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Method for preparing silver sulfide quantum dot using MOFs as carrier

A technology of silver sulfide and quantum dots, applied in chemical instruments and methods, nanotechnology for materials and surface science, nanotechnology, etc., to achieve great application prospects and good chemical stability

Inactive Publication Date: 2018-04-06
苏州影睿光学科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation of quantum dots, especially silver sulfide quantum dots, using MOFs molecules as carriers and templates has not yet been reported.

Method used

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  • Method for preparing silver sulfide quantum dot using MOFs as carrier
  • Method for preparing silver sulfide quantum dot using MOFs as carrier

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Weigh 1 mmol of silver nitrate and dissolve it in 25 mL of deionized water, then add 20 mmol of glutathione, stir well, adjust the pH value to 7.6 with ammonia water, add a certain amount of MOFs and stir for 30 min, then add 4 mL of 0.5 An aqueous solution of mmol sodium sulfide was added dropwise to the above solution, reacted at 80°C for 80 min, and washed by centrifugation to obtain silver sulfide quantum dots supported by MOFs with a fluorescence wavelength of 1200 nm. The transmission electron microscope photos are as follows: figure 1 As shown, the fluorescence spectrum as figure 2 shown.

Embodiment 2

[0022] Weigh 0.9 mmol of silver acetate and dissolve it in 20 mL of deionized water, then add 2 mmol of 5K molecular weight SH-PEG-NH 2 , stir evenly, adjust the pH value to 8.5 with ammonia water, add a certain amount of MOFs and stir for 5 minutes. 4 mL of an aqueous solution containing 0.2 mmol of sodium sulfide was added dropwise to the above solution, reacted at room temperature for 100 min, and centrifuged and washed to obtain silver sulfide quantum dots supported by MOFs.

Embodiment 3

[0024] Weigh 0.8 mmol of silver acetate and dissolve it in 30 mL of deionized water, then add 12 mmol of mercaptopropionic acid, stir well, and adjust the pH value to 10 with ammonia water. Add a certain amount of MOFs and stir. 2 mL of an aqueous solution containing 0.1 mmol of sodium sulfide was added dropwise.

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Abstract

The invention discloses a method for preparing a silver sulfide quantum dot using MOFs as a carrier. The method uses the MOFs as the carrier and a template, silver nitrate or silver acetate as a silver source, sodium sulfide as a sulfur source, and a hydrazone-containing hydrophilic reagent as a surface ligand molecule, and achieves one-step preparation of the silver sulfide quantum dot with the MOFs as the carrier in an aqueous phase system. The prepared silver sulfide quantum dot with the MOFs as the carrier has an emission wavelength between 900 and 1250 nm, has good near-infrared fluorescence and chemical stability, and can be applied to the fields of bioluminescent labeling, imaging and photoelectric devices.

Description

technical field [0001] The invention particularly relates to a method for preparing silver sulfide quantum dots with MOFs as a carrier, belonging to the technical field of material chemistry. Background technique [0002] As an important member of the metal chalcogenide family, silver sulfide has many unique properties. For example, silver sulfide is an important narrow band gap direct band gap semiconductor material, which has near-infrared fluorescence and photoelectric conversion properties. It has broad application prospects in biomedical labeling and imaging, solar cells, etc., and has become a research hotspot at home and abroad. The carrier can load the silver sulfide nano particles so that they can be uniformly dispersed in the carrier and maintain various properties of the nano material. Therefore, it is of great significance to develop a preparation method of silver sulfide nanocrystals with simple process and uniform dispersion in the carrier. [0003] Metal-or...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/06C09K11/58B82Y20/00B82Y30/00B82Y40/00
CPCC09K11/582B82Y20/00B82Y30/00B82Y40/00C09K11/06
Inventor 孙国凤刘莉丽
Owner 苏州影睿光学科技有限公司
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