Manufacturing method of Mn-doped water-soluble group IIB-VIA nano particles

A nanoparticle, water-soluble technology, applied in the field of preparation of water-soluble IIB-VIA group nanoparticles, can solve problems such as restricted use

Active Publication Date: 2012-04-11
门毅
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Embodiment 1 ZnS: the preparation of Mn

[0018] 863.9mg of Zn(ClO 4 ) 2 ·6H 2 O, 62.8mg of Mn(CH 3 COO) 2 ·6H 2 O and 678.8 mg of mercaptopropylene glycol were dissolved in 200 ml of water, and the pH value of the above-mentioned mixed solution was adjusted to 8.2 with 0.5 M NaOH solution; then deoxygenated with nitrogen bubbles; after 30 minutes, 293.3 mg of NaOH 2 S·9H 2 5ml of deoxygenated aqueous solution of O was added to the solution, under the protection of nitrogen, reflux reaction for 20 hours, and then cooled to room temperature; the pH value of the solution was adjusted to 7-8 with 0.2M hydrochloric acid, then evaporated and concentrated to 30ml-50ml, and then The solution is adjusted to pH=4.5 with hydrochloric acid, and acetone is added to produce a white precipitate; after centrifugal separation and vacuum drying, a white product nanoparticle ZnS:Mn is obtained, and the luminous efficiency can reach 40%.

Embodiment 2

[0019] Embodiment 2 ZnS: the preparation of Mn

[0020] 766mg of Zn(ClO 4 ) 2 ·6H 2 O, 126mg of Mn(CH 3 COO) 2 ·6H 2 O and 669 mg of mercaptopropylene glycol were dissolved in 200 ml of water, and the pH of the above-mentioned mixed solution was adjusted to be 7.5 with 0.5 M NaOH solution, and then deoxygenated with nitrogen bubbles; after 30 minutes, 291 mg of NaOH 2 S·9H 2 Add 5ml of deoxygenated aqueous solution of O into the solution, under the protection of nitrogen, reflux for 18 hours, then cool to room temperature; use 0.2M hydrochloric acid to adjust the pH value of the solution to between 7-8, and then evaporate and concentrate to 30ml-50ml , and then adjust the solution to pH=4.0 with hydrochloric acid, and add ethanol to make it produce white precipitate; after centrifugation and vacuum drying, a white product nanoparticle ZnS:Mn is given, and the luminous efficiency can reach 20%.

Embodiment 3

[0021] Example 3 Preparation of ZnS:Mn

[0022] 950mg of Zn(ClO 4 ) 2 ·6H 2 O, 32.9 mg of Mn(CH 3 COO) 2 ·6H 2 O and 670 mg of mercaptopropylene glycol were dissolved in 200 ml of water, and the pH of the above-mentioned mixed solution was adjusted to 8.2 with 0.5 M NaOH solution; then deoxygenated with nitrogen bubbles; after 30 minutes, 290 mg of NaOH 2 S·9H 2Add 5ml of deoxygenated aqueous solution of O into the solution, under the protection of nitrogen, reflux for 18 hours; then cool to room temperature, adjust the pH value of the solution to 7-8 with 0.2M hydrochloric acid, and then evaporate and concentrate to 30ml-50ml , and then use hydrochloric acid to adjust the solution to about pH=4.5, add acetone to make it produce white precipitate; after centrifugal separation and vacuum drying, a white product nanoparticle ZnS:Mn is given, and the luminous efficiency can reach 31%.

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Abstract

The invention provides a manufacturing method of Mn-doped water-soluble group IIB-VIA nano particles, which comprises the following steps: using water as solvent to mix group IIB metal salt with manganese salt and sulfhydryl compounds, and regulating the pH value of the solution to 7.0-8.5; deoxidizing the mixed solution, adding group VIA non-metallic compounds, and heating under reflux in the presence of nitrogen gas; after the reaction is finished, cooling to room temperature, regulating the pH value of the reaction solution to 7-8, and concentrating the reaction solution; and regulating the pH value of the concentrated solution to 4-5, then adding precipitant, and carrying out centrifugal separation to obtain the Mn-doped water-soluble group IIB-VIA nano particles. Thus, efficient luminescent nano particles can be manufactured according to the manufacturing method of Mn-doped water-soluble group IIB-VIA nano particles.

Description

technical field [0001] The invention relates to a preparation method of IIB-VIA group nanoparticles, more specifically, the invention relates to a preparation method of Mn-doped water-soluble IIB-VIA group nanoparticles capable of improving fluorescence yield. Background technique [0002] Semiconductor nanoparticles, also known as quantum dots, are nanocrystals composed of group IIB-VIA, or IIIB-VA, or IVA elements. Due to quantum effects, compared with organic fluorescent materials, semiconductor nanoparticles have unique luminescent properties, such as narrow emission wavelength range, wide excitation wavelength range (as long as it is lower than its energy band), short fluorescence lifetime, and high quantum yield. Moreover, the material is stable and not easy to be degraded by light. It has broad application prospects in the fields of optoelectronic devices, solar cells, biological gene analysis, and living fluorescence imaging. [0003] At present, cadmium-group nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/56B82Y40/00
Inventor 门毅
Owner 门毅
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