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Nanometer silver sol and preparing method thereof

A nano-silver sol and a technology of silver sol, which are applied in the field of nano-silver hydrosol and its preparation, can solve problems such as difficulty in preparation, and achieve the effects of simple equipment, high stability, and simple process

Inactive Publication Date: 2005-02-23
深圳市宜丽环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a nano-silver sol with stable shape, uniform dispersion and high silver content and a preparation method thereof, so as to overcome the disadvantage that the high-content nano-silver sol is not easy to obtain in the prior art, and the manufacturing method is simple and convenient. Large-scale use in industry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take 0.01 mole of silver nitrate, the molar ratio of silver nitrate and reducing agent is 1:10, take reducing agent, such as sodium borohydride 0.1 mole, get dispersed protective colloid, such as polyvinyl alcohol and its derivatives 1000 kg, distilled water 10000 liters , at this moment, the weight of dispersed protective colloid is 10% of distilled water weight, according to the following process steps:

[0034] Dissolve silver nitrate, reducing agent and dispersed protective colloid in distilled water respectively, and prepare concentrations of 1×10 -6 mol / L, 1×10 -5 mol / L, 100g / L silver nitrate aqueous solution, reducing agent aqueous solution and dispersed protective colloid aqueous solution;

[0035] Put the dispersed protective colloid aqueous solution and the reducing agent aqueous solution into the reaction kettle, and stir evenly;

[0036] Put the silver nitrate aqueous solution into the flow controller, control its flow to the reactor, add dropwise to the a...

Embodiment 2

[0040] Get 0.25 mole of silver nitrate, the molar ratio of silver nitrate and reducing agent is 1:5, get reducing agent, such as sodium borohydride 1.25 mole, get dispersed protective colloid, such as polyvinyl alcohol and its derivatives 2.5 kg, distilled water 25 liters , at this moment, the weight of dispersed protective colloid is 10% of distilled water weight, according to the following process steps:

[0041] Dissolve silver nitrate, reducing agent and dispersed protective colloid in distilled water respectively, and prepare concentrations of 1×10 -2 mol / L, 5×10 -2 mol / L, 100g / L silver nitrate aqueous solution, reducing agent aqueous solution and dispersed protective colloid aqueous solution;

[0042] Put the dispersed protective colloid aqueous solution and the silver nitrate aqueous solution into the reaction kettle, and stir evenly;

[0043] Put the reducing agent aqueous solution into the flow controller, control its flow to the reaction kettle, add it dropwise to ...

Embodiment 3

[0047] Take 1 mole of silver nitrate, the molar ratio of silver nitrate and reducing agent is 1:1, take reducing agent, such as 1 mole of sodium phosphite, take dispersing protective colloid, such as 50 kg of polyvinylpyrrolidone and its derivatives, and 1000 liters of distilled water , at this moment, the weight of dispersed protective colloid is 5% of distilled water weight, according to the following process steps:

[0048] Dissolve silver nitrate, reducing agent and dispersed protective colloid in distilled water respectively, and prepare concentrations of 1×10 -3 mol / L, 1×10 -3 mol / L, 50g / L silver nitrate aqueous solution, reducing agent aqueous solution and dispersed protective colloid aqueous solution;

[0049] Put the dispersed protective colloid aqueous solution and the reducing agent aqueous solution into the reaction kettle, and stir evenly;

[0050] Put the silver nitrate aqueous solution into the flow controller, control its flow to the reaction kettle, add it dro...

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Abstract

A nano-Ag sol is prepared through dispersing the protecting colloid solution in silver nitrate solution, adding reducer solution, and redox reacting.

Description

technical field [0001] The invention relates to a nano silver hydrosol and a preparation method thereof, in particular to a nano silver hydrosol added with a dispersed protective colloid and a preparation method thereof. Background technique [0002] Nano-silver has been discovered by scientists as early as the 1970s. The excellent properties of nano-silver and the assembly system containing nano-silver particles in many aspects such as mechanics, electricity, heat, optics, and catalysis have aroused great interest. Exploring these Work on the physical mechanism of the superior properties is ongoing. Nano-silver occupies an extremely important position in the research fields of surface-enhanced Raman spectroscopy, surface-enhanced resonance scattering spectroscopy, molecular biology, and supramolecular systems; at the same time, nano-silver also shows a very broad application prospect: such as using nano-silver as a dilution The heat exchanger efficiency of refrigerant is 3...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 陈丽琼刘杰
Owner 深圳市宜丽环保科技有限公司
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