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Method for preparing ZnO/Ag nanometer composite materials in room temperature

A nano-composite material and room temperature technology, applied in the field of preparing ZnO/Ag nano-composite materials, can solve problems such as harsh conditions and complex processes, and achieve the effects of easy control of the process, simple process, and easy control of the product

Inactive Publication Date: 2013-10-09
UNIV OF SHANGHAI FOR SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The invention discloses a method for preparing ZnO / Ag nanocomposite material at room temperature, in order to overcome the disadvantages of harsh conditions and complicated process in the existing preparation technology

Method used

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  • Method for preparing ZnO/Ag nanometer composite materials in room temperature
  • Method for preparing ZnO/Ag nanometer composite materials in room temperature

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Take 0.8g of nano-zinc powder that has been ground for 5 hours, disperse it in 34ml (water:cyclohexane=17:1) dispersion system, and shake evenly;

[0020] (2) At room temperature, place the reaction system in (1) in a 40KHz sonicator for 6 hours, during which time take out the Erlenmeyer flask and shake vigorously for 30 seconds every 15 minutes; after the treatment, take out the upper milky white suspension for later use;

[0021] (3) Add dropwise 0.1mol / L AgNO to the milky white suspension in (2) 3 solution until the brown-black flocs no longer increase;

[0022] (4) Centrifuge to separate the brown-black precipitate, and wash it with distilled water to remove the Ag inside + and NO 3 - For impurity ions, repeat this step, and finally place the precipitate in a clean reagent bottle;

[0023] (5) Add absolute ethanol to the reagent bottle obtained in step (4), shake to disperse the precipitate evenly, and place it in an ultrasonic machine for ultrasonic dispers...

Embodiment 2

[0026] (1) Get 1.0g of nano-zinc powder ground for 5h, disperse it in 40ml (water:cyclohexane=19:1) dispersion liquid, shake evenly;

[0027] (2) At room temperature, place the reaction system in (1) in a 40KHz sonicator for 8 hours. During this period, take out the Erlenmeyer flask and shake vigorously for 30 seconds every 15 minutes; after the treatment, take out the upper milky white suspension for later use;

[0028] (3) Add a certain amount of 0.1mol / L AgNO dropwise to the milky white suspension in (2) 3 solution until the brown-black flocs no longer increase;

[0029] (4) Centrifuge to separate the brown-black precipitate and wash it with distilled water to remove the Ag inside + and NO 3 - For impurity ions, repeat this step, and finally place the precipitate in a clean reagent bottle;

[0030] (5) Add absolute ethanol to the reagent bottle obtained in step (4), shake to disperse the precipitate evenly, and place it in an ultrasonic machine for ultrasonic dispersion...

Embodiment 3

[0033] (1) Take 1.2g of nano-zinc powder that has been ground for 5 hours, disperse it in 44ml (water:cyclohexane=21:1) dispersion system, and shake it evenly;

[0034] (2) At room temperature, place the reaction system in (1) in a 40KHz sonicator for 10 hours. During this period, take out the Erlenmeyer flask and shake vigorously for 30 seconds every 15 minutes; after the treatment, take out the upper milky white suspension for later use;

[0035] (3) Add a certain amount of 0.1mol / L AgNO dropwise to the milky white suspension in (2) 3 solution until the brown-black flocs no longer increase;

[0036] (4) Centrifuge to separate the brown-black precipitate and wash it with distilled water to remove the Ag inside + and NO 3 - For impurity ions, repeat this step, and finally place the precipitate in a clean reagent bottle;

[0037] (5) Add absolute ethanol to the reagent bottle obtained in step (4), shake to disperse the precipitate evenly, and place it in an ultrasonic machi...

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Abstract

A method for preparing ZnO / Ag nanometer composite materials in a room temperature includes the steps of firstly, placing nanometer zinc powder in a conical flask, adding dispersion liquid to the conical flask, and evenly mixing the nanometer zinc powder with the dispersion liquid in a shaking mode; secondly, placing the conical flask in an ultrasonic apparatus to be processed for 6 hours to 10 hours, taking the conical flask out every 15 minutes and shaking the conical flask for 30 seconds; thirdly, preparing milk white ZnO micro emulsion suspension liquid, and placing the upper portion of the suspension liquid into a test tube; fourthly, dropwise and evenly adding an AgNO3 solution to the test tube, evenly mixing the AgNO3 solution with the suspension liquid in the test tube in a shaking mode until brown-black floccule does not increase any more; fifthly, separating out brown-black sediment in a centrifugal mode, repeatedly washing the sediment through deionized water, placing the sediment into a clean reagent bottle, and adding absolute ethyl alcohol to the reagent bottle to disperse the sediment in a shaking mode, and placing the reagent bottle into the ultrasonic apparatus again for half an hour; sixthly, drying the product in the room temperature, and obtaining the final product, wherein the mass ratio of the nanometer zinc powder to the dispersion liquid ranges between 1 to 10 and 2 to 10, the ratio of water in the dispersion liquid to cyclohexane in the dispersion liquid ranges between 10 to 1 and 21 to 1. The method for preparing the ZnO / Ag nanometer composite materials in the room temperature is simple in process and economical and has environmental friendliness significance, and prepared ZnO / Ag nanometer composite materials are stable in structure and even in granularity.

Description

technical field [0001] The invention relates to a method for preparing ZnO / Ag nano composite material at room temperature, belonging to the technical field of nano material preparation. Background technique [0002] The research and development in the field of nanotechnology is changing with each passing day, and new technologies and materials emerge in an endless stream. However, the basis of all these researches is the reliable preparation of nanomaterials. As a semiconductor material with wide bandgap, nano-ZnO has been widely used in the fields of photocatalysis, piezoelectric materials and electronic devices. However, limited by its own N-type semiconductor and natural defects such as oxygen vacancies and zinc gaps, its optimized optical, electrical, magnetic, and catalytic properties cannot be fully applied. People are considering a series of modifications to the surface of nano-ZnO to tap its potential, among which the research on noble metal doping or surface deposi...

Claims

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Application Information

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IPC IPC(8): B22F9/24
Inventor 陈洪亮王树林包保山
Owner UNIV OF SHANGHAI FOR SCI & TECH
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