Nanometal particles and preparation method thereof

A technology of nano-metal particles and metal precursors, applied in metal processing equipment, nanotechnology, nanotechnology, etc., can solve the problems of uneven and insufficient reaction, metal particle size and particle size distribution, etc.

Inactive Publication Date: 2017-01-11
王东
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method still has the defects of inhomogeneous and insufficient reaction, so the particle size and particle size distribution of the metal particles prepared by it are not ideal, and there is still room for further improvement.

Method used

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  • Nanometal particles and preparation method thereof
  • Nanometal particles and preparation method thereof
  • Nanometal particles and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0104] Step A: Preparation of Silver Nitrate Solution

[0105] A saturated silver nitrate solution was prepared by dissolving 585 g of silver nitrate (purchased from Sigma Aldrich) in 100 g of deionized water at 80°C. Add extra silver nitrate to it to keep it saturated. Then, the saturated solution was flushed with nitrogen gas for 10 minutes, and additional water was added thereto to compensate for the water lost during flushing. Next, the solution was allowed to stand to ensure that undissolved silver nitrate crystals settled at the bottom of the solvent, and the solution was maintained at 80°C.

[0106] Step B: Prepare the stock solution

[0107] 23g of PVP (K30, available from Sigma Aldrich) was dissolved in 1kg of deionized water, 34g of tannic acid (available from Sigma Aldrich) was dissolved in 1kg of deionized water, 25.5g of ammonia water (28wt% concentration, purchased from from Sigma Aldrich) was dissolved in 1 kg of deionized water, and the above three solutions...

Embodiment 2

[0113] Step A: Preparation of silver nitrate solution A saturated silver nitrate solution was prepared by dissolving 222 g of silver nitrate (purchased from Sigma Aldrich) in 100 g of deionized water at 20°C. Add extra silver nitrate to it to keep it saturated. Then, the saturated solution was flushed with nitrogen gas for 10 minutes, and additional water was added thereto to compensate for the water lost during flushing. The solution was then allowed to stand to ensure that undissolved silver nitrate crystals settled at the bottom of the solvent, and the solution was maintained at 20°C.

[0114] Step B: Prepare the stock solution

[0115] 23g of PVP (K30, available from Sigma Aldrich) was dissolved in 1kg of deionized water, 34g of tannic acid (available from Sigma Aldrich) was dissolved in 1kg of deionized water, 25.5g of ammonia water (28wt% concentration, purchased from (from Sigma Aldrich) was dissolved in 1 kg of deionized water, the above solution was mixed into a 20 ...

Embodiment 3

[0121] Step A: Preparation of Silver Nitrate Solution

[0122] A saturated silver nitrate solution was prepared by dissolving 585 g of silver nitrate (purchased from Sigma Aldrich) in 100 g of deionized water at 80°C. Add extra silver nitrate to it to keep it saturated. Then, the saturated solution was flushed with nitrogen gas for 10 minutes, and additional water was added thereto to compensate for the water lost during flushing. Next, the solution was allowed to stand to ensure that undissolved silver nitrate crystals settled at the bottom of the solvent, and the solution was maintained at 80°C.

[0123] Step B: Prepare the stock solution

[0124] 23g of PVP (K30, available from Sigma Aldrich) was dissolved in 1kg of deionized water, 34g of tannic acid (available from Sigma Aldrich) was dissolved in 1kg of deionized water, 25.5g of ammonia water (28wt% concentration, purchased from Dissolved from Sigma Aldrich) in 1 kg of deionized water, the above three solutions were mi...

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Abstract

The invention relates to nanometal particles and a preparation method thereof. Specifically, the nanometal particles are prepared with the method comprising the following steps: a) providing a solution of a metal precursor; b) providing mother liquor containing a reducing agent; c) atomizing the solution of the metal precursor and enabling the atomized solution of the metal precursor to make contact with the mother liquor; and d) allowing the metal precursor to react with the reducing agent so as to form the nanometal particles, wherein the solubility of the metal precursor in a first solvent is higher than that of the metal precursor in the mother liquor. The preparation method of the nanometal particles has the advantages that equipment is simple, raw materials are easily available, cost is low, conditions are easy to control, yield is high, output is large and the like which are realized with a traditional liquid-phase chemical reduction method, and further, the obtained nanometal particles have very ideal particle size and particle size distribution.

Description

technical field [0001] The invention relates to a nano metal particle, in particular to a nano metal particle with a narrow particle size distribution. The invention also relates to the preparation method of the nano metal particles. Background technique [0002] Currently, research on nanomaterials is very active. As an important type of nanomaterials, nano-metal particles show thermal, optical, electrical, magnetic, catalytic and other properties different from those of large-scale materials due to their small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect. , so it has a wide range of applications in the fields of superconductivity, microelectronics, biology, and catalysis. Generally, nano metal particles refer to metal particles with a particle size (ie diameter or equivalent diameter) between 1 and 1000 nm. In addition to particle size, the width of particle size distribution is also an important parameter to characterize nan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24B22F1/00B82Y30/00B82Y40/00B22F1/054
CPCB82Y30/00B82Y40/00B22F2999/00B22F9/24B22F9/026B22F1/054
Inventor 王东
Owner 王东
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