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Preparation method of Ag nano particles

A nanoparticle and plasma technology, applied in nanotechnology and other directions, can solve the problems of complex preparation process of Ag nanoparticles, high production cost, environmental pollution, etc., and achieve the effects of low power consumption, convenient operation and low consumption.

Active Publication Date: 2020-06-02
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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  • Preparation method of Ag nano particles
  • Preparation method of Ag nano particles
  • Preparation method of Ag nano particles

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] use figure 1 The liquid cathode glow discharge plasma generating device shown. Adjust the three-dimensional mobile platform 15 so that the distance between the lower end of the platinum needle electrode 14 and the top of the capillary 8 is 1mm; inject the silver nitrate solution with pH=1 and molar volume concentration of 0.05mol / 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 flow rate of 1mL / min, overflow from the top of the capillary 8, and contact the lower end of the platinum needle electrode 14; turn on the DC stabilized current power supply 1 to control Yin and Yang The voltage between the poles is 480V and the current is 28mA; the DC stabilized voltage and current supply 1, the platinum needle electrode 14 and the graphite tube 12 form a closed loop; It flows downward, and flows into the liquid collector 9 through the discontinuous gap between the graphite ...

Embodiment 2

[0039] Pick figure 1 The liquid cathode glow discharge plasma generating device shown. Adjust the three-dimensional mobile 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 flow rate of 3.5mL / min, overflow from the top of the capillary 8, and contact the lower end of the platinum needle electrode 14; turn on the DC stabilized current power supply 1, control The voltage between the cathode and the anode is 550V, and the current is 32mA; the DC stabilized current power supply 1, the platinum needle electrode 14 and the graphite tube 12 form a closed loop; The outer wall flows downward, and flows into the liquid collector 9 through the discontinuous gap between ...

Embodiment 3

[0041] Pick figure 1 The liquid cathode glow discharge plasma device shown. Adjust the three-dimensional mobile 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 pool 3 enter the capillary 8 at a constant flow rate of 6mL / min, overflow from the top of the capillary 8, and contact the lower end of the platinum needle electrode 14; turn on the DC stabilized current power supply 1 to control Yin and Yang The voltage between the poles is 600V and the current is 58mA; the DC stabilized voltage and current supply 1, the platinum needle electrode 14 and the graphite tube 12 form a closed loop; It flows downward, and flows into the liquid collector 9 through the discontinuous gap between the graphite tube 12 ...

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Abstract

The invention provides a preparation method of Ag nano particles. The method is characterized in that a high-voltage direct-current power supply is used for providing electric energy, a platinum needle is taken as an anode, an AgNO3 solution is driven by a peristaltic pump to flow through a buffer bottle and overflows from the top end of a capillary tube where a graphite carbon rod penetrates, andthe overflowing solution is taken as a discharge cathode; when enough high voltage is applied between the two electrodes, the overflowing solution generates glow to form plasma, active particles generated by the solution cathode glow discharge plasma react with Ag+ in the solution, and generated Ag nano particle turbid liquid flows into a collector along the wall of the graphite carbon rod; and finally the turbid liquid is subjected to ultrasonic dispersion, centrifugal separation, washing by distilled water, drying to constant weight, and grinding to obtain the Ag nano particles. The Ag nanoparticles synthesized through the preparation method are uniform in structure, good in dispersity and low in agglomeration degree, and have a wide application prospect in the aspects of 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 method for preparing Ag nanoparticles, in particular to a method for producing AgNO by using liquid cathode glow discharge plasma technology. 3 Solution direct preparation of Ag nanoparticles. Background technique [0002] Silver (Ag) nanomaterials have been widely used in surface-enhanced Raman spectroscopy, light-emitting 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 its 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 the research of nanomaterials in recent years. [0003] The preparation methods of silver nanoparticles mainly include: reduction method, ultraso...

Claims

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Application Information

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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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