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Fluorescent carbon quantum dot and preparation method and application thereof

A carbon quantum dot and fluorescence technology, which is applied in the field of fluorescent carbon quantum dots, can solve the problems of complicated and expensive instruments and equipment, and achieve the effects of good solubility and dispersibility, low price and wide source.

Inactive Publication Date: 2017-07-18
SHANXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the equipment required by these methods is complex and expensive. Therefore, it is necessary to develop a simple, fast, sensitive and non-toxic method for the detection of sulfur ions.

Method used

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  • Fluorescent carbon quantum dot and preparation method and application thereof
  • Fluorescent carbon quantum dot and preparation method and application thereof
  • Fluorescent carbon quantum dot and preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0033] Step 1, weigh 0.3303g asparagine and 0.45g glucose respectively and place them in a beaker, then add 3mL sodium hydroxide (1M / L) solution water, stir well, and obtain a clear solution by ultrasonication;

[0034] Step 2, placing the beaker with the clear solution in an oil bath, heating at 200°C for 30 minutes to obtain a light yellow solid;

[0035] Step 3, take out the beaker, cool naturally, add 10mL of secondary water into it, stir and dissolve to obtain a light yellow solution, remove insoluble matter by filtration to obtain a clear light yellow solution, pass through a 500-1000Da dialysis bag, and dialyze in a glass container for 1 Remove impurities every day and change the water every 4 hours to get a pure aqueous solution of fluorescent carbon quantum dots;

[0036] In step 4, the fluorescent carbon quantum dot aqueous solution is freeze-dried to obtain the fluorescent carbon quantum dot, and its relative quantum yield (using quinine sulfate as a standard) is 12...

Embodiment 2

[0038] Step 1, weigh 0.2202g asparagine and 0.45g glucose respectively and place them in a beaker, then add 3mL sodium hydroxide (1M / L) solution water, stir well, and obtain a clear solution by ultrasonication;

[0039] Step 2, placing the beaker with the clear solution in an oil bath, heating at 200°C for 30 minutes to obtain a light yellow solid;

[0040] Step 3, take out the beaker, cool naturally, add 10mL of secondary water into it, stir and dissolve to obtain a light yellow solution, remove insoluble matter by filtration to obtain a clear light yellow solution, pass through a 500-1000Da dialysis bag, and dialyze in a glass container for 1 Remove impurities every day and change the water every 4 hours to get a pure aqueous solution of fluorescent carbon quantum dots;

[0041] In step 4, the fluorescent carbon quantum dot aqueous solution is freeze-dried to obtain the fluorescent carbon quantum dot, and its relative quantum yield (based on quinine sulfate) is 6.12%.

Embodiment 3

[0043] Step 1, weigh 0.3303g asparagine and 0.34g glucose respectively and place them in a beaker, then add 3mL sodium hydroxide (1M / L) solution water, stir well, and obtain a clear solution by ultrasonication;

[0044] Step 2, placing the beaker with the clear solution in an oil bath, heating at 200°C for 30 minutes to obtain a light yellow solid;

[0045] Step 3, take out the beaker, cool it naturally, add 10mL of secondary water into it, stir and dissolve to obtain a light yellow solution, remove insoluble matter by filtration to obtain a clear light yellow solution, pass through a 500-1000Da dialysis bag, and dialyze in a glass container 1 Remove impurities every day and change the water every 4 hours to get a pure aqueous solution of fluorescent carbon quantum dots;

[0046] In step 4, the fluorescent carbon quantum dot aqueous solution is freeze-dried to obtain the fluorescent carbon quantum dot, and its relative quantum yield (based on quinine sulfate) is 9.23%.

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Abstract

The invention discloses a fluorescent carbon quantum dot and a preparation method and application thereof. The preparation method of the carbon quantum dot is as follows: taking glucose and asparagine as raw materials, adding a sodium hydroxide aqueous solution, carrying out ultrasonic treatment to obtain a clarified solution, heating to 200 DEG C by an oil bath to react for 30 minutes to obtain solids, and dissolving, filtering and dialyzing to obtain a nitrogen-doped water-soluble fluorescent carbon quantum dot. The preparation process of the carbon quantum dot in the invention is simple, and the prepared carbon quantum dot is stable in optical properties and good in biological compatibility. The carbon quantum dot in the invention can be used for analyzing and detecting Fe<3+> and S<2->, and can also be used in the fields of living cell biological imaging and the like.

Description

technical field [0001] The invention relates to a fluorescent carbon quantum dot, in particular to a fluorescent carbon quantum dot and its preparation method and application. Background technique [0002] In recent years, as a new functional nanomaterial, carbon quantum dots have received great attention and extensive research due to their superior optical properties, good biocompatibility, and low toxicity. It has great advantages such as adjustable range, high fluorescence quantum efficiency, good photostability, easy functionalization, low price, easy large-scale synthesis, and basically non-toxic, which is more in line with the needs of cell labeling and biomedical imaging. Therefore, carbon quantum dots have shown important application value in the fields of metal ion and small molecule fluorescent probes, biosensing, bioanalysis, and photocatalysis. [0003] The trace element iron is a very important and indispensable trace element in the human body. Among more than...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/15C09K11/65G01N21/64B82Y20/00B82Y40/00
CPCG01N21/643B82Y20/00B82Y40/00C01P2006/60C09K11/65G01N21/6486G01N2021/6432
Inventor 高艺芳韩辉弓晓娟刘洋路雯婧双少敏董川
Owner SHANXI UNIV
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