Method for synthesizing Pt: ZnSe(S) alloy nano crystal by aqueous phase process

An alloy nanocrystal, water phase technology, applied in chemical instruments and methods, luminescent materials, etc., can solve problems such as low fluorescence quantum yield, and achieve the effects of good water solubility, reduced toxicity and cost, and stable water solubility

Inactive Publication Date: 2013-05-22
YUNNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is exactly for the problem that the fluorescence quantum yield of water-soluble transition metal doped ZnSe nanocrystal is generally relatively low, proposes a kind of method of aqueous phase method to synthesize transition metal Pt doped ZnSe nanocrystal

Method used

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  • Method for synthesizing Pt: ZnSe(S) alloy nano crystal by aqueous phase process
  • Method for synthesizing Pt: ZnSe(S) alloy nano crystal by aqueous phase process
  • Method for synthesizing Pt: ZnSe(S) alloy nano crystal by aqueous phase process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. First mix 0.439g of zinc acetate and 1.0614g of 3-mercaptopropionic acid, dilute to 50ml with water in a 250ml three-necked flask, mix and stir for 5 minutes.

[0032] 2. Add 10ml of 0.001M platinum tetrachloride solution to the solution in step 1, and continue stirring for 5 minutes.

[0033] 3. The pH of the solution in step 2 was adjusted to 8 with sodium hydroxide solution, at this time, argon gas was passed into the alkaline solution, and oxygen was removed by bubbling for 10 minutes to obtain an oxygen-free aqueous solution.

[0034] 4. Under the protection of argon, dissolve 0.079g of selenium powder and 0.0757g of sodium borohydride in 5ml of ultrapure water, heat to 40°C, and react for 30 minutes to prepare NaHSe stock solution.

[0035] 5. Quickly inject the NaHSe stock solution prepared in step 4 into the alkaline anaerobic aqueous solution prepared in step 3.

[0036] 6. The solution prepared in step 5 starts to heat up under the protection of an inert g...

Embodiment 2

[0039] 1. First mix 0.6585g of zinc acetate and 0.9553g of 3-mercaptopropionic acid, add water to a 250ml three-neck flask to dilute to 60ml, mix and stir for 10 minutes.

[0040] 2. Add 10ml of 0.002M platinum tetrachloride solution to the solution in step 1, and continue stirring for 5 minutes.

[0041] 3. The pH of the solution in step 2 was adjusted to 9 with sodium hydroxide solution, at this time, argon gas was passed into the alkaline solution, and oxygen was removed by bubbling for 20 minutes to obtain an oxygen-free aqueous solution.

[0042] 4. Under the protection of argon, dissolve 0.079g of selenium powder and 0.1136g of sodium borohydride in 1ml of ultrapure water, heat to 50°C, and react for 1 minute to prepare NaHSe stock solution.

[0043] 5. Quickly inject the NaHSe stock solution prepared in step 4 into the alkaline anaerobic aqueous solution prepared in step 3.

[0044] 6. The solution prepared in step 5 starts to heat up under the protection of an inert gas...

Embodiment 3

[0047] 1. First mix 1.0975g of zinc acetate and 1.0614g of 3-mercaptopropionic acid, dilute to 70ml with water in a 250ml three-necked flask, mix and stir for 15 minutes.

[0048] 2. Add 10ml of 0.004M platinum tetrachloride solution to the solution in step 1, and continue stirring for 5 minutes.

[0049] 3. Adjust the pH of the solution in step 2 to 9.5 with sodium hydroxide solution. At this time, nitrogen gas is passed into the alkaline solution, and oxygen is removed by bubbling for 15 minutes to obtain an oxygen-free aqueous solution.

[0050] 4. Under nitrogen protection, dissolve 0.079g of selenium powder and 0.1514g of sodium borohydride in 20ml of ultrapure water, heat to 80°C, and react for 5 minutes to prepare NaHSe stock solution.

[0051] 5. Quickly inject the NaHSe stock solution prepared in step 4 into the alkaline anaerobic aqueous solution prepared in step 3.

[0052] 6. The solution prepared in step 5 starts to heat up under the protection of an inert gas, a...

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Abstract

The invention belongs to the technical field of preparation methods of nano luminescent materials, and in particular relates to a method for synthesizing a Pt: ZnSe(S) alloy nano crystal by an aqueous phase process. The method comprises the step of preparing a water-soluble Pt: ZnSe(S) alloy nano crystal by using ultrapure water as a solvent, as well as inorganic metal water-soluble compounds such as zinc salt, platinum salt and the like, a selenium powder and a carboxylic acid reagent containing a sulfydryl group as raw materials. According to the invention, cheap raw materials are used instead of an expensive and dangerous organic metal precursor, thus the method is environmentally-friendly, and the preparation cost is reduced; the operation is simple, safe and good in repeatability; and the synthesized nano crystal has a good crystal form and uniform size.

Description

technical field [0001] The invention relates to a method for preparing a nano-luminescent material. Water-soluble Pt:ZnSe(S) alloy nano-crystals are synthesized by using an aqueous phase method. Background technique [0002] Semiconductor nanocrystals have the characteristics of high quantum efficiency, wide and continuous excitation spectrum, symmetrical and narrow emission spectrum, the color of emitted light changes with particle size, and good photochemical stability. Compared with traditional fluorescent dyes, they have incomparable advantages. . If the problems of biocompatibility and biotoxicity can be solved, quantum dots will play a huge role in cell recognition, cell staining, disease diagnosis, and real-time monitoring of the migration of biological components. With the gradual deepening of research, semiconductor nanocrystals as biomarkers have become an emerging, cutting-edge and most active research field in analytical science. [0003] At present, the applic...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/88
Inventor 蒋峰芝贾明芬袁波
Owner YUNNAN UNIV
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