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Method used for preparing ZnO/SiO2 nano composite material

A technology of nano-composite materials and mixed solution, applied in the field of preparing ZnO/SiO2 nano-composite materials, can solve the problems of long time, high cost, complicated steps, etc., and achieve the effect of reducing the amount of use and simple reaction

Inactive Publication Date: 2015-09-16
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In order to solve the deficiencies in the previous process of synthesizing nanocomposites, such as cumbersome steps, high cost, long time, and harmful to the environment, the present invention provides a method for preparing ZnO / SiO with mild reaction conditions, short time, and simple steps. 2 nanocomposite approach

Method used

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  • Method used for preparing ZnO/SiO2 nano composite material
  • Method used for preparing ZnO/SiO2 nano composite material
  • Method used for preparing ZnO/SiO2 nano composite material

Examples

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Embodiment 1

[0025] 1. Preparation of zinc bromoacetate: put 1g ZnO and 3.415g bromoacetic acid into a single-necked round-bottomed flask filled with 100ml of high-purity water in turn, react at 60°C for 1 hour, filter to obtain a clear solution, and evaporate the solvent with a rotary evaporator A white solid was obtained.

[0026] 2. ZnO / SiO 2 Preparation of fluorescent nanocomposites: Dissolve 1.4g of zinc bromoacetate in a mixed solution of 60ml of water and ethanol (volume ratio of water and ethanol=1:1). Dissolve 2.17ml of 3-aminopropyltriethoxysilane and 0.17ml of tetraethyl orthosilicate in 40ml of absolute ethanol and add it dropwise to the solution of zinc bromoacetate to control the amount of the three substances The ratio is zinc bromoacetate:APTES:TEOS=1:2:0.15, magnetically stirred at normal temperature and pressure for 6h, centrifuged at a rate of 8500r / min, and a white powder was obtained after removing the supernatant. Next, it was repeatedly washed with absolute ethanol...

Embodiment 2

[0030] One, the preparation of zinc 3-bromopropionate: 1g ZnO and 4.2g 3-bromopropionate are added successively in a single-necked round-bottomed flask with 100ml high-purity water, and the resulting solution is filtered after reacting in a water bath at 60°C for 1.5h, and the obtained The clear solution was evaporated completely under the rotary evaporator to obtain a white powder.

[0031] 2. ZnO / SiO 2 For the preparation of fluorescent nanocomposites, 1.5 g of zinc 3-bromopropionate was dissolved in a mixture of water and ethanol with a volume ratio of 1:1. Add 2.1ml of APETS and 0.2ml of TEOS mixture into 40ml of absolute ethanol and add this dropwise to the previously obtained zinc 3-bromopropionate solution, controlling the ratio of the three substances to zinc bromoacetate:APTES:TEOS= 1:2:0.15. React at normal temperature and pressure for 6 hours, centrifuge at a speed of 8000 r / min, and wash with ethanol 2-3 times. Dry in a vacuum oven at room temperature for ...

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Abstract

The invention discloses a method used for preparing a ZnO / SiO2 nano composite material. The method comprises following steps: (1) produced zinc bromoacetic acid is dissolved in a mixed solution of water and ethanol so as to obtain a zinc bromoacetic acid solution, a mixed solution of TEOS which is taken as a silicon source and APTES which is used for providing amino group is dissolved in absolute ethyl alcohol, an obtained mixture is added into the zinc bromoacetic acid solution dropwise, and reaction is carried out for 4 to 6h; (2) an obtained product is subjected to centrifugation, is washed with ethanol for 2 to 3 times, and is subjected to drying in a vacuum oven so as to obtain a white powder; and (3) the white powder is delivered into a muffle furnace for roasting so as to obtain the ZnO / SiO2 nano composite material. According to the method, amino group in APTES is taken as a catalyst, silicon dioxide is obtained via catalysis of the silicon source, silicon dioxide particles are generated in roasting at last, no extra catalyst is needed in the reaction process, and the method is harmless for the environment, and is a green synthetic method.

Description

technical field [0001] The invention belongs to the technical field of nano-composite materials, and relates to a method for preparing ZnO / SiO 2 A method for nanocomposite materials, in particular to a self-catalyzed hydrolysis sol-gel method to generate ZnO / SiO 2 Methods for Fluorescence Characterization of Nanocomposites. Background technique [0002] In recent years, due to the special properties of zinc oxide, the research on its synthesis and function as a nanomaterial has become more and more extensive. Especially the presence of nanocomposites as a core-shell structure can effectively increase the properties of ZnO. As the shell material covering ZnO, there are currently high molecular polymers, carbon materials and silicon dioxide to choose from. However, due to the relationship between the thermal stability of polymers and the strength of carbon materials, the use as shell materials is limited. Silica has thermal stability, non-toxicity, and good transparency. A...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/59
Inventor 崔铁钰雷靖宇徐林煦
Owner HARBIN INST OF TECH
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