Preparation method of highly-ordered nano particle superlattice material

A nanoparticle and superlattice technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as weak interaction, limited application, and influence on electron transport capacity, and achieve improved Mutual coupling effect, enhanced coupling effect, and easy preparation method

Active Publication Date: 2014-11-26
FUDAN UNIV
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  • Claims
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Problems solved by technology

But in fact, the surface of colloidal nanoparticles is usually covered by a layer of long-chain, insulating surfactant ligand molecules (such as oleic acid, oleylamine, etc.), so in the nanoparticle superlattice, between adjacent nanoparticles The interaction of the superlattice is very weak, which greatly limits the manifestation of the collective effect of the superlattice, and seriously affects the electron transport capacity, which limits its application in the fields of catalysis, electronic and optoelectronic devices, and energy storage.

Method used

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  • Preparation method of highly-ordered nano particle superlattice material
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Examples

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Embodiment 1

[0032] (1) Fe 3 o 4 Preparation of nanoparticles: 36 g iron oleate and 5.7 g oleic acid were dissolved in 200 g octadecene, and reacted at 320 °C for 30 min under nitrogen protection to obtain Fe with a particle size of 11 nm 3 o 4 For nanoparticles, ethanol was added to precipitate the nanoparticles, and after centrifugation, the resulting nanoparticles were dissolved in n-hexane to form a concentration of ~10 mg mL -1 stable colloidal solution.

[0033] (2) Oleic acid coated Fe 3 o 4 Preparation of nanoparticle superlattice: the obtained Fe 3 o 4 The nanoparticle colloidal solution was placed in a porcelain boat, and the n-hexane was naturally volatilized at room temperature to obtain highly ordered oleic acid-coated Fe 3 o 4 Nanoparticle superlattice.

[0034] (3) Carbon coated Fe 3 o 4 Fabrication of Nanoparticle Superlattices: Coating Fe with Oleic Acid 3 o 4The nanoparticle superlattice material is transferred to a tube furnace and calcined at 500°C for 2 ho...

Embodiment 2

[0037] (1) Fe 3 o 4 Preparation of nanoparticles: 36 g iron oleate and 8.55 g oleic acid were dissolved in 200 g octadecene, and reacted at 320 °C for 30 min under nitrogen protection to obtain Fe with a particle size of about 14 nm. 3 o 4 Nanoparticles.

[0038] (2) Oleic acid coated Fe 3 o 4 Preparation of nanoparticle superlattice: Same as Example 1.

[0039] (3) Preparation of highly ordered mesoporous carbon material: same as Example 1.

[0040] (4) Preparation of highly ordered carbon nanoparticle superlattice material: Immerse 0.1 g of the obtained mesoporous carbon material in sucrose aqueous solution (1 M), add 0.1 g of concentrated sulfuric acid, stir for 6 h, and centrifuge the mesoporous carbon Separated and dried in a vacuum oven at 80 °C for 1 h, the process of impregnation, centrifugation, and drying was repeated twice, and reacted at 500 °C for 30 min under nitrogen protection to promote the carbonization of sucrose and obtain carbon nanoparticle superlat...

Embodiment 3

[0042] (1) Fe 3 o 4 Preparation of nanoparticles: 36 g iron oleate and 5.7 g oleic acid were dissolved in 200 g hexadecene, and reacted at 280 °C for 30 min under nitrogen protection to obtain Fe with a particle size of about 10 nm. 3 o 4 Nanoparticles.

[0043] (2) Oleic acid coated Fe 3 o 4 Preparation of nanoparticle superlattice: Same as Example 1.

[0044] (3) Preparation of highly ordered mesoporous carbon material: same as Example 1.

[0045] (4) Preparation of highly ordered silica nanoparticle material: immerse 0.1 g of mesoporous carbon material in ethanol solution (1 M) of ethyl orthosilicate, stir for 6 h, and separate mesoporous carbon by centrifugation Come out, drop two drops of ammonia solution to hydrolyze the tetraethyl orthosilicate, repeat the process of dipping, centrifuging, and hydrolysis twice to obtain a silica nanoparticle superlattice material.

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Abstract

The invention belongs to the technical field of inorganic material, and specifically relates to a preparation method of a highly-ordered nano particle superlattice material. The preparation method comprises the following steps: adopting a solution method to prepare mono-dispersed metal oxide nano crystals, inducing the nano particles to carry out self-assembly through the solution evaporation to prepare a three-dimensional ordered nano crystal superlattice solid, subjecting the solid to high-temperature carbonization so as to carbonize the organic molecules on the particle surfaces to obtain carbon-coated oxide nano particle superlattice, removing the oxide nano particles through acid etching so as to obtain a highly-ordered mesoporous carbon material, taking the mesoporous carbon material as the template, pouring a proper precursor into the channels in the carbon material, and finally subjecting the carbon material to steps of hydrolysis and crystallization so as to obtain the superlattice material of corresponding nano particle. The preparation has the advantages of simpleness, easily available raw material, and low cost. The size and morphology of nano particles can be modulated by adjusting the particle size and morphology of the initial metal oxide nano particles.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and in particular relates to a method for preparing a highly ordered nanoparticle superlattice material. Background technique [0002] Monodisperse nanoparticles are ideal building blocks for building macroscopic functional materials and devices, and highly ordered superlattice materials, which are self-assembled from nanoparticles, are a new class of granular materials that have emerged in recent years. Devices, catalysis, energy storage, information storage and other fields have shown important application value. At present, the preparation method of nanoparticle superlattice materials mainly relies on the self-assembly of nanoparticles induced by solvent volatilization; this method requires that the nanoparticles must first be prepared in the form of monodisperse colloids, and then the slow volatilization of the solvent induces the self-assembly of nanoparticles to form a superstru...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G23/047C01G19/02C01B31/02C01B33/12B82Y30/00
Inventor 董安钢杨东焦玉聪丁艺胡建华
Owner FUDAN UNIV
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