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Preparation method of self-supporting two-dimensional transition metal/metal oxide mixed-phase nanosheet

A transition metal and oxide technology, applied in the field of preparation of two-dimensional nanomaterials, can solve the problems of harsh reaction conditions, complex processes, poor conductivity of transition metal oxides, etc., and achieves good reproducibility, simple preparation process, and easy commercialization. the effect of

Inactive Publication Date: 2015-03-04
HEILONGJIANG UNIV
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of complex process, harsh reaction conditions and poor conductivity of transition metal oxides in the existing method for preparing self-supporting two-dimensional transition metal / metal oxide mixed-phase nanosheets, and to provide a self-supporting Preparation method of two-dimensional transition metal / metal oxide mixed phase nanosheets

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  • Preparation method of self-supporting two-dimensional transition metal/metal oxide mixed-phase nanosheet
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  • Preparation method of self-supporting two-dimensional transition metal/metal oxide mixed-phase nanosheet

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specific Embodiment approach 1

[0023] Embodiment 1: The preparation method of self-supporting two-dimensional transition metal / metal oxide mixed-phase nanosheets in this embodiment is implemented according to the following steps:

[0024] 1. Mix the transition metal inorganic salt and water to prepare an inorganic salt aqueous solution with a molar concentration of 0.025 to 0.1 mol / L, and add organic amine and alcohol in sequence at 25°C under stirring conditions to make the molar concentration of the transition metal inorganic salt and organic amine The ratio is 1:3~15, the volume ratio of water and alcohol is 1:1~3, continue to stir evenly to obtain the turbid liquid of organic amine complex containing metal ions;

[0025] 2. Transfer the turbid liquid of the organic amine complex containing metal ions obtained in step 1 to a high-pressure reactor, conduct a solvothermal reaction at 120-200°C for 6-24 hours, cool to 25°C, and then separate the reactants, After washing, it is dried in an oven to obtain the...

specific Embodiment approach 2

[0029] Embodiment 2: This embodiment differs from Embodiment 1 in that step 1 sequentially adds organic amine and alcohol under stirring conditions at 25° C., wherein the stirring speed is 100-1000 r / min. Other steps and parameters are the same as those in Embodiment 1.

specific Embodiment approach 3

[0030] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, the transition metal inorganic salt is mixed with water to prepare an aqueous inorganic salt solution with a molar concentration of 0.05-0.10 mol / L. Other steps and parameters are the same as those in Embodiment 1 or Embodiment 2.

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Abstract

A preparation method of a self-supporting two-dimensional transition metal / metal oxide mixed-phase nanosheet relates to a preparation method of a two-dimensional nano material and solves the problems of complex technology, harsh reaction condition and poor electric conductibility of transition metal oxide in the conventional method for preparing the self-supporting two-dimensional transition metal / metal oxide mixed-phase nanosheet. The preparation method of the mixed-phase nanosheet comprises the following steps: firstly, inorganic transition metal salt, organic amine, alcohol and water are mixed to form a turbid liquid of an organic amine complex containing metal ions; secondly, the turbid liquid reacts under a high-temperature solvent thermal condition to generate a precursor of the metal / metal oxide mixed-phase nanosheet; finally, high-heat treatment is conducted under the protection of inert gas to control the crystallinity of the two-dimensional metal / metal oxide mixed-phase nanosheet. The preparation method provided by the invention has the advantages of simple technology and lower equipment requirement; the mixed-phase nanosheet prepared by the method has excellent electric conductibility.

Description

technical field [0001] The invention relates to a preparation method of a two-dimensional nanometer material. Background technique [0002] Self-supporting two-dimensional nanomaterials have excellent physical and chemical properties and have a wide range of applications in many fields. For example, two-dimensional graphene has a large specific surface area and fast electron transport rate, and has been widely used in the preparation of electronic devices; two-dimensional metal sulfides composed of particles maintain the quantum properties of zero-dimensional nano-units, and have high energy / Electron storage specific capacity; the exfoliated 2D hydrotalcite exposes more active sites and exhibits excellent electrochemical and photocatalytic performance. At present, self-supporting two-dimensional nanomaterials are mostly prepared by exfoliation method, substrate-assisted physical (chemical) deposition method and substrate-assisted crystal growth method. However, the exfoli...

Claims

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Application Information

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IPC IPC(8): B22F9/24B82Y30/00
Inventor 任志宇孔令俊吴君杜世超付宏刚
Owner HEILONGJIANG UNIV
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