Preparation method of metal and alloy nanocrystalline

An alloy nanocrystal and metal technology, applied in the field of metal and alloy nanocrystal preparation, can solve problems such as restricting the large-scale production and practical application of nano-alloys, difficulty in separation and purification of nanomaterials, poor homogeneity in the same batch, etc. In industrial production, good catalytic performance and stability, high production efficiency
CN110578069AActive Publication Date: 2019-12-17QINGDAO UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QINGDAO UNIV
Publication Date
2019-12-17

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Abstract

The invention relates to a preparation method of metal and alloy nanocrystalline, and belongs to the field of inorganic nano materials. A metal precursor is taken as a raw material, and under the condition that no surfactant is added, alloy nanocrystalline with ultra-small (less than 3 nm) and uniform size is rapidly (less than 2 min) prepared at room temperature by means of shearing assistance, the metal and alloy nanocrystalline with different compositions and a controllable size can be obtained by controlling the volume of a reducing agent, a reactant molar ratio, a concentration, reactiontime and other parameters, and the prepared carbon-supported nanocrystalline is used as a hydrogen evolution electrocatalyst and has excellent performance. The method has the characteristics of high reaction speed, simple operation, recyclable solvent, low cost, easy industrial amplification production and the like.
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Description

technical field

[0001] The invention relates to a method for preparing metal and alloy nanocrystals, belonging to the technical field of nanomaterial preparation. Background technique

[0002] In recent years, the synthesis of metal and alloy nanocrystals has been a hot spot in nanomaterials research. This is because nanoalloys have tunable size, surface structure and composition, and the resulting synergistic effects, which make them have broad application prospects in catalysis, electronics, and biomedicine. However, the controllable preparation of nanoalloys, especially the regulation of size and composition, still faces great challenges. First of all, in the synthesis method, it is usually necessary to add surfactants or polymers to inhibit the growth and agglomeration of nanocrystals to achieve the purpose of regulating the size of nanocrystals. However, these viscous substances are very easy to adsorb on the surface of alloy nanocrystals, giving nanomaterials In addi...

Claims

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