Method for separating out single-size indium nanocubes by means of onion extracting solutions

Abstract

The invention relates to a method for separating out single-size indium nanocubes by means of onion extracting solutions. The method comprises the steps that 1) onions are sequentially subjected to washing, cutting, squeezing, filtering and centrifuging, then supernate is sucked, and an onion extracting solution is obtained; 2) the indium nanocubes are subjected to ultrasonic dispersion in ultrapure water, and uniform dispersion liquid is prepared; 3) the onion extracting solutions with different concentrations are prepared; 4) the onion extracting solutions with different concentrations are added into centrifugal pipes in sequence, and a density gradient solution is prepared; and 5) the indium nanocube dispersion liquid is added to the onion extracting solution density gradient solution for centrifuging. Since the settling velocities of indium nanocubes of different sizes in the onion extracting solution density gradient solution are different, the indium nanocubes are retended in different positions of the density gradient solution, then the single-size indium annocubes are obtained after the onion extracting solution is eluted by using 42 DEG C hot water, and accordingly, a separating effect is achieved. The method provided by the invention has the advantages that the density gradient medium solution is low in cost, environmentally friendly, and good in separating effect.

Description

technical field [0001] The invention relates to a method for separating single-sized indium nanocubes from an onion extract, and belongs to the technical field of advanced nanoparticle separation technology. Background technique [0002] Nanomaterials perform better than ordinary materials due to smaller particles and more active reaction sites. Therefore, obtaining nanomaterials with uniform particle size distribution is very important for their application and development. [0003] At present, there are many methods and ways to prepare nanomaterials with uniform particle size distribution. However, these methods and approaches generally need to be carried out under harsh conditions, and the cost is high. In recent years, a density gradient centrifugation method has been developed to obtain nanomaterials composed of single-sized nanoparticles of different sizes. Due to the different properties of nanoparticles composed of different elements, different separation media ar...

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Problems solved by technology

In addition, according to the patent CN101559401A (a method for separating nanoparticles by density gradient centrifugation rate in aqueous phase), obtaining carbohydrates and proteins from onions, no matter whether they are used alone or in combination, the density gradient centrifugation of indium nanocubes cannot be achieved.

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