Method for purifying colloid nanoparticles by using electrophoretic deposition

An electrophoretic deposition and nanoparticle technology, applied in the field of nanomaterials, can solve problems such as hindering the development and application process of nanoparticle technology, and achieve the effect of green purification speed, fast purification speed, easy separation and collection

Inactive Publication Date: 2012-04-11
WUXI ZHONGKE GUANGYUAN BIOMATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These problems have seriously hindered the development and application of nanoparticle technology.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] (1) Place the FTO-coated glass electrodes in a 50mL glass with a distance of 2.5cm, and apply a DC voltage of 500V to both ends;

[0028] (2) Purified particles by electrophoretic deposition: directly add n-hexane 39.0% v / v, octadecene 60.3% v / v, tributylphosphine 0.7% v / v, 8.5mM oleic acid and tributylphosphine Pour 10 mL of cadmium selenide nanoparticles as a ligand and all unreacted precursors into a glass, add 15 mL of acetone, and after 5 minutes, the nanoparticles are deposited on the anode, and the solution becomes clear. After another 15 minutes, the voltage was cut off, and the electrode plate was removed from the solution.

[0029] (3) Particle collection and redispersion: the collected nanoparticles were rinsed with 5 mL of acetone and then dispersed in n-hexane.

[0030] Using this method for purification, the purification rate of cadmium selenide nanoparticles is 95%.

Embodiment 2

[0032] (1) Place the ITO-coated glass electrode in a 50mL glass with a distance of 0.5cm, and apply a DC voltage of 200V to both ends;

[0033] (2) Electrophoretic deposition of purified particles: Pour 10 mL of lead selenide colloidal particles with oleic acid and biphenylphosphine as ligands in the later stage of the reaction, and all unreacted precursors into a glass, and add 50 mL of ring Hexanone, after 2min the nanoparticles were deposited on the anode and the solution became clear. After another 8 minutes, the voltage was cut off, and the electrode plate was removed from the solution.

[0034] (3) Particle collection and redispersion: the collected nanoparticles were washed with 5 mL of cyclohexanone and then dispersed in toluene.

[0035] Using this method for purification, the lead selenide purification rate is 93%.

Embodiment 3

[0037] (1) Place the FTO-coated glass electrode in a 50mL glass with a distance of 10cm, and apply a DC voltage of 1200V to both ends;

[0038] (2) Electrophoretic deposition of purified particles: directly pour 50 mL of cadmium telluride colloidal particles with tetradecanoic acid and trioctylphosphine as ligands in the later stage of the reaction, and all unreacted precursor solutions into a glass cup, and add 10 mL Dichloromethane, after 10 min the nanoparticles were deposited on the anode and the solution became clear. After another 110 min, the voltage was cut off, and the electrode plate was removed from the solution.

[0039] (3) Particle collection and redispersion: the collected nanoparticles were washed with 5 mL of dichloromethane and then dispersed in chloroform.

[0040] Using this method for purification, the purification rate of cadmium telluride is 93%.

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Abstract

The invention relates to a method for purifying colloid nanoparticles by using an electrophoretic deposition technology, nanoparticles required to be purified are purified by using conductive glass electrode under 200V-1200V direct current voltage. No pretreatment is required for purifying the colloid particles by using the method, a reaction solution for preparing nanoparticles can be directly purified. No any damage is generated on nano colloid particles during the purifying process, and the obtained particles are easy to separate and collect.

Description

technical field [0001] The invention relates to the field of nanomaterials, in particular to a method for purifying colloidal nanoparticles by electrophoretic deposition, the process is highly efficient, low-consumption and environmentally friendly. Background technique [0002] In the actual process of developing nanoparticles, efficient purification is a key factor at the technical level. Whether it is used in lighting, biological imaging, coatings, optoelectronics, or displays, low-cost purification can be directly performed after synthesis or in the recycling process, which will bring huge opportunities for commercialization of nanoparticle devices. Moreover, the purification process is fundamental to understanding the functionality of nanoparticles, since these properties are strongly dependent on the purification process. [0003] In non-aqueous media, the precipitation-dissolution method is most commonly used for nanoparticle purification. For example, CN 101834005A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D13/12B82Y40/00
Inventor 韩志超许杉杉
Owner WUXI ZHONGKE GUANGYUAN BIOMATERIALS
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