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Zinc selenide nano crystal in situ growth method in silicon dioxide gel glass substrate

A technology of gel glass and silicon dioxide, which is applied in the field of new optical functional materials, can solve the problems of restricting the research and development of zinc selenide nanocrystalline glass materials, wide size distribution of functional nanoparticles, and high price, and achieve narrow size distribution, Small size, low cost effect

Inactive Publication Date: 2004-02-18
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Other semiconductor glass-ceramic materials prepared by melting method have a wide size distribution of functional nanoparticles, which is difficult to control, generally around 20%. Due to the limitation in this respect, this method is restricted from being used to prepare zinc selenide nanocrystalline glass Material research and development
The use of physical methods to prepare such complex process equipment is very expensive, and the preparation is mainly thin film materials, and the size of functional nanoparticles is generally above 20nm, which also limits the function of this material.

Method used

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  • Zinc selenide nano crystal in situ growth method in silicon dioxide gel glass substrate
  • Zinc selenide nano crystal in situ growth method in silicon dioxide gel glass substrate
  • Zinc selenide nano crystal in situ growth method in silicon dioxide gel glass substrate

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Effect test

Embodiment 1

[0027] The preparation method of said gel precursor comprises the following steps successively:

[0028] a. The initial raw materials for preparing gel glass are regular ethyl acetate, absolute ethanol, deionized water, and selenic acid. Their molar ratio is: 1:2-4:4-5:0.0025-0.005; absolute ethanol is used as a dispersant for normal acid ethyl ester, deionized water is used for hydrolysis reaction, and selenic acid is used as a catalyst for hydrolysis reaction.

[0029] B. The introduction of selenium source and zinc source adopts the form of zinc selenate: take zinc acetate and selenic acid in a molar ratio of 1:1, first dissolve zinc acetate in an appropriate amount of deionized water, and then add the weighed selenic acid , fully stirred, heated and evaporated to precipitate zinc selenate, and set aside.

[0030] c. First disperse regular acid ethyl ester in absolute ethanol, stir evenly; then add deionized water, and dropwise add selenic acid with a molar concentration o...

Embodiment 2

[0036] The preparation method of said gel precursor comprises the following steps successively:

[0037] a. The initial raw materials for preparing gel glass are regular ethyl acetate, absolute ethanol, deionized water, and hydrochloric acid. Their molar ratio is: 1:2-4:4-5:0.0025-0.005; absolute ethanol is used as a dispersant for normal acid ethyl ester, deionized water is used for hydrolysis reaction, and hydrochloric acid is used as a catalyst for hydrolysis reaction.

[0038] B, the introduction of selenium source and zinc source adopts the form of zinc selenate; According to molar ratio 1: 1, take by weighing zinc acetate and selenic acid, first zinc acetate is dissolved in appropriate amount of deionized water, then add the selenic acid that weighs , fully stirred, heated and evaporated to precipitate zinc selenate, and set aside.

[0039] c. Disperse TEOS in absolute ethanol and stir evenly; then add deionized water, and dropwise add hydrochloric acid with a molar con...

Embodiment 3

[0045] The preparation method of said gel precursor comprises the following steps successively:

[0046]a. The initial raw materials for preparing gel glass are regular ethyl acetate, absolute ethanol, deionized water, and nitric acid. Their molar ratio is: 1:2-4:4-5:0.0025-0.005; absolute ethanol is used as a dispersant for normal acid ethyl ester, deionized water is used for hydrolysis reaction, and nitric acid is used as a catalyst for hydrolysis reaction.

[0047] B, the introduction of selenium source and zinc source adopts the form of zinc selenate; Take by weighing zinc acetate and selenic acid in molar ratio 1: 1, zinc acetate is dissolved in appropriate amount of deionized water earlier, then add the selenic acid that weighs , fully stirred, heated and evaporated to precipitate zinc selenate, and set aside.

[0048] c. First disperse regular acid ethyl ester into absolute ethanol, stir evenly; then add deionized water, and dropwise add nitric acid with a molar concen...

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Abstract

A process for in-situ growth of zinc selenide nanocrystals in SiO2 gel glass matrix features that the reagent for gel glass contains ethyl ester of normal acid, absolute alcohol and selenic acid as hydrolyzing catalyst, the Se and Zn sources are introduced in zinc selenate form, after the sol is poured in culture dish and the culture dish is covered by filter paper. It is laid aside for more than6 weeks to obtain transparent dried gel, and the dried gel is thermally treated by two steps to obtain zinc selenide.

Description

1. Technical field [0001] The invention belongs to a novel photofunctional material, in particular to a method for preparing zinc selenide nanocrystal in-situ growth method in silica gel glass matrix. 2. Background technology [0002] The traditional method of preparing semiconductor glass-ceramics is the melting method, which is widely used. Sol-gel technology is a low-temperature method for preparing semiconductor nanocrystalline glass materials, which has been used to prepare several II-VI compound semiconductor nanocomposites. However, due to the complexity of the technical process in the preparation of ZnSe glass-ceramics, the research and development have been greatly restricted, and no commercial products have appeared so far. The new methods that can prepare this material mainly use physical methods, such as laser flash evaporation and magnetron sputtering, which are only suitable for preparing thin film materials. Other semiconductor glass-ceramic materials prepar...

Claims

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Application Information

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IPC IPC(8): C01B33/14C03B20/00C03C1/00C03C10/00C03C10/04C04B35/16
CPCC03C2203/36C03C10/0009C03C1/006C03C2203/32
Inventor 姚熹汪敏强张良莹姜海青王云鹏孔凡滔刘宏凌
Owner XI AN JIAOTONG UNIV
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