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Nanofiltration membrane and preparation method thereof as well as preparation method of fluorescent graphene quantum dots

A technology of graphene quantum dots and nanofiltration membranes, applied in chemical instruments and methods, membrane technology, luminescent materials, etc., can solve problems such as difficulty in making size, high luminous efficiency fluorescent graphene quantum dots, etc.

Active Publication Date: 2014-04-16
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In view of the shortcomings of the prior art described above, the object of the present invention is to provide a nanofiltration membrane and a preparation method thereof, and a preparation method for fluorescent graphene quantum dots, which are used to solve the problem that it is difficult to make small and uniform sizes in the prior art. And the problem of fluorescent graphene quantum dots with high luminous efficiency

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  • Nanofiltration membrane and preparation method thereof as well as preparation method of fluorescent graphene quantum dots
  • Nanofiltration membrane and preparation method thereof as well as preparation method of fluorescent graphene quantum dots
  • Nanofiltration membrane and preparation method thereof as well as preparation method of fluorescent graphene quantum dots

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Experimental program
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Embodiment 1

[0103] First, the preparation method of the nanofiltration membrane provided in this embodiment includes:

[0104] Provide high-purity aluminum plate;

[0105] Polishing treatment is carried out so that the high-purity aluminum plate has a clean and smooth surface. In the polishing treatment, the temperature is set at 0° C., and a voltage of 25V is applied in a mixed solution of perchloric acid and ethanol with a volume ratio of 1:4 to carry out The time is 10 minutes;

[0106] Carrying out the first anodic oxidation on the high-purity aluminum plate, the condition is to carry out in 0.3mol / L oxalic acid, the setting voltage is 50V, the temperature is 0°C, and the time is 2h to obtain the first aluminum oxide layer;

[0107] Putting the aluminum plate and the first aluminum oxide layer into chromic acid for heat treatment for 2 hours;

[0108] The second anodic oxidation of the high-purity aluminum plate is carried out in 0.3mol / L oxalic acid, the set voltage is 50V, the tem...

Embodiment 2

[0126] First, the preparation method of the nanofiltration membrane provided in this embodiment includes:

[0127] Provide high-purity aluminum plate;

[0128] Polishing treatment is carried out so that the high-purity aluminum plate has a clean and smooth surface. In the polishing treatment, the temperature is set at 0° C., and a voltage of 25V is applied in a mixed solution of perchloric acid and ethanol with a volume ratio of 1:4 to carry out The time is 10 minutes;

[0129] Carrying out the first anodic oxidation on the high-purity aluminum plate, the condition is to carry out in 0.3mol / L oxalic acid, set the voltage to 195V, the temperature is 0°C, and the time is 2h to obtain the first aluminum oxide layer;

[0130] Putting the aluminum plate and the first aluminum oxide layer into chromic acid for heat treatment for 2 hours;

[0131] Carry out the second anodic oxidation on the high-purity aluminum plate, the condition is to carry out in 0.3mol / L oxalic acid, set the ...

Embodiment 3

[0145] First, the preparation method of the nanofiltration membrane provided in this embodiment includes:

[0146] Provide high-purity aluminum plate;

[0147] Polishing treatment is carried out so that the high-purity aluminum plate has a clean and smooth surface. In the polishing treatment, the temperature is set at 0° C., and a voltage of 25V is applied in a mixed solution of perchloric acid and ethanol with a volume ratio of 1:4 to carry out The time is 10 minutes;

[0148] Carrying out the first anodic oxidation on the high-purity aluminum plate, the condition is to carry out in 0.3mol / L oxalic acid, the setting voltage is 50V, the temperature is 0°C, and the time is 2h to obtain the first aluminum oxide layer;

[0149] Putting the aluminum plate and the first aluminum oxide layer into chromic acid for heat treatment for 2 hours;

[0150] The second anodic oxidation of the high-purity aluminum plate is carried out in 0.3mol / L oxalic acid, the set voltage is 50V, the tem...

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Abstract

The invention provides a nanofiltration membrane and a preparation method thereof as well as a preparation method of fluorescent graphene quantum dots. The nanofiltration membrane at least comprises a function layer and a support layer, wherein the function layer comprises a plurality of first filter holes penetrating through the function layer; the support layer is connected with the function layer and comprises a plurality of second filter holes penetrating through the support layer; the apertures of the second filter holes are greater than those of the first filter holes; one second filter hole is communicated with at least one first filter hole. The nanofiltration membrane can effectively achieve separation of nanoscale particles, and the separated particles are uniform in size. The invention also provides a method for preparing fluorescent graphene quantum dots by the nanofiltration membrane, and the finally obtained fluorescent graphene quantum dots are high in luminous efficiency and high in quantum yield.

Description

technical field [0001] The invention relates to the technical field of new inorganic materials, in particular to a nanofiltration membrane, a preparation method thereof, and a preparation method of fluorescent graphene quantum dots. Background technique [0002] As a quasi-zero-dimensional nanomaterial of carbon quantum dots, graphene quantum dots have the advantages of carbon quantum dots, such as chemical inertness, low toxicity, good biocompatibility, anti-photobleaching, size and wavelength dependence It also has the unique structure and excellent characteristics of graphene, such as high specific surface area and good conductivity. Graphene quantum dots have potential applications in many fields, such as solar photovoltaic cells, detection, catalysis, bioimaging, drug delivery and other fields. [0003] Since graphene quantum dots are widely used and have good prospects, there are many preparation technologies for graphene quantum dots. At present, the main way to pre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D69/10B01D71/02B01D67/00C09K11/65
Inventor 孙静丁古巧杨思维何朋李修兵徐旭光谢晓明江绵恒
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI
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