied in the field of graphene-supported MOF derivative aerogel and its preparation, can solve the problems of low MOF content, complex precursor components, uneven distribution, etc., and achieve excellent electromagnetic shielding performance , controllable component structure, low density effect

Active Publication Date: 2020-10-27
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the following problems still exist in the controllable synthesis and large-scale preparation of graphene / bimetallic MOF composites: (1) Due to the complex composition of precursors for bimetallic MOF synthesis, excessive metal salts and organic ligands lead to graphite oxide The content of MOF in the composite system is low and the distribution is uneven; (2) Since most MOFs cannot be synthesized in aqueous solvents, graphene oxide needs to be pretreated in corresponding solvents, which greatly limits Types of graphene / MOF composite systems; (3) Graphene / MOF composites usually exist in the form of agglomerated graphene powder, which limits the application prospects of the composite system in many fields, and there are problems such as storage and recycling difficulties
Therefore, there are still challenges in the preparation of graphene / MOF and its derivative composites

Method used

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  • Graphene loaded MOF derivative aerogel and preparation method thereof
  • Graphene loaded MOF derivative aerogel and preparation method thereof
  • Graphene loaded MOF derivative aerogel and preparation method thereof

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Experimental program
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Embodiment 1

[0025] The graphene-supported MOF derivative aerogel of the present embodiment comprises the following raw material components: graphene oxide, FeCl 3 ·6H 2 O, Ni(NO 3 ) 2 ·6H 2 O, phthalic acid, sodium hydroxide and dimethylformamide, where FeCl 3 ·6H 2 O, Ni(NO 3 ) 2 ·6H 2 The molar ratio of O and phthalic acid is 2:1:3.

[0026] 1) Preparation of bimetallic MOF: Weigh 0.66mol FeCl 3 ·6H 2 O, 0.33mol Ni(NO 3 ) 2 ·6H 2 O and 0.99mol BDC powder were placed in a 25ml polytetrafluoroethylene reactor, 10ml DMF was added, fully stirred until the solution was clear, then 2ml aqueous sodium hydroxide solution (0.4mol / L) was added dropwise, and fully stirred for 15min; then The prepared solution was transferred into a reactor for solvothermal reaction, the reaction temperature was 100°C, and the reaction time was 48 hours; the reaction product Fe-Ni bimetallic MOF was washed repeatedly with DMF and deionized water before use;

[0027] 2) Preparation of graphene oxide aq...

Embodiment 2

[0030] The graphene-supported MOF derivative aerogel of the present embodiment comprises the following raw material components: graphene oxide, FeCl 3 ·6H 2 O, Ni(NO 3 ) 2 ·6H 2 O, phthalic acid, sodium hydroxide and dimethylformamide, where FeCl 3 ·6H 2 O, Ni(NO 3 ) 2 ·6H 2 The molar ratio of O and phthalic acid is 1:1:3.

[0031] 1) Preparation of bimetallic MOF: Weigh 0.33mol FeCl 3 ·6H 2 O, 0.33mol Ni(NO 3 ) 2 ·6H 2O and 0.99mol BDC powder were placed in a 25ml polytetrafluoroethylene reactor, 15ml DMF was added, and the solution was fully stirred until the solution was clear, then 2ml aqueous sodium hydroxide solution (0.2mol / L) was added dropwise, and fully stirred for 10min; then The prepared solution was transferred into a reactor for solvothermal reaction, the reaction temperature was 120°C, and the reaction time was 3 hours; the reaction product Fe-Ni bimetallic MOF was washed repeatedly with DMF and deionized water before use;

[0032] 2) Preparation o...

Embodiment 3

[0035] The graphene-supported MOF derivative aerogel of the present embodiment comprises the following raw material components: graphene oxide, FeCl 3 ·6H 2 O, Ni(NO 3 ) 2 ·6H 2 O, phthalic acid, sodium hydroxide and dimethylformamide, where FeCl 3 ·6H 2 O, Ni(NO 3 ) 2 ·6H 2 The molar ratio of O and phthalic acid is 2:2:1.

[0036] 1) Preparation of bimetallic MOF: Weigh 0.66mol FeCl 3 ·6H 2 O, 0.66mol Ni(NO 3 ) 2 ·6H 2 O and 0.33mol BDC powder were placed in a 25ml polytetrafluoroethylene reactor, 15ml DMF was added, fully stirred until the solution was clear, then 1ml aqueous sodium hydroxide solution (0.5mol / L) was added dropwise, and fully stirred for 30min; then The prepared solution was transferred into a reaction kettle for solvothermal reaction, the reaction temperature was 80°C, and the reaction time was 48 hours; the reaction product Fe-Ni bimetallic MOF was washed repeatedly with DMF and deionized water before use;

[0037] 2) Preparation of graphene o...

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Abstract

The invention discloses graphene loaded MOF derivative aerogel and a preparation method thereof. The aerogel is prepared from the following raw material components: graphene oxide, FeCl3. 6H2O, Ni (NO3) 2.6 H2O and phthalic acid, wherein the molar ratio of FeCl3. 6H2O to Ni (NO3) 2.6 H2O to phthalic acid is (1-3): (1-3): (1-3), and the mass ratio of Fe-Ni bimetallic MOF synthesized from FeCl3. 6H2O, Ni (NO3) 2.6 H2O and phthalic acid to graphene oxide is (1: 10)-(10: 1). The invention also provides the preparation method of the aerogel. The preparation method is mild and rapid, controllable incomponents and macroscopic in scale; the key technical problems that components and structures in a graphene/bimetal MOF and derivative composite system thereof are uncontrollable and the like are solved, and the prepared graphene loaded MOF derivative aerogel has wide application prospects in the fields of electro-catalytic energy storage, electromagnetic shielding, adsorption, sensing and the like.

Description

technical field [0001] The invention relates to a graphene-loaded MOF aerogel and a preparation method thereof, in particular to a graphene-loaded MOF derivative aerogel and a preparation method thereof. Background technique [0002] Metal-organic framework (MOF), a kind of inorganic-organic porous crystal, has the characteristics of high specific surface area, tunable structure, and porosity, and has been widely used in many fields such as gas storage and separation, sensing, catalysis, and electrochemical energy storage. extensive attention. Benefiting from the unique structural and compositional characteristics of MOFs, MOFs are also precursors or templates for the preparation of various nanostructured materials, including metal oxides, metal phosphides, metal-carbon, metal compound-carbon, etc. In order to improve the composition, structure and performance of single metals, and to take advantage of the synergistic effect of bimetals, bimetallic MOFs have attracted more ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/184B22F9/20B82Y40/00B82Y30/00H05K9/00
CPCC01B32/184B22F9/20B82Y40/00B82Y30/00H05K9/0081
Inventor 邵高峰黄啸谷权斌姚义俊刘斌
Owner NANJING UNIV OF INFORMATION SCI & TECH
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