Efficient and general two-dimensional nanometer sheet-zero-dimensional nanocrystalline co-assembly method

A two-dimensional nano, zero-dimensional nano technology, applied in the direction of nanotechnology, chemical instruments and methods, oxides of ferrous iron, etc., can solve problems such as the limitation of nanoparticle types, and achieve wide applicability and broad application prospects of components , Wide applicability

Inactive Publication Date: 2019-06-14
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The nanosheets used in this method need to be positively charged, so they are limited to modified graphene, layered double hydroxide, and the types of nanoparticles are also limited.

Method used

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  • Efficient and general two-dimensional nanometer sheet-zero-dimensional nanocrystalline co-assembly method
  • Efficient and general two-dimensional nanometer sheet-zero-dimensional nanocrystalline co-assembly method
  • Efficient and general two-dimensional nanometer sheet-zero-dimensional nanocrystalline co-assembly method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) 12 nm Fe 3 o 4 Preparation of nanoparticles: 36 g of iron oleate and 8.6 g of oleic acid were dissolved in 200 g of octadecene, and reacted at 320 ° C for 30 min under the protection of nitrogen to obtain Fe with a particle size of about 13 nm. 3 o 4 Nanoparticles, add ethanol to precipitate the nanoparticles, after centrifugation, dissolve the obtained nanoparticles in n-hexane to form a concentration of 5 mg mL -1 stable colloidal solution.

[0036] (2) Fe 3 o 4 Phase transfer of nanoparticle colloidal solutions: taking Fe 3 o 410 mL of nanoparticle colloidal solution was placed in a centrifuge tube, and 10 mL of DMF was added thereto. Add HBF dropwise 4 , while adding and shaking until the nanoparticles are exchanged into the DMF phase. Add 15 mL of toluene, centrifuge, and dissolve the obtained nanoparticles in 1 mL of DMF to obtain a concentration of about 50 mg mL -1 stable colloidal solution.

[0037] (3) GO-Fe 3 o 4 Preparation of the composite:...

Embodiment 2

[0046] (1) 6nm NiFe 2 o 4 Preparation of nanoparticles: same as Example 1

[0047] (2) NiFe 2 o 4 Phase transfer of nanoparticle colloidal solution: same as Example 1.

[0048] (3) few layers of Ti 3 C 2 T x Preparation of Mxene: take 1 g Ti 3 AlC 2 Added to 20 mL of 1.6 g LiF in 9 M HCl solution at 35 o C under stirring for 24 h. After the reaction was completed, the solution was centrifuged and washed with deionized water until the upper layer solution turned black and green, and then the solution was sonicated for 30 min under nitrogen protection. Centrifuge at 1500 rpm for 30 min, and the upper layer solution is the few-layer Ti 3 C 2 T x colloidal solution.

[0049] (4) Ti 3 C 2 T x -NiFe 2 o 4 Preparation of the composite: Take NiFe in DMF phase 2 o 4 Nanoparticle colloidal solution (30 mgmL -1 ) 10 mL, to which was added Ti 3 C 2 T x Aqueous solution (3 mg mL -1 ) 10 mL, sonicate for 30s. Centrifuge, discard the supernatant, and precipitate a...

Embodiment 3

[0055] (1) Preparation of 18 nm MnO nanoparticles: 24 g manganese oleate and 8.6 g oleic acid were dissolved in 200 g octadecene, and reacted at 320 °C for 30 min under nitrogen protection to obtain MnO nanoparticles with a particle size of about 18 nm. Add ethanol to precipitate the nanoparticles, and after centrifugation, dissolve the obtained nanoparticles in n-hexane to form a concentration of 5 mg mL -1 stable colloidal solution.

[0056] (2) Phase transfer and hollowing of the MnO nanoparticle colloidal solution: 10 mL of the MnO nanoparticle colloidal solution was placed in a centrifuge tube, and 10 mL of DMF was added to it. Add NOBF slowly 4 , while adding and shaking until the nanoparticles are exchanged into the DMF phase. Add 15 mL of toluene, centrifuge, and dissolve the obtained nanoparticles in 1 mL of DMF to obtain a concentration of about 50 mg mL -1 stable colloidal solution.

[0057] (3) few layers of Ti 3 C 2 T x The preparation of Mxene: with embod...

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Abstract

The invention relates to an efficient and general two-dimensional nanometer sheet-zero-dimensional nanocrystalline co-assembly method. Long-chain organic ligand (such as oleic acid / oleylamine) coatednanometer particles are synthesized by a solution method; the materials are dispersed in a nonpolar solvent (such as n-hexane and toluene); then, fluoboric acid compounds (such as fluoboric acid, diazonium tetrafluoroborate and nitrosonium tetrafluoroborate) are used for exchanging the nanometer particles into polar solvents (such as N,N- dimethylformamide); at the moment, the zeta potential of the nanometer particles is positive; then, the potential of most nanometer sheets (such as oxidized graphene, transition metal disulfide compounds, layered metal oxides, C3N4, hexagonal boron nitride and transition metal carbide) is negative; through mixing, the nanometer sheets and the nanometer particles are induced to subjected to static assembly for obtaining two-dimensional-zero-dimensional nanometer crystals. The method has the advantages that the idea is novel; the application is wide; simplicity and low cost are realized; the functions and the application can be widely adjusted along with the ingredient change.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and in particular relates to a general efficient and simple co-assembly method of two-dimensional nanosheets and zero-dimensional nanocrystals. Background technique [0002] In the field of nanomaterials, two-dimensional materials have become an ivy due to their excellent physical and chemical properties. There are many types of two-dimensional materials, such as graphene, hexagonal boron nitride, layered transition metal oxides, transition metal dichalcogenides, layered transition metal carbides, etc., each with unique physical and chemical properties. However, despite the many advantages of 2D materials, there are still many problems, such as the problem of restacking in 2D materials, which will reduce their active sites and cause mass transfer problems. To solve this problem, it is common to use electrostatic interaction to introduce pillared ions to expand the layer spacing, or t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08C01G53/00C01G45/02C01B32/198C01B32/90B82Y40/00
Inventor 董安钢吴冠宏杨东韩文茜李明重邓雨薇邹金祥宁静杨于驰
Owner FUDAN UNIV
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