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A kind of preparation method of ag nanoparticles

A nanoparticle and plasma technology, applied in the direction of nanotechnology, can solve the problems of environmental pollution, high production cost, and complicated preparation process of Ag nanoparticles, and achieve the effects of low dosage, convenient operation, and low power consumption

Active Publication Date: 2022-07-12
NORTHWEST NORMAL UNIVERSITY
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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 simple, quick and green method for synthesizing Ag nanoparticles by using liquid cathode glow discharge plasma Preparation of Ag nanoparticles directly from silver nitrate solution at pH=1 by bulk method

Method used

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  • A kind of preparation method of ag nanoparticles
  • A kind of preparation method of ag nanoparticles
  • A kind of preparation method of ag nanoparticles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] use figure 1 The liquid cathode glow discharge plasma generator shown. Adjust the three-dimensional moving platform 15 so that the distance between the lower end of the platinum needle electrode 14 and the top of the capillary 8 is 1 mm; inject the silver nitrate solution with pH=1 and molar volume concentration of 0.05 mol / L into the solution pool 3, and start the peristaltic pump 4. Make the silver nitrate solution in the solution tank 3 enter the capillary 8 at a constant speed at a flow rate of 1 mL / min, overflow from the top of the capillary 8, and contact the lower end of the platinum needle electrode 14; turn on the DC voltage-stabilized power supply 1 to control the yin and yang The voltage between the electrodes is 480V and the current is 28mA; the DC voltage-stabilized power supply 1, the platinum needle electrode 14 and the graphite tube 12 form a closed loop; during the electrification process, the solution overflowing from the top of the capillary 8 is elec...

Embodiment 2

[0039] Pick figure 1 The liquid cathode glow discharge plasma generator shown. Adjust the three-dimensional moving platform 15 so that the distance between the lower end of the platinum needle electrode 14 and the top of the capillary 8 is 2 mm; inject the silver nitrate solution with pH=1 and molar volume concentration of 0.10 mol / L into the solution pool 3, and start the peristaltic pump 4. Make the silver nitrate solution in the solution pool 3 enter the capillary 8 at a constant speed with a flow rate of 3.5 mL / min, overflow from the top of the capillary 8, and contact the lower end of the platinum needle electrode 14; turn on the DC voltage-stabilized and constant-current power supply 1, and control the The voltage between the cathode and anode is 550V, and the current is 32mA; the DC voltage-stabilized power supply 1, the platinum needle electrode 14 and the graphite tube 12 form a closed loop; during the electrification process, the solution overflowing from the top of ...

Embodiment 3

[0041] Pick figure 1 The liquid cathode glow discharge plasma device shown. Adjust the three-dimensional moving platform 15 so that the distance between the lower end of the platinum needle electrode 14 and the top of the capillary 8 is 3 mm; inject the silver nitrate solution with pH=1 and molar volume concentration of 0.15 mol / L into the solution pool 3, and start the peristaltic pump 4. Make the silver nitrate solution in the solution tank 3 enter the capillary 8 at a constant speed with a flow rate of 6 mL / min, overflow from the top of the capillary 8, and contact the lower end of the platinum needle electrode 14; turn on the DC voltage-stabilized power supply 1 to control the yin and yang The voltage between the electrodes is 600V and the current is 58mA; the DC voltage-stabilized power supply 1, the platinum needle electrode 14 and the graphite tube 12 form a closed loop; during the electrification process, the solution overflowing from the top of the capillary 8 is elec...

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Abstract

The invention provides a preparation method of Ag nano-particles. Electric energy is provided by a high-voltage direct current power supply, a platinum needle is an anode, and AgNO is used as an anode. 3 The solution flows through the buffer bottle driven by the peristaltic pump, overflows from the top of the capillary penetrating the graphite carbon rod, and uses the overflowing solution as the discharge cathode. When a high enough voltage is applied between the two electrodes, the overflowing liquid produces a glow to form a plasma, and the active particles generated by the liquid cathode glow discharge plasma and the Ag in the solution + The reaction occurs, and the generated Ag nanoparticle turbid liquid flows into the collector along the wall of the graphitic carbon rod. Finally, the turbid liquid is ultrasonically dispersed, centrifuged, washed with distilled water, dried to constant weight, and ground to obtain Ag nanoparticles. The Ag nanoparticles synthesized by the preparation method have uniform structure, good dispersibility and low degree of agglomeration, and have broad application prospects in catalysis, sensors, electrode materials and the like.

Description

technical field [0001] The invention belongs to the technical field of nanomaterial preparation, and relates to a preparation method of Ag nanoparticles, in particular to a method for preparing AgNO particles by utilizing liquid cathode glow discharge plasma technology. 3 A method for directly preparing Ag nanoparticles from solution. Background technique [0002] Silver (Ag) nanomaterials have been widely used in surface-enhanced Raman spectroscopy, luminescence and display devices, high-efficiency catalysts, biosensors, and high-performance electrode materials due to their excellent catalytic, optical, and electrical properties. The morphology, distribution and size of silver nanoparticles will affect their performance, so the preparation of various silver nanoparticles with different shapes plays a key role in its application, and this is also a hot spot in nanomaterials research in recent years. [0003] The preparation methods of silver nanoparticles mainly include: re...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/14B82Y40/00
CPCB22F9/14B82Y40/00
Inventor 俞洁康月静陆泉芳卢转红崔利娟
Owner NORTHWEST NORMAL UNIVERSITY
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