Method for detecting chloroform in sulfur-containing quantum dot solution

A quantum dot solution and quantum dot technology, which are applied in measurement devices, chemical method analysis, instruments, etc., can solve the problems of cumbersome preparation process, high price, and inability to accurately know when the impurity removal is completed.

Inactive Publication Date: 2020-05-08
TCL CORPORATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the quantum dot solution of residual chloroform is used to prepare the device, the chloroform will corrode the surface of the device, resulting in a decrease in device life and luminous efficiency. Therefore, before using the quantum dot solution to prepare the device, the chloroform remaining in the quantum dot solution must be removed.
However, the preparation process of the materials used for chloroform removal of impurities is cumbersome, expensive, and used in large quantities, and it is impossible to know exactly when the removal of impurities is completed. A fast and accurate method suitable for the qualitative detection of the presence of chloroform in quantum dot solutions

Method used

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  • Method for detecting chloroform in sulfur-containing quantum dot solution
  • Method for detecting chloroform in sulfur-containing quantum dot solution

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preparation example Construction

[0027] In this embodiment, the preparation method of the glass whose surface is covered with a carbonate film comprises the steps of: providing a carbonate sol; spin-coating the carbonate sol on the surface of the glass by spin-coating method, so that the carbon The salt sol is evenly spread on the surface of the glass to form a film, and the glass is dried to obtain a glass covered with a carbonate film.

[0028] Preferably, the glass is sequentially placed in acetone, ethanol and water for ultrasonic treatment for 20 minutes to obtain cleaned glass, then the glass is fixed on a spin coater, and the pre-prepared carbonate sol is added dropwise on the On the glass, control the spin coater to rotate at a high speed of 5000-10000r / min for 20 s, so that the carbonate sol is evenly spread into a thin film, placed at room temperature to allow it to dry naturally, and then placed in a vacuum drying oven to dry for 6 h. A glass whose surface is covered with a carbonate film is produc...

Embodiment 1

[0048] Fabrication of surface covered with Ag by spin-coating method 2 CO 3 Thin-film glass and used for qualitative detection and impurity removal of chloroform in sulfur-containing quantum dot solution:

[0049] 1), Ag 2 CO 3 Preparation of the sol: Sonicate the glass in acetone, ethanol, and water for 20 min, and dry it for use; in 50 ml of 2mol / l AgNO 3 Add 0.1 mol sodium lauryl sulfate to the solution, stir for 30 min to fully dissolve, slowly add 50 ml of 1 mol / l Na 2 CO 3 solution, suction filtered, washed with distilled water three times, dried in an oven at 90 degrees Celsius for 12 h, and ground into powder for later use; 10 mg Ag 2 CO 3 Powder and 50 mg 3A molecular sieve were ultrasonically dispersed in 10 ml ethanol, 50 mg PEG6000 was dissolved in 1 ml deionized water, Ag 2 CO 3 Slowly add the ethanol solution, this process is carried out on a magnetic stirrer, stirring at a high speed while heating, and then put the mixed solution in a water bath at 70 de...

Embodiment 2

[0056] Preparation of Ag by Electrospinning2 CO 3 Solid film and used for qualitative detection and impurity removal of chloroform in sulfur-containing quantum dot solution:

[0057] 1) Preparation of silver carbonate sol: Ag 2 CO 3 The preparation method of sol is identical with embodiment 1, promptly in the AgNO of 50 ml 2 mol / l 3 Add 0.1 mol sodium lauryl sulfate to the solution, stir for 30 min to fully dissolve, slowly add 50 ml 1 mol / l Na 2 CO 3 The solution was suction filtered, washed three times with distilled water, dried in an oven at 90°C for 12 h, and ground into powder for later use. 10mg Ag 2 CO 3 and 50 mg 3A molecular sieve were ultrasonically dispersed in 10 ml ethanol, 50 mg PEG6000 was dissolved in 1 ml deionized water, Ag 2 CO 3 The ethanol solution was slowly added to it. This process is carried out on a magnetic stirrer, stirring at a high speed while heating, and then the mixed solution is placed in a water bath at 70 degrees Celsius for 4 hour...

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Abstract

The invention discloses a method for detecting chloroform in a sulfur-containing quantum dot solution. The method comprises the following steps of: providing an initial sulfur-containing quantum dot solution; carrying out illumination treatment on the initial sulfur-containing quantum dot solution; and putting one section or all of the part, covered with a carbonate film, of a carrier for testinginto the sulfur-containing quantum dot solution subjected to illumination treatment, and judging whether the initial sulfur-containing quantum dot solution contains chloroform or not. According to themethod provided by the invention, whether chloroform exists in the sulfur-containing quantum dot solution can be simply, visually and efficiently judged accurately.

Description

technical field [0001] The invention relates to the field of qualitative detection of chloroform, in particular to a method for detecting chloroform in a sulfur-containing quantum dot solution. Background technique [0002] In the process of preparing the quantum dot solution, usually after the last cleaning of the quantum dots, the quantum dots need to be washed down with chloroform and transferred to a sample bottle, and then the sample bottle is placed in a vacuum drying oven to evaporate the chloroform to dryness to obtain quantum dots. Dot powder, and then use a suitable solvent (normally n-octane or n-hexane) to dissolve to obtain a quantum dot solution. acetone, etc.). Among them, chloroform remains in the quantum dot solution because it cannot be evaporated completely, which will corrode the plastic sample bottle cap; it will have a great impact on the purity of the quantum dot product and the performance of the quantum dot; the device will corrode the surface of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/00
CPCG01N31/00
Inventor 霍蕊芦子哲
Owner TCL CORPORATION
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