A rapid purification method of gold clusters based on ultrafiltration

A purification method and technology of gold clusters, which can be used in metal processing equipment, transportation and packaging, etc., can solve the problems of long time, polluting the environment, and cumbersome operation.

Active Publication Date: 2021-06-15
THE SECOND HOSPITAL AFFILIATED TO WENZHOU MEDICAL COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above-mentioned methods have problems such as time-consuming, cumbersome operation, high cost, low yield, and dependence on organic reagents (environmental pollution) to varying degrees.

Method used

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  • A rapid purification method of gold clusters based on ultrafiltration
  • A rapid purification method of gold clusters based on ultrafiltration
  • A rapid purification method of gold clusters based on ultrafiltration

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Experimental program
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Effect test

Embodiment 1

[0021] The technical scheme of this embodiment is as follows: add 4 mL of untreated gold cluster crude product solution into the inner tube of the ultrafiltration tube (the specification is 3 kDa), and place the ultrafiltration tube in a low-speed refrigerated centrifuge for centrifugation at a speed of 3800 rpm / min, the centrifugation time is 160min, and the temperature is 4°C. Figure 4 It shows that after centrifugation, the volume of the purified and concentrated gold cluster solution contained in the inner tube is about 150uL, and most of the solvent and small molecule impurities in the original solvent have been centrifuged into the outer tube. Figure 5 It shows that there are a large number of miscellaneous peaks in the wavelength range of 200-300nm in the ultraviolet spectrum before purification, showing that there are various impurities in the crude product solution of gold clusters, and the characteristic peaks of gold clusters (near 650nm) are weak; after purificat...

Embodiment 2

[0023] The technical scheme of this embodiment is as follows: 4 mL of untreated gold cluster crude product solution is added to the inner tube of the ultrafiltration tube (the specification is 3 kDa), and the ultrafiltration tube is placed in a low-speed refrigerated centrifuge for centrifugation at a speed of 3500 rpm / min, the centrifugation time is 100min, and the temperature is 4°C. Figure 4 It shows that after centrifugation, the volume of the purified and concentrated gold cluster solution contained in the inner tube is about 150uL, and most of the solvent and small molecule impurities in the original solvent have been centrifuged into the outer tube. Figure 5 It shows that there are a large number of miscellaneous peaks in the wavelength range of 200-300nm in the ultraviolet spectrum before purification, showing that there are various impurities in the crude product solution of gold clusters, and the characteristic peaks of gold clusters (near 650nm) are weak; after pu...

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Abstract

The invention relates to a method for fast purification of gold clusters based on ultrafiltration, comprising the following steps: 4 mL of untreated crude product solution of gold clusters is placed in the inner tube of an ultrafiltration tube (the specification is 3KDa), and then the ultrafiltration The tube is placed in a low-speed refrigerated centrifuge for centrifugation, the speed is 3500-4000 rpm, the centrifugation time is 100-180 minutes, and the temperature is 4°C. During the centrifugation process, small molecules and other impurities in the solution are filtered into the outer tube under the action of centrifugal force , the purified gold clusters were obtained in the inner tube. The machine has the characteristics of convenient operation, fast and efficient, green and environmental protection.

Description

technical field [0001] The invention belongs to the field of material purification, and specifically refers to a rapid purification method of gold clusters based on ultrafiltration. Background technique [0002] Gold clusters generally refer to gold nanomaterials with a size below 2nm. Au clusters have significant quantum size effects that give them a discrete electronic structure at the center of the cluster core, so the spectra show molecular-like single-electron transitions rather than surface plasmon resonances of ordinary nanomaterials. The unique geometry and electronic structure of gold clusters make it produce many interesting properties, such as chirality, magnetism, redox properties, photovoltaic properties, etc. (see Santosh Kumar et.al, Water-solubleAu 25 (Capt) 18 nanoclusters: synthesis, thermal stability, and optical properties, Nanoscale, 2012, 4, 4222). These characteristics make gold clusters widely used in many aspects. In recent years, scientists in va...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00
CPCB22F1/07B22F1/14B22F1/054
Inventor 林振坤薛甜甜苏宇齐金霞徐艺唐国庭刘雨欣
Owner THE SECOND HOSPITAL AFFILIATED TO WENZHOU MEDICAL COLLEGE
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