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Method of assembling quantum dot in mesoporous silica dioxide

A technology of mesoporous silica and quantum dots, applied in chemical instruments and methods, luminescent materials, etc., can solve the problem that the particle size of cadmium selenide quantum dots is not easy to control, and achieves high yield, convenient operation and simple equipment. Effect

Inactive Publication Date: 2007-08-08
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The size range of the quantum dots prepared by this method is relatively wide, and the particle size of the cadmium selenide quantum dots assembled in the mesoporous silica pores is not easy to control

Method used

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  • Method of assembling quantum dot in mesoporous silica dioxide
  • Method of assembling quantum dot in mesoporous silica dioxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] A. Weigh 1.0 g of SBA-15 and place it in a flask, add 10 ml of aminopropyltrimethoxysilane and 100 ml of anhydrous toluene at room temperature and nitrogen atmosphere, mix and react, and let stand for 48 hours to obtain SBA -15-NH 2 precursor solution.

[0029] B. Weigh 0.2g of precursor SBA-15-NH 2 solution, add 50 ml of ethanol and 0.01 mol of cadmium acetate, stir vigorously, use the amino groups in the pores of mesoporous silica to complex Cd 2+ , generating SBA-15-Cd 2+ precursor solution.

[0030] C. Weigh 0.2g of SBA-15-Cd 2+ The precursor solution, 2g of trioctylphosphine oxide (TOPO), was placed in a three-necked flask and heated to 220°C.

[0031] D. At the same time, weigh 0.15g of Se powder into a pear-shaped bottle, operate in a glove box, and add 2ml of tributylphosphine to generate SeTBP.

[0032] E. Use a syringe to quickly inject SeTBP into the solution synthesized in step C, and stir at the same time. After the injection, start timing with a stop...

Embodiment 2

[0037] A. Weigh 1.0 g of SBA-15 in a flask, add 10 ml of aminopropyltrimethoxysilane and 100 ml of anhydrous toluene at room temperature and nitrogen atmosphere, mix and react, and let stand for 48 hours to obtain the precursor SBA -15-NH 2 solution.

[0038] B. Weigh 0.2g of precursor SBA-15-NH 2 , add 50 ml of ethanol and 0.01 mol of cadmium acetate, stir vigorously, use the amino groups in the pores of mesoporous silica to complex Cd 2+ , generating SBA-15-Cd 2+ precursor solution.

[0039] C. Weigh 0.2g of SBA-15-Cd 2+ The precursor solution, 2g of trioctylphosphine oxide (TOPO), was placed in a three-necked flask and heated to 250°C.

[0040] D. At the same time, weigh 0.02g of tellurium powder into a pear-shaped bottle, operate in a glove box, and add 4ml of tributylphosphine to generate TeTBP.

[0041] E. Quickly inject TeTBP into the solution generated in step C with a syringe while stirring. Start timing with a stopwatch after the injection, and take samples wi...

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Abstract

The invention discloses an assembling method of quantum point in the dielectric silica, which comprises the following steps: adopting SBA-15 as mould; making amino propyl trimethoxy silane to decorate dielectric silica; adding cadmium acetate; adsorbing Cd2+ in the channel to form SBA-15-Cd2+; reacting with TOPO, Se or Te; controlling reacting time to the grain size of cadmium selenide of quantum point of or cadmium telluride in the channel.

Description

technical field [0001] The invention relates to a method for assembling II-VI group semiconductor nanomaterials in mesoporous silicon dioxide, specifically, the semiconductor material cadmium selenide or cadmium telluride is assembled in mesoporous silicon dioxide by a high-temperature pyrolysis method In the pores of (SBA-15), cadmium selenide or cadmium telluride quantum dot materials are formed. Background technique [0002] In recent years, the preparation of nano-semiconductor materials has attracted great attention. The unique optical properties of cadmium selenide and cadmium telluride have broad application prospects in biological labels, fluorescent displays, light-emitting diodes, and solar cells. Therefore, it is of great practical significance to find a convenient preparation method of cadmium selenide and cadmium telluride quantum dots with adjustable particle size. The new generation of mesoporous silica materials have uniform and adjustable pore size in nano...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/00C09K11/56C09K11/88
Inventor 包健沈悦孙艳吴杰胡古今戴宁
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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